MAX473CUA中文资料

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MAX471MAX472的中文资料大全

M A X471M A X472的中文资料大全(总4页)-本页仅作为预览文档封面，使用时请删除本页-MAX471/MAX472的特点、功能美国美信公司生产的精密高端电流检测放大器是一个系列化产品，有MAX471/MA X472、 MAX4172/MAX4173等。

它们均有一个电流输出端，可以用一个电阻来简单地实现以地为参考点的电流/电压的转换，并可工作在较宽电压内。

MAX471/MAX472具有如下特点：●具有完美的高端电流检测功能；●内含精密的内部检测电阻（MAX471）；●在工作温度范围内，其精度为2%；●具有双向检测指示，可监控充电和放电状态；●内部检测电阻和检测能力为3A，并联使用时还可扩大检测电流范围；●使用外部检测电阻可任意扩展检测电流范围（MAX472）；●最大电源电流为100μA；●关闭方式时的电流仅为5μA；●电压范围为3～36V；●采用8脚DIP/SO/STO三种封装形式。

MAX471/MAX472的引脚排列如图1所示，图2所示为其内部功能框图。

表1为MAX471/MAX472的引脚功能说明。

MAX471的电流增益比已预设为500μA/A，由于2kΩ的输出电阻（ROUT）可产生1V/A的转换，因此±3A时的满度值为3V.用不同的ROUT电阻可设置不同的满度电压。

但对于MAX471，其输出电压不应大于VRS+。

对于MAX472，则不能大于。

MAX471引脚图如图１所示，MAX472引脚图如图２所示。

MAX471/MAX472的引脚功能说明引脚名称功能MAX471MAX47211SHDN关闭端。

正常运用时连接到地。

当此端接高电平时，电源电流小于5μA2，3-RS+内部电流检测电阻电池（或电源端）。

“+”仅指示与SIGN输出有关的流动方向。

封装时已将2和3连在了一起-2空脚-3RG1增益电阻端。

通过增益设置电阻连接到电流检测电阻的电池端44GND地或电池负端55SIGN集电极开路逻辑输出端。

ZM4733中文资料

♦These diodes are also available in DO-41 case with the type designation 1N4728 … 1N4764.MECHANICAL DATACase:MELF Glass Case Weight:approx. 0.25 gMAXIMUM RATINGSRatings at 25°C ambient temperature unless otherwise specified.Dimensions are in inches and (millimeters)Characteristics at Tamb = 25 °CSYMBOLMIN.TYP .MAX.UNITThermal Resistance R thJA ––170(1)°C/W Junction to Ambient Air Forward Voltage V F––1.2Voltsat I F = 200 mANOTES:(1) Valid provided that electrodes are kept at ambient temperatureSYMBOL VALUE UNITZener Current (see Table “Characteristics”)Power Dissipation at T amb = 25°C P tot 1.0(1)Watts Junction Temperature T j 150°C Storage Temperature RangeT S– 65 to +150°C12/16/98ELECTRICAL CHARACTERISTICS Ratings at 25°C ambient temperature unless otherwise specified.Type NominalZenervoltage(3)atI ZTV Z(V)TestcurrentI ZT(mA)Maximum Zener impedance(1)Maximumreverse leakage currentZ ZTat I ZT(Ω)Z ZK(Ω)atI ZK(mA)I R(µA)at V R(V)SurgecurrentatT A= 25°CI R(mA)Maximumregulatorcurrent(2)I ZM(mA)ZM4728 3.37610400 1.0100 1.01380276 ZM4729 3.66910400 1.0100 1.01260252 ZM4730 3.9649400 1.050 1.01190234 ZM4731 4.3589400 1.010 1.01070217 ZM4732 4.7538500 1.010 1.0970193 ZM4733 5.1497550 1.010 1.0890178 ZM4734 5.6455600 1.010 2.0810162 ZM4735 6.2412700 1.010 3.0730146 ZM4736 6.837 3.5700 1.010 4.0660133 ZM47377.534 4.07000.510 5.0605121 ZM47388.231 4.57000.510 6.0550110 ZM47399.128 5.07000.5107.0500100 ZM4740102577000.25107.645491 ZM4741112387000.2558.441483 ZM4742122197000.2559.138076 ZM47431319107000.2559.934469 ZM47441517147000.25511.430461 ZM47451615.5167000.25512.228557 ZM47461814207500.25513.725050 ZM47472012.5227500.25515.222545 ZM47482211.5237500.25516.720541 ZM47492410.5257500.25518.219038 ZM4750279.5357500.25520.617034 ZM4751308.54010000.25522.815030 ZM4752337.54510000.25525.113527 ZM4753367.05010000.25527.412525 ZM475439 6.56010000.25529.711523 ZM475543 6.07015000.25532.711022 ZM475647 5.58015000.25535.89519 ZM475751 5.09515000.25538.89018 ZM475856 4.511020000.25542.68016 ZM475962 4.012520000.25547.17014 ZM476068 3.715020000.25551.76513 ZM476175 3.317520000.25556.06012 ZM476282 3.020030000.25562.25511 ZM476391 2.825030000.25569.25010 ZM4764100 2.535030000.25576.0459NOTES:(1) The Zener impedance is derived from the 1KH Z AC voltage which results when an AC current having an RMS value equal to 10% of the Zener current (I ZT or I ZK)is superimposed on I ZT or I ZK. Zener impedance is measured at two points to insure a sharp knee on the breakdown curve and to eliminate unstable units(2) Valid provided that electrodes at a distance of 10mm from case are kept at ambient temperature(3) Measured under thermal equilibrium and DC test conditionsZM4728...ZM4764。

MAX144AEUA中文资料

6 5
GND 4
( ) ARE FOR MAX145 ONLY
µMAX/DIP
*Dice are specified at TA = +25°C, DC parameters only. **Contact factory for availability. Ordering Information continued at end of data sheet.
ELECTRICAL CHARACTERISTICS
(V DD = +2.7V to +5.25V, V REF = 2.5V, 0.1µF capacitor at REF, f SCLK = 2.17MHz, 16 clocks/conversion cycle (108ksps), CH- = GND for MAX145, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER DC ACCURACY (Note 1) Resolution Relative Accuracy (Note 2) Differential Nonlinearity Offset Error Gain Error Gain Temperature Coefficient Channel-to-Channel Offset Matching Channel-to-Channel Gain Matching (Note 3) ±0.8 ±0.05 ±0.05 RES INL DNL MAX14_A MAX14_B No missing codes over temperature 12 ±0.5 ±1 ±0.75 ±3 ±3 Bits LSB LSB LSB LSB ppm/°C LSB LSB SYMBOL CONDITIONS MIN TYP MAX UNITS

MAX485中文资料

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_______________________________概述MAX481、MAX483、MAX485、MAX487-MAX491以及MAX1487是用于RS-485与RS-422通信的低功耗收发器，每个器件中都具有一个驱动器和一个接收器。

MAX483、MAX487、MAX488以及MAX489具有限摆率驱动器，可以减小EMI ，并降低由不恰当的终端匹配电缆引起的反射，实现最高250k b p s 的无差错数据传输。

M A X 481、MAX485、MAX490、MAX491、MAX1487的驱动器摆率不受限制，可以实现最高2.5Mbps 的传输速率。

这些收发器在驱动器禁用的空载或满载状态下，吸取的电源电流在120(A 至500(A 之间。

另外，MAX481、MAX483与MAX487具有低电流关断模式，仅消耗0.1µA 。

所有器件都工作在5V 单电源下。

驱动器具有短路电流限制，并可以通过热关断电路将驱动器输出置为高阻状态，防止过度的功率损耗。

接收器输入具有失效保护特性，当输入开路时，可以确保逻辑高电平输出。

MAX487与MAX1487具有四分之一单位负载的接收器输入阻抗，使得总线上最多可以有128个M A X 487/MAX1487收发器。

使用MAX488-MAX491可以实现全双工通信，而MAX481、MAX483、MAX485、MAX487与MAX1487则为半双工应用设计。

_______________________________应用低功耗RS-485收发器低功耗RS-422收发器电平转换器用于EMI 敏感应用的收发器工业控制局域网____________________下一代器件的特性♦容错应用MAX3430: ±80V 故障保护、失效保护、1/4单位负载、+3.3V 、RS-485收发器MAX3440E-MAX3444E: ±15kV ESD 保护、±60V 故障保护、10Mbps 、失效保护、RS-485/J1708收发器♦对于空间受限应用MAX3460-MAX3464: +5V 、失效保护、20Mbps 、Profibus RS-485/RS-422收发器MAX3362: +3.3V 、高速、RS-485/RS-422收发器，采用SOT23封装MAX3280E-MAX3284E: ±15kV ESD 保护、52Mbps 、+3V 至+5.5V 、SOT23、RS-485/RS-422、真失效保护接收器MAX3293/MAX3294/MAX3295: 20Mbps 、+3.3V 、SOT23、RS-485/RS-422发送器♦对于多通道收发器应用MAX3030E-MAX3033E: ±15kV ESD 保护、+3.3V 、四路RS-422发送器♦对于失效保护应用MAX3080-MAX3089: 失效保护、高速(10Mbps)、限摆率RS-485/RS-422收发器♦对于低电压应用MAX3483E/MAX3485E/MAX3486E/MAX3488E/MAX3490E/MAX3491E: +3.3V 供电、±15kV ESD 保护、12Mbps 、限摆率、真正的RS-485/RS-422收发器MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487低功耗、限摆率、RS-485/RS-422收发器_____________________________________________________________________选择表19-0122; Rev 8; 10/03定购信息在本资料的最后给出。

MAX485中文数据手册资料

MAX485中文资料2009-11-28 14:49MAX485中文资料，MAX485 PDF,DATASHEET,电路图，通讯程序内容介绍：MAX481、MAX483、MAX485、MAX487-MAX491以及MAX1487是用于RS-485与RS-422通信的低功耗收发器，每个器件中都具有一个驱动器和一个接收器。

MAX483、MAX487、MAX488以及MAX489具有限摆率驱动器，可以减小EMI，并降低由不恰当的终端匹配电缆引起的反射，实现最高250kbps 的无差错数据传输。

MAX481、MAX485、MAX490、MAX491、MAX1487的驱动器摆率不受限制，可以实现最高2.5Mbps的传输速率。

这些收发器在驱动器禁用的空载或满载状态下，吸取的电源电流在120(A 至500(A 之间。

另外，MAX481、MAX483与MAX487具有低电流关断模式，仅消耗0.1µA。

所有器件都工作在5V单电源下。

驱动器具有短路电流限制，并可以通过热关断电路将驱动器输出置为高阻状态，防止过度的功率损耗。

接收器输入具有失效保护特性，当输入开路时，可以确保逻辑高电平输出。

MAX481,MAX483,MAX485,MAX487,MAX1487引脚（管脚）图及工作电路MAX485通讯程序与MAX232通讯程序在本质上是一样的，只是MAX485通讯程序需要加上通讯方向控制。

下面是基于mega128 16AU的485通信中断接收的程序，调试通过,晶振为外部16M,MAX485的DE和RE短接连PC0口，程序如下：#define SEND_485 PORTC|=0x01#define READ_485 PORTC&=0xfevoid Usart1_init(void) //16Mhz频率，设置波特率9.6k，8位数据位，无校验，接收发送使能，1位停止位{UBRR1H=0;UBRR1L=103;UCSR1B=(1<<RXCIE1)|(1<<RXEN1)|(1<<TXEN1); //发送接收使能，使用中断方式，UCSR1C=(1<<UCSZ10)|(1<<UCSZ11); //0x06 8位数据，1位停止位，无校验}void Usart1_transmit(unsigned char c) //查询方式发送接收字符函数{SEND_485;DelayBus();DelayBus();DelayBus();while( !(UCSR1A&(1<<UDRE1)));//等待发送缓冲区为空UDR1=c;while(!(UCSR1A&(1<<TXC1)));// UDCR0=c;UCSR1A |= _BV(TXC1);//将发送结束标志位清零// SET_BIT(UCSR1A,);READ_485;direction++;}SIGNAL(SIG_UART1_RECV)//serial port 1 {if(UCSR1A&(1<<RXC1)){rec1buff=UDR1;rec1_flag=1;。

MAX253CUA中文资料

_______________General Description The MAX253 is a monolithic oscillator/power-driver, specifically designed to provide isolated power for an isolated RS-485 or RS-232 data interface. It drives a center-tapped transformer primary from a 5V or 3.3V DC power supply. The secondary can be wound to provide any isolated voltage needed at power levels up to 1W.The MAX253 consists of a CMOS oscillator driving a pair of N-channel power switches. The oscillator runs at double the output frequency, driving a toggle flip-flop to ensure 50% duty cycle to each of the switches. Internal delays are arranged to ensure break-before-make action between the two switches.The SD pin puts the entire device into a low-power shutdown state, disabling both the power switches and oscillator.________________________Applications Isolated RS-485/RS-232 Power-SupplyTransformer DriverHigh Noise-Immunity Communications InterfaceIsolated and/or High-Voltage Power SuppliesBridge Ground DifferentialsMedical EquipmentProcess Control ____________________________Featureso Power-Supply Transformer Driver for Isolated RS-485/RS-232 Data-Interface Applicationso Single +5V or +3.3V Supplyo Low-Current Shutdown Mode: 0.4µAo Pin-Selectable Frequency: 350kHz or 200kHzo8-Pin DIP, SO, and µMAX Packages______________Ordering Information**Contact factory for availability and processing to MIL-STD-883.MAX253Transformer Driver forIsolated RS-485 Interface ________________________________________________________________Maxim Integrated Products1__________________Pin Configuration__________Typical Operating CircuitCall toll free 1-800-998-8800 for free samples or literature.19-0226; Rev 0; 1/94M A X 253Transformer Driver for Isolated RS-485 Interface 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS(V CC = 5V ±10%, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.)Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Note 1:Operating supply current is the current used by the MAX253 only, not including load current.Note 2:Shutdown supply current includes output switch-leakage currents.PARAMETERMINTYP MAX UNITS Shutdown Input Threshold 0.8µA 2.4V Shutdown Supply Current (Note 2)0.4µA Operating Supply Current (Note 1)0.45 5.0mA Shutdown Input Leakage Current 10pA 2.4V FS Input Threshold 0.850µA Switch On Resistance 1.5 4.0Ω250350500kHz Switch Frequency150200300FS Input Leakage Current 10pA Start-Up Voltage2.52.2VCONDITIONSFS = V CCLowHigh SD = V CC No load, SD = 0V, FS low High Low FS = 0V D1, D2; 100mA FS = V CC or open FS = 0VSupply Voltage (V CC )...............................................-0.3V to +7V Control Input Voltages (SD, FS).................-0.3V to (V CC + 0.3V)Output Switch Voltage (D1, D2).............................................12V Peak Output Switch Current (D1, D2)......................................1A Average Output Switch Current (D1, D2).........................200mA Continuous Power Dissipation (T A = +70°C)Plastic DIP (derate 9.09mW/°C above +70°C).............727mW SO (derate 5.88mW/°C above +70°C)..........................471mW µMAX (derate 4.10mW/°C above +70°C).....................330mW CERDIP (derate 8.00mW/°C above +70°C)..................640mWOperating Temperature RangesMAX253C_ _........................................................0°C to +70°C MAX253E_ _.....................................................-40°C to +85°C MAX253MJA...................................................-55°C to +125°C Junction TemperaturesMAX253C_ _/E_ _..........................................................+150°C MAX253MJA.................................................................+175°C Storage Temperature Range.............................-65°C to +160°C Lead Temperature (soldering, 10sec).............................+300°CMAX253Transformer Driver for Isolated RS-485 Interface_______________________________________________________________________________________310.56.0-60-2060140OUTPUT RESISTANCE vs. TEMPERATURE(FS = LOW)7.09.5TEMPERATURE (°C)O U T P U T R E S I S T A N C E (Ω)201008.58.06.57.510.09.0-4008040120156-60-2060140OUTPUT RESISTANCE vs. TEMPERATURE(FS = HIGH)TEMPERATURE (°C)O U T P U T R E S I S T A N C E (Ω)20100912-40080401201.0-60-2060140SHUTDOWN SUPPLY CURRENTvs. TEMPERATURETEMPERATURE (°C)S H U T D O W N C U R R E N T (µA )201000.40.8-40080401200.60.2260160-60-2060140D1, D2 FREQUENCY vs. TEMPERATURE(FS = LOW)TEMPERATURE (°C)F R E Q U E N C Y (k H z )20100200240-4008040120220180850400-60-2060140SUPPLY CURRENT vs. TEMPERATURE(FS = HIGH)500750TEMPERATURE (°C)S U P P L Y C U R R E N T (µA )20100650600450550800700-4008040120480280-60-2060140D1, D2 FREQUENCY vs. TEMPERATURE(FS = HIGH)TEMPERATURE (°C)F R E Q U E N C Y (k H z )20100360440-4008040120400320550250-60-2060140SUPPLY CURRENT vs. TEMPERATURE(FS = LOW)TEMPERATURE (°C)S U P P L Y C U R R E N T (µA )20100350-40080401203004005004506001000 40 120 200 EFFICIENCY vs. LOAD CURRENT(FS = LOW)20 80 LOAD CURRENT (mA)E F F I C I E N C Y (%)80 160 60 40 10 3090 70 50 20 60 140 100 180__________________________________________Typical Operating Characteristics(Circuit of Figure 6, V IN = 5V ±10%, T A = +25°C, unless otherwise noted.)M A X 253Transformer Driver for Isolated RS-485 Interface 4_______________________________________________________________________________________100040220OUTPUT VOLTAGE vs. LOAD CURRENT(FS = LOW)28LOAD CURRENT (mA)O U T P U T V O L T A G E (V )806413975206014012010016018020010040220OUTPUT VOLTAGE vs. LOAD CURRENT(FS = HIGH)28LOAD CURRENT (mA)O U T P U T V O L T A G E (V )8064139752060140120100160180200CIRCUIT OF FIGURE 1SWITCHING WAVEFORMS(TWO CYCLES)D1D2CIRCUIT OF FIGURE 1SWITCHING WAVEFORMS (BREAK BEFORE MAKE)D1D2CIRCUIT OF FIGURE 6TIME FROM SHUTDOWN TO POWER-UPSDTP1 (OUTPUT VOLTAGE)____________________________Typical Operating Characteristics (continued)(Circuit of Figure 6, V IN = 5V ±10%, T A = +25°C, unless otherwise noted.)100 0 040 120 200 EFFICIENCY vs. LOAD CURRENT(FS = HIGH)20 80 LOAD CURRENT (mA) E F F I C I E N C Y (%)80 160 60 40 10 30 90 70 50 20 60 140 100 180MAX253Transformer Driver for Isolated RS-485 Interface_______________________________________________________________________________________5_____________________Pin DescriptionNot internally connected.N.C.5+5V supply voltage.V CC 6GND27Open drain of N-channel transformer drive 2.D28SD 4FS 3PIN GND12Open drain of N-channel transfomer drive 1.D11FUNCTIONNAME _______________Detailed DescriptionThe MAX253 is an isolated power-supply transformer driver specifically designed to form the heart of a fully isolated RS-485 data interface. Completely isolated communications are obtained by combining the MAX253 with a linear regulator, a center-tapped trans-former, optocouplers, and the appropriate Maxim inter-face product (as described in the Isolated RS-485/RS-232 Data Interface section).The MAX253 consists of an RC oscillator followed by a toggle flip-flop, which generates two 50% duty-cycle square waves, out-of-phase at half the oscillator fre-quency (see Figure 2). These two signals drive the ground-referenced output switches. Internal delays ensure break-before-make action between the two switches.Ground SD for normal operation. When high, SD dis-ables all internal circuitry, including the oscillator and both power switches.Pulling FS low reduces the oscillator frequency and low-ers the supply current (see Supply Current vs.Temperature in the Typical Operating Characteristics ).FS includes a weak pull-up, so it will float to the high-fre-quency state if not connected.Ground. Connect both GND1 and GND2to ground.Frequency switch. If FS = V CC or open,switch frequency = 350kHz; if FS = 0V,switch frequency = 200kHz.Shutdown. Ground for normal operation,tie high for shutdown.Ground. Connect both GND1 and GND2to ground.M A X 253Transformer Driver for Isolated RS-485 Interface 6_______________________________________________________________________________________Figure 3. Typical RS-485 Application Circuit, 5V ConfigurationMAX253Transformer Driver for Isolated RS-485 Interface_______________________________________________________________________________________7Figure 4. Typical RS-485 Application Circuit, 3.3V ConfigurationM A X 253Transformer Driver for Isolated RS-485 Interface 8_______________________________________________________________________________________Figure 5. Typical RS-232 Application CircuitMAX253Transformer Driver for Isolated RS-485 Interface_______________________________________________________________________________________9* PC-Series Optocouplers, Sharp ElectronicsUSA Phone: (206) 834-2500FAX: (206) 834-8903Sharp Electronics, Europe GmbHGermany Phone: (040) 2376-0FAX: (040) 230764__________Applications InformationFigures 3–5 are typical isolated RS-485/RS-232 data-inter-face circuits. These circuits withstand 1800V RMS (1sec)and are intended for industrial communications and control applications where very high voltage transients, differential ground potentials, or high noise may be encountered.Table 2 lists transformer characteristics for the applica-tions of Figures 3–10. Some suggested manufacturers of transformers, transformer cores, and optocouplers are listed in Table 3, along with their respective phone and fax numbers.Important layout considerations include:o For maximum isolation, the “isolation barrier” should not be breached. Connections and components from one side should not be located near those of the other side.o Since the optocoupler outputs are relatively high-impedance nodes, they should be located as close as possible to the Maxim interface IC. This mini-mizes stray capacitance and maximizes data rate. Refer to the µMAX package information for pin spacing and physical dimensions.Isolated RS-485 Data InterfaceThe MAX253 power-supply transformer driver is designed specifically for isolated RS-485 data-interface applications. The application circuits of Figures 3 and 4combine the MAX253 with a low-dropout linear regulator,a transformer, several high-speed optocouplers, and a Maxim RS-485 interface device. With a few modifica-tions to these circuits, full-duplex communications can be implemented by substituting the MAX481/MAX485with the MAX490/MAX491 (for data rates up to 2.5Mbps)or substituting the MAX483/MAX487 with the MAX488/MAX489 (for data rates up to 250kbps).The data transfer rates of the application circuits in Figures 3 and 4 are critically limited by the optocou-plers. Table 1 lists suggested optocouplers and theappropriate Maxim interface device for data-transfer rates up to 2.5Mbps.Refer to the MAX1480 data sheet for a complete isolat-ed RS-485 solution in one package.Isolated RS-232 Data InterfaceThe MAX253 is ideal for isolated RS-232 data-interface applications requiring more than four transceivers. The 1W power output capability of the MAX253 enables it to drive more than 10 transceivers simultaneously. Figure 5shows the typical application circuit for a complete 120kbps isolated RS-232 data interface. The figure also shows how the Sharp PC417 optocouplers can be replaced by the lower-cost 4N25 devices to achieve data-transfer rates up to 9.6kbps.For 3.3V operation, substitute the primary portion of Figure 5 with the circuit of Figure 7.For applications requiring two transceivers or fewer,refer to the MAX250/MAX251 or MAX252 data sheet.Isolated Power SuppliesThe MAX253 is a versatile isolated power driver, capa-ble of driving a center-tapped transformer primary from a 5V or a 3.3V DC power supply (see Figures 6 and 7).The secondary can be wound to provide any isolated voltage needed at power levels up to 1W with a 5V sup-ply, or 600mW with a 3.3V supply. Figure 6 shows a typical 5V to isolated 5V application circuit that delivers up to 200mA of isolated 5V power.In Figure 7, the MAX253 is configured to operate from a 3.3V supply, deriving a “boost” V CC for the MAX253 by connecting diodes to both ends of the transformer pri-mary. This produces nearly double the input supply,and may be useful for other applications, as shown in Figure 4. The average current in each MAX253 switch must still be limited to less than 200mA, so the total power available is approximately 600mW.Table 1. Optocouplers and RS-485 Interface ICs for Various Data RatesDATA RATE FULL DUPLEX RS-485 IC HALF DUPLEX RS-485 IC OPTOCOUPLER FOR DI / ROOPTOCOUPLERFOR DE250kbps MAX488/MAX489MAX483/MAX487PC417*PC357T*2.5MbpsMAX490/MAX491MAX481/MAX485PC410*PC357TM A X 253Transformer Driver for Isolated RS-485 Interface 10______________________________________________________________________________________Figure 6. 5V to Isolated 5V Application CircuitFigure 7. 3.3V to Isolated 5V Application CircuitMAX253Transformer Driver for Isolated RS-485 Interface______________________________________________________________________________________11Figure 8. Typical 4mA to 20mA Application CircuitOutput-Ripple FilteringA simple lowpass pi-filter (Figures 6 and 7) can be added to the output to reduce output ripple noise to about 10mVp-p. The cutoff frequency shown is 21kHz. Since the filter inductor is in series with the circuit output, minimize its resistance so the voltage drop across it is not excessive.Isolated 4mA to 20mA Analog Interface The 4mA to 20mA current loop is a standard analog signal range that is widely used in the process-control industry for transducer and actuator control signals.These signals are commonly referred to a distant ground that may be at a considerably higher voltage with respect to the local ground.An analog signal in the range of 0.1V to 0.5V is applied to the first MAX480 to generate a signal current in the range of 20µA to 100µA. This low-level signal is trans-ferred across the barrier by the Siemens IL300 linear optocoupler. This device is unique in that it corrects the dominant nonlinearity present in most optocou-plers—the LED efficiency variation. The IL300 is really two optocouplers in the same package sharing the same LED; one detector is across the isolation barrier, the other is on the same side as the LED (Figure 8). The lat-ter detector is used to generate a feedback signal identi-cal to the signal on the isolated side of the barrier. The current signal transferred across the barrier is converted back to a voltage that matches the input in the 100mV to 500mV range. This voltage is then transformed to the final 4mA to 20mA current signal range by the second MAX480, Darlington stage, and the 20Ωresistor.Isolated ADCAlmost any serial-interface device is a candidate for operation across an isolation barrier; Figure 10 illus-trates one example. The MAX176 analog-to-digital converter (ADC) operates from +5V and -12V supplies,provided by the multiple-tapped secondary and linear regulators. If some additional isolated power is needed for signal conditioning, multiplexing, or possibly for aM A X 253Transformer Driver for Isolated RS-485 Interface 12______________________________________________________________________________________Figure 9a. Half-Wave Rectifier—BipolarFigure 9b. Full-Wave Rectifier—BipolarFigure 9c. Full-Wave Rectifier—UnipolarMAX253Transformer Driver for Isolated RS-485 InterfaceM A X 253Transformer Driver for Isolated RS-485 Interface 14______________________________________________________________________________________sensor, an extra several hundred milliwatts could easily be supplied by the circuit, as shown. A +12V supply could be generated by adding two more diodes to the ends of the secondary, and a -5V supply could be gen-erated by connecting additional diodes to the 1/4 and 3/4 tap points on the secondary. For +5V only applica-tions, the MAX187 is recommended.______________Component SelectionTransformer SelectionThe transformer primary used with the MAX253 must be a center-tapped winding with sufficient ET product to prevent saturation at the worst-case lowest selected frequency. The MAX253’s guaranteed minimum fre-quency with the FS pin held low is 150kHz, equating to a maximum period of 6.67µs. The required ET productfor half the primary is simply the product of the maxi-mum supply voltage and half the maximum period.With FS tied high, the guaranteed minimum frequency is 250kHz, giving a maximum period of 4µs.The secondary winding may or may not be center tapped, depending on the rectifier topology used. The phasing of the secondary winding is not critical. In some applications, multiple secondaries might be required. Half-wave rectification could be used, but is discouraged because it normally adds a DC imbalance to the magnetic flux in the core, reducing the ET prod-uct. If the DC load is imbalanced, full-wave rectification is recommended, as shown in Figure 9b.The transformer turns ratio must be set to provide the minimum required output voltage at the maximum anticipated load with the minimum expected input volt-Table 2. Typical Transformer CharacteristicsTable 3. Transformer, Transformer Core, and Optocoupler SuppliersCHARACTERISTIC+5V to ±10V +5V to +5V +3.3V to +5V +5V to +24V+5V to ±5V; ±12V Figure 9a 2, 3, 5, 64, 7810Turns Ratio 1CT*:11CT:1.3CT 1CT:2.1CT 1CT:5CT 1CT:1.5CT:3CT Primary 44CT 44CT 28CT 44CT 44CT Typical Windings Secondary 4456CT 56CT 220CT 66CT, 132CT FS Low 18.3V-µs 18.3V-µs 12V-µs 18.3V-µs 18.3V-µs Primary ET ProductFS High11V-µs11V-µs7.2V-µs11V-µs 11V-µsTRANSFORMERSTRANSFORMER CORESOPTOCOUPLERSBH ElectronicsPhone: (507) 532-3211FAX: (507) 532-3705Philips Components Phone: (407) 881-3200FAX: (407) 881-3300Quality TechnologyPhone: (408) 720-1440FAX: (408) 720-0848CoilcraftPhone: (708) 639-6400FAX: (708) 639-1469Magnetics Inc.Phone: (412) 282-8282FAX: (412) 282-6955Sharp ElectronicsPhone: (206) 834-2500FAX: (206) 834-8903CoiltronicsPhone: (407) 241-7876FAX: (407) 241-9339Fair-Rite ProductsPhone: (914) 895-2055FAX: (914) 895-2629Siemens Components Phone: (408) 777-4500FAX: (408) 777-4983*CT = Center Tappedage. In addition, include in the calculations an allowance for worst-case losses in the rectifiers. Since the turns ratio determined in this manner will ordinarily produce a much higher voltage at the secondary under conditions of high input voltage and/or light loading, be careful to prevent an overvoltage condition from occur-ring (see Output Voltage vs. Load Current in the Typical Operating Characteristics ).Transformers used with the MAX253 will ordinarily be wound on high-permeability magnetic material. To min-imize radiated noise, use common closed-magnetic-path physical shapes (e.g., pot cores, toroids, E/I/U cores). A typical core is the Philips 213CT050-3B7,which is a toroid 0.190” in diameter and 0.05” thick.For operation with this core at 5.5V maximum supply voltage, the primary should have about 22 turns on each side of the center tap, or 44 turns total. This will result in a nominal primary inductance of about 832µH.The secondary can be scaled to produce the required DC output.Diode SelectionThe MAX253’s high switching frequency demands high-speed rectifiers. Schottky diodes are recom-mended. Ensure that the Schottky diode average cur-rent rating exceeds the load-current level. The 1N5817is a good choice for through-hole applications, and the NIEC* SB05W05C dual in an SOT-23 package is rec-ommended for surface-mount applications. Use the higher frequency setting to reduce ripple.Output Filter CapacitorIn applications sensitive to output-ripple noise, the out-put filter capacitor C2 should have a low effective series resistance (ESR), and its capacitance should remain fairly constant over temperature. Sprague 595D surface-mount solid tantalum capacitors and Sanyo OS-CON through-hole capacitors are recommended due to their extremely low ESR. Capacitor ESR usually rises at low temperatures, but OS-CON capacitors pro-vide very low ESR below 0°C.In applications where output ripple is not critical, a 0.1µF chip or ceramic capacitor is sufficient. Refer to Table 4 for suggested capacitor suppliers. Use the higher frequency setting to reduce ripple.Input Bypass CapacitorThe input bypass capacitor C1 is not critical. Unlike switching regulators, the MAX253’s supply current is fairly constant, and is therefore less dependent on the input bypass capacitor. A low-cost 0.1µF chip or ceramic capacitor is normally sufficient for inputMAX253Transformer Driver for Isolated RS-485 Interface______________________________________________________________________________________15* Nihon Inter Electronics A Phone: (805) 867-2555FAX: (805) 867-2556Japan Phone: 81-3-3494-7411FAX: 81-3-3494-7414Table 4. Suggested Capacitor SuppliersPRODUCTION METHODCAPACITORSSurface MountMatsuo267 series (low ESR)USA Phone: (714) 969-2491, FAX: (714) 960-6492Sprague Electric Co.595D/293D series (very low ESR)USA Phone: (603) 224-1961, FAX: (603) 224-1430Murata Erie CeramicUSA Phone: (800) 831-9172, FAX: (404) 436-3030High-Performance Through HoleSanyoOS-CON series (very low ESR)USA Phone: (619) 661-6835, FAX: (619) 661-1055Japan Phone: 81-7-2070-1005, FAX: 81-7-2070-1174Through HoleNichiconPL series (low ESR)USA Phone: (708) 843-7500, FAX: (708) 843-2798Japan Phone: 81-7-5231-8461, FAX: 81-7-5256-4158implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.16__________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600©1994 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.M A X 253Transformer Driver for Isolated RS-485 Interface ________________________________________________________Package Information___________________Chip TopographyTRANSISTOR COUNT: 31;SUBSTRATE CONNECTED TO V CC .V CCGND20.085" (2.159mm)0.058" (1.4732mm)D1D2。

max485esa中文资料

General DescriptionThe MAX481, MAX483, MAX485, MAX487–MAX491, andMAX1487 are low-power transceivers for RS-485 and RS-422 communication. Each part contains one driver and onereceiver. The MAX483, MAX487, MAX488, and MAX489feature reduced slew-rate drivers that minimize E MI andreduce reflections caused by improperly terminated cables,thus allowing error-free data transmission up to 250kbps.The driver slew rates of the MAX481, MAX485, MAX490,MAX491, and MAX1487 are not limited, allowing them totransmit up to 2.5Mbps.These transceivers draw between 120µA and 500µA ofsupply current when unloaded or fully loaded with disableddrivers. Additionally, the MAX481, MAX483, and MAX487have a low-current shutdown mode in which they consumeonly 0.1µA. All parts operate from a single 5V supply.Drivers are short-circuit current limited and are protectedagainst excessive power dissipation by thermal shutdowncircuitry that places the driver outputs into a high-imped-ance state. The receiver input has a fail-safe feature thatguarantees a logic-high output if the input is open circuit.The MAX487 and MAX1487 feature quarter-unit-loadreceiver input impedance, allowing up to 128 MAX487/MAX1487 transceivers on the bus. Full-duplex communi-cations are obtained using the MAX488–MAX491, whilethe MAX481, MAX483, MAX485, MAX487, and MAX1487are designed for half-duplex applications.________________________Applications Low-Power RS-485 Transceivers Low-Power RS-422 Transceivers Level Translators Transceivers for EMI-Sensitive Applications Industrial-Control Local Area Networks__Next Generation Device Features o For Fault-Tolerant Applications MAX3430: ±80V Fault-Protected, Fail-Safe, 1/4Unit Load, +3.3V, RS-485 Transceiver MAX3440E–MAX3444E: ±15kV ESD-Protected,±60V Fault-Protected, 10Mbps, Fail-Safe, RS-485/J1708 Transceivers o For Space-Constrained Applications MAX3460–MAX3464: +5V, Fail-Safe, 20Mbps,Profibus RS-485/RS-422 Transceivers MAX3362: +3.3V, High-Speed, RS-485/RS-422Transceiver in a SOT23 Package MAX3280E–MAX3284E: ±15kV ESD-Protected,52Mbps, +3V to +5.5V, SOT23, RS-485/RS-422,True Fail-Safe Receivers MAX3293/MAX3294/MAX3295: 20Mbps, +3.3V,SOT23, RS-485/RS-422 Transmitters o For Multiple Transceiver Applications MAX3030E–MAX3033E: ±15kV ESD-Protected,+3.3V, Quad RS-422 Transmitters o For Fail-Safe Applications MAX3080–MAX3089: Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422Transceiverso For Low-Voltage ApplicationsMAX3483E/MAX3485E/MAX3486E/MAX3488E/MAX3490E/MAX3491E: +3.3V Powered, ±15kVESD-Protected, 12Mbps, Slew-Rate-Limited,True RS-485/RS-422 Transceivers For pricing, delivery, and ordering information, please contact Maxim Direct at1-888-629-4642, or visit Maxim Integrated’s website at .______________________________________________________________Selection Table19-0122; Rev 10; 9/14PARTNUMBERHALF/FULL DUPLEX DATA RATE (Mbps) SLEW-RATE LIMITED LOW-POWER SHUTDOWN RECEIVER/DRIVER ENABLE QUIESCENT CURRENT (μA) NUMBER OF RECEIVERS ON BUS PIN COUNT MAX481Half 2.5No Yes Yes 300328MAX483Half 0.25Yes Yes Yes 120328MAX485Half 2.5No No Yes 300328MAX487Half 0.25Yes Yes Yes 1201288MAX488Full 0.25Yes No No 120328MAX489Full 0.25Yes No Yes 1203214MAX490Full 2.5No No No 300328MAX491Full 2.5No No Yes 3003214MAX1487 Half 2.5No No Yes 2301288Ordering Information appears at end of data sheet.找电子元器件上宇航军工MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Low-Power, Slew-Rate-LimitedRS-485/RS-422 TransceiversPackage Information For the latest package outline information and land patterns, go to . Note that a “+”, “#”, or “-”in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.16Low-Power, Slew-Rate-Limited RS-485/RS-422 TransceiversMAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-100017©2014 Maxim Integrated Products, Inc.Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.。

MAX系列芯片大全

MAXIM/DALLAS 中文数据资料DS12CR887, DS12R885, DS12R887 RTC，带有恒压涓流充电器DS1870 LDMOS RF功放偏置控制器DS1921L-F5X Thermochron iButtonDS1923 温度/湿度记录仪iButton，具有8kB数据记录存储器DS1982, DS1982-F3, DS1982-F5 1k位只添加iButton?DS1990A 序列号iButtonDS1990R, DS1990R-F3, DS1990R-F5 序列号iButtonDS1991 多密钥iButtonDS2129 LVD SCSI 27线调节器DS2401 硅序列号DS2406 双通道、可编址开关与1k位存储器DS2408 1-Wire、8通道、可编址开关DS2411 硅序列号，带有VCC输入DS2413 1-Wire双通道、可编址开关DS2430A 256位1-Wire EEPROMDS2431 1024位、1-Wire EEPROMDS2480B 串行、1-Wire线驱动器，带有负荷检测DS2482-100 单通道1-Wire主控制器DS2482-100 勘误表PDF: 2482-100A2DS2482-800, DS2482S-800 八通道1-Wire主控制器DS2482-800 勘误表PDF: 2482-800A2DS2502 1k位只添加存储器DS2505 16k位只添加存储器DS28E04-100 4096位、可寻址、1-Wire EEPROM，带有PIODS3170DK DS3/E3单芯片收发器开发板DS3231, DS3231S 高精度、I2C集成RTC/TCXO/晶振DS33Z44 四路以太网映射器DS3902 双路、非易失、可变电阻器，带有用户EEPROMDS3906 三路、非易失、小步长调节可变电阻与存储器DS3984 4路冷阴极荧光灯控制器DS4302 2线、5位DAC，提供三路数字输出DS80C400-KIT DS80C400评估套件DS80C410, DS80C411 具有以太网和CAN接口的网络微控制器DS80C410 勘误表PDF: 80C410A1DS89C430, DS89C440, DS89C450 超高速闪存微控制器DS89C430 勘误表PDF: 89C430A2DS89C440 勘误表PDF: 89C440A2DS89C450 勘误表PDF: 89C450A2DS89C430 勘误表PDF: 89C430A3DS89C440 勘误表PDF: 89C440A3DS89C450 勘误表PDF: 89C450A3DS89C430 勘误表PDF: 89C430A5DS89C440 勘误表PDF: 89C440A5DS89C450 勘误表PDF: 89C450A5DS9090K 1-Wire器件评估板, B版DS9097U-009, DS9097U-E25, DS9097U-S09 通用1-Wire COM端口适配器DS9490, DS9490B, DS9490R USB至1-Wire/iButton适配器MAX1034, MAX1035 8/4通道、±VREF多量程输入、串行14位ADCMAX1072, MAX1075 1.8Msps、单电源、低功耗、真差分、10位ADCMAX1076, MAX1078 1.8Msps、单电源供电、低功耗、真差分、10位ADC，内置电压基准MAX1146, MAX1147, MAX1148, MAX1149 多通道、真差分、串行、14位ADCMAX1149EVKIT MAX1149评估板/评估系统MAX1220, MAX1257, MAX1258 12位、多通道ADC/DAC，带有FIFO、温度传感器和GPIO端口MAX1224, MAX1225 1.5Msps、单电源、低功耗、真差分、12位ADCMAX1258EVKIT MAX1057, MAX1058, MAX1257, MAX1258评估板/评估系统MAX1274, MAX1275 1.8Msps、单电源、低功耗、真差分、12位ADCMAX13000E, MAX13001E, MAX13002E, MAX13003E, MAX13004E, MAX13005E 超低电压电平转换器MAX1302, MAX1303 8/4通道、±VREF多量程输入、串行16位ADCMAX1304, MAX1305, MAX1306, MAX1308, MAX1309, MAX1310, MAX1312, MAX1313,MAX1314 8/4/2通道、12位、同时采样ADC，提供±10V、±5V或0至+5V模拟输入范围MAX13050, MAX13052, MAX13053, MAX13054 工业标准高速CAN收发器，具有±80V故障保护MAX13080E, MAX13081E, MAX13082E, MAX13083E, MAX13084E, MAX13085E, MAX13086E, MAX13087E, MAX13088E, MAX13089E +5.0V、±15kV ESD保护、失效保护、热插拔、RS-485/RS-422收发器MAX13101E, MAX13102E, MAX13103E, MAX13108E 16通道、带有缓冲的CMOS逻辑电平转换器MAX1334, MAX1335 4.5Msps/4Msps、5V/3V、双通道、真差分10位ADCMAX1336, MAX1337 6.5Msps/5.5Msps、5V/3V、双通道、真差分8位ADCMAX13481E, MAX13482E, MAX13483E ±15kV ESD保护USB收发器, 外部/内部上拉电阻MAX1350, MAX1351, MAX1352, MAX1353, MAX1354, MAX1355, MAX1356, MAX1357 双路、高端、电流检测放大器和驱动放大器MAX1450 低成本、1%精确度信号调理器，用于压阻式传感器MAX1452 低成本、精密的传感器信号调理器MAX1487, MAX481, MAX483, MAX485, MAX487, MAX488, MAX489, MAX490, MAX491 低功耗、限摆率、RS-485/RS-422收发器MAX1492, MAX1494 3位半和4位半、单片ADC，带有LCD驱动器MAX1494EVKIT MAX1493, MAX1494, MAX1495评估板/评估系统MAX1497, MAX1499 3位半和4位半、单片ADC，带有LED驱动器和μC接口MAX1499EVKIT MAX1499评估板/评估系统MAX15000, MAX15001 电流模式PWM控制器, 可调节开关频率MAX1515 低电压、内置开关、降压/DDR调节器MAX1518B TFT-LCD DC-DC转换器, 带有运算放大器MAX1533, MAX1537 高效率、5路输出、主电源控制器，用于笔记本电脑MAX1533EVKIT MAX1533评估板MAX1540A, MAX1541 双路降压型控制器，带有电感饱和保护、动态输出和线性稳压器MAX1540EVKIT MAX1540评估板MAX1551, MAX1555 SOT23、双输入、USB/AC适配器、单节Li+电池充电器MAX1553, MAX1554 高效率、40V、升压变换器，用于2至10个白光LED驱动MAX1556, MAX1557 16μA IQ、1.2A PWM降压型DC-DC转换器MAX1556EVKIT MAX1556EVKIT评估板MAX1558, MAX1558H 双路、3mm x 3mm、1.2A/可编程电流USB开关，带有自动复位功能MAX1586A, MAX1586B, MAX1586C, MAX1587A, MAX1587C 高效率、低IQ、带有动态内核的PMIC，用于PDA和智能电话MAX16801A/B, MAX16802A/B 离线式、DC-DC PWM控制器, 用于高亮度LED驱动器MAX1858A, MAX1875A, MAX1876A 双路180°异相工作的降压控制器，具有排序/预偏置启动和POR MAX1870A 升/降压Li+电池充电器MAX1870AEVKIT MAX1870A评估板MAX1874 双路输入、USB/AC适配器、1节Li+充电器，带OVP与温度调节MAX1954A 低成本、电流模式PWM降压控制器，带有折返式限流MAX1954AEVKIT MAX1954A评估板MAX19700 7.5Msps、超低功耗模拟前端MAX19700EVKIT MAX19700评估板/评估系统MAX19705 10位、7.5Msps、超低功耗模拟前端MAX19706 10位、22Msps、超低功耗模拟前端MAX19707 10位、45Msps、超低功耗模拟前端MAX19708 10位、11Msps、超低功耗模拟前端MAX2041 高线性度、1700MHz至3000MHz上变频/下变频混频器，带有LO缓冲器/开关MAX2043 1700MHz至3000MHz高线性度、低LO泄漏、基站Rx/Tx混频器MAX220, MAX222, MAX223, MAX225, MAX230, MAX231, MAX232, MAX232A, MAX233,MAX233A, MAX234, MAX235, MAX236, MAX237, MAX238, MAX239, MAX240, MAX241,MAX242, MAX243, MAX244, MAX245, MAX246, MAX247, MAX248, MAX249 +5V供电、多通道RS-232驱动器/接收器MAX2335 450MHz CDMA/OFDM LNA/混频器MAX2370 完备的、450MHz正交发送器MAX2370EVKIT MAX2370评估板MAX2980 电力线通信模拟前端收发器MAX2986 集成电力线数字收发器MAX3013 +1.2V至+3.6V、0.1μA、100Mbps、8路电平转换器MAX3205E, MAX3207E, MAX3208E 双路、四路、六路高速差分ESD保护ICMAX3301E, MAX3302E USB On-the-Go收发器与电荷泵MAX3344E, MAX3345E ±15kV ESD保护、USB收发器，UCSP封装，带有USB检测MAX3394E, MAX3395E, MAX3396E ±15kV ESD保护、大电流驱动、双/四/八通道电平转换器, 带有加速电路MAX3535E, MXL1535E +3V至+5V、提供2500VRMS隔离的RS-485/RS-422收发器，带有±15kV ESD保护MAX3570, MAX3571, MAX3573 HI-IF单芯片宽带调谐器MAX3643EVKIT MAX3643评估板MAX3645 +2.97V至+5.5V、125Mbps至200Mbps限幅放大器，带有信号丢失检测器MAX3645EVKIT MAX3645评估板MAX3654 47MHz至870MHz模拟CATV互阻放大器MAX3654EVKIT MAX3654评估板MAX3657 155Mbps低噪声互阻放大器MAX3658 622Mbps、低噪声、高增益互阻前置放大器MAX3735, MAX3735A 2.7Gbps、低功耗、SFP激光驱动器MAX3737 多速率激光驱动器，带有消光比控制MAX3737EVKIT MAX3737评估板MAX3738 155Mbps至2.7Gbps SFF/SFP激光驱动器，带有消光比控制MAX3744, MAX3745 2.7Gbps SFP互阻放大器，带有RSSIMAX3744EVKIT, MAX3745EVKIT MAX3744, MAX3745评估板MAX3748, MAX3748A, MAX3748B 紧凑的、155Mbps至4.25Gbps限幅放大器MAX3785 6.25Gbps、1.8V PC板均衡器MAX3787EVKIT MAX3787评估板MAX3793 1Gbps至4.25Gbps多速率互阻放大器，具有光电流监视器MAX3793EVKIT MAX3793评估板MAX3805 10.7Gbps自适应接收均衡器MAX3805EVKIT MAX3805评估板MAX3840 +3.3V、2.7Gbps双路2 x 2交叉点开关MAX3841 12.5Gbps CML 2 x 2交叉点开关MAX3967 270Mbps SFP LED驱动器MAX3969 200Mbps SFP限幅放大器MAX3969EVKIT MAX3969评估板MAX3982 SFP铜缆预加重驱动器MAX3983 四路铜缆信号调理器MAX3983EVKIT MAX3983评估板MAX3983SMAEVKIT MAX3983 SMA连接器评估板MAX4079 完备的音频/视频后端方案MAX4079EVKIT MAX4079评估板MAX4210, MAX4211 高端功率、电流监视器MAX4210EEVKIT MAX4210E、MAX4210A/B/C/D/F评估板MAX4211EEVKIT MAX4211A/B/C/D/E/F评估板MAX4397 用于双SCART连接器的音频/视频开关MAX4397EVKIT MAX4397评估系统/评估板MAX4411EVKIT MAX4411评估板MAX4729, MAX4730 低电压、3.5、SPDT、CMOS模拟开关MAX4754, MAX4755, MAX4756 0.5、四路SPDT开关，UCSP/QFN封装MAX4758, MAX4759 四路DPDT音频/数据开关，UCSP/QFN封装MAX4760, MAX4761 宽带、四路DPDT开关MAX4766 0.075A至1.5A、可编程限流开关MAX4772, MAX4773 200mA/500mA可选的限流开关MAX4795, MAX4796, MAX4797, MAX4798 450mA/500mA限流开关MAX4826, MAX4827, MAX4828, MAX4829, MAX4830, MAX4831 50mA/100mA限流开关, 带有空载标记, μDFN封装MAX4832, MAX4833 100mA LDO，带有限流开关MAX4834, MAX4835 250mA LDO，带有限流开关MAX4836, MAX4837 500mA LDO，带有限流开关MAX4838A, MAX4840A, MAX4842A 过压保护控制器，带有状态指示FLAGMAX4850, MAX4850H, MAX4852, MAX4852H 双路SPDT模拟开关，可处理超摆幅信号MAX4851, MAX4851H, MAX4853, MAX4853H 3.5/7四路SPST模拟开关，可处理超摆幅信号MAX4854 7四路SPST模拟开关，可处理超摆幅信号MAX4854H, MAX4854HL 四路SPST、宽带、信号线保护开关MAX4855 0.75、双路SPDT音频开关，具有集成比较器MAX4864L, MAX4865L, MAX4866L, MAX4867, MAX4865, MAX4866 过压保护控制器，具有反向保护功能MAX4880 过压保护控制器, 内置断路开关MAX4881, MAX4882, MAX4883, MAX4884 过压保护控制器, 内部限流, TDFN封装MAX4901, MAX4902, MAX4903, MAX4904, MAX4905 低RON、双路SPST/单路SPDT、无杂音切换开关, 可处理负电压MAX4906, MAX4906F, MAX4907, MAX4907F 高速/全速USB 2.0开关MAX5033 500mA、76V、高效率、MAXPower降压型DC-DC变换器MAX5042, MAX5043 双路开关电源IC，集成了功率MOSFET和热插拔控制器MAX5058, MAX5059 可并联的副边同步整流驱动器和反馈发生器控制ICMAX5058EVKIT MAX5051, MAX5058评估板MAX5062, MAX5062A, MAX5063, MAX5063A, MAX5064, MAX5064A, MAX5064B 125V/2A、高速、半桥MOSFET驱动器MAX5065, MAX5067 双相、+0.6V至+3.3V输出可并联、平均电流模式控制器MAX5070, MAX5071 高性能、单端、电流模式PWM控制器MAX5072 2.2MHz、双输出、降压或升压型转换器，带有POR和电源失效输出MAX5072EVKIT MAX5072评估板MAX5074 内置MOSFET的电源IC，用于隔离型IEEE 802.3af PD和电信电源MAX5078 4A、20ns、MOSFET驱动器MAX5084, MAX5085 65V、200mA、低静态电流线性稳压器, TDFN封装MAX5088, MAX5089 2.2MHz、2A降压型转换器, 内置高边开关MAX5094A, MAX5094B, MAX5094C, MAX5094D, MAX5095A, MAX5095B, MAX5095C 高性能、单端、电流模式PWM控制器MAX5128 128抽头、非易失、线性变化数字电位器, 采用2mm x 2mm μDFN封装MAX5417, MAX5417L, MAX5417M, MAX5417N, MAX5417P, MAX5418, MAX5419 256抽头、非易失、I2C接口、数字电位器MAX5417LEVKIT MAX5417_, MAX5418_, MAX5419_评估板/评估系统MAX5477, MAX5478, MAX5479 双路、256抽头、非易失、I2C接口、数字电位器MAX5478EVKIT MAX5477/MAX5478/MAX5479评估板/评估系统MAX5490 100k精密匹配的电阻分压器，SOT23封装MAX5527, MAX5528, MAX5529 64抽头、一次性编程、线性调节数字电位器MAX5820 双路、8位、低功耗、2线、串行电压输出DACMAX5865 超低功耗、高动态性能、40Msps模拟前端MAX5920 -48V热插拔控制器，外置RsenseMAX5921, MAX5939 -48V热插拔控制器，外置Rsense、提供较高的栅极下拉电流MAX5932 正电源、高压、热插拔控制器MAX5932EVKIT MAX5932评估板MAX5936, MAX5937 -48V热插拔控制器，可避免VIN阶跃故障，无需RSENSEMAX5940A, MAX5940B IEEE 802.3af PD接口控制器，用于以太网供电MAX5940BEVKIT MAX5940B, MAX5940D评估板MAX5941A, MAX5941B 符合IEEE 802.3af标准的以太网供电接口/PWM控制器，适用于用电设备MAX5945 四路网络电源控制器，用于网络供电MAX5945EVKIT, MAX5945EVSYS MAX5945评估板/评估系统MAX5953A, MAX5953B, MAX5953C, MAX5953D IEEE 802.3af PD接口和PWM控制器，集成功率MOSFETMAX6640 2通道温度监视器，提供双路、自动PWM风扇速度控制器MAX6640EVKIT MAX6640评估系统/评估板MAX6641 兼容于SMBus的温度监视器，带有自动PWM风扇速度控制器MAX6643, MAX6644, MAX6645 自动PWM风扇速度控制器，带有过温报警输出MAX6678 2通道温度监视器，提供双路、自动PWM风扇速度控制器和5个GPIOMAX6695, MAX6696 双路远端/本地温度传感器，带有SMBus串行接口MAX6877EVKIT MAX6877评估板MAX6950, MAX6951 串行接口、+2.7V至+5.5V、5位或8位LED显示驱动器MAX6966, MAX6967 10端口、恒流LED驱动器和输入/输出扩展器，带有PWM亮度控制MAX6968 8端口、5.5V恒流LED驱动器MAX6969 16端口、5.5V恒流LED驱动器MAX6970 8端口、36V恒流LED驱动器MAX6977 8端口、5.5V恒流LED驱动器，带有LED故障检测MAX6978 8端口、5.5V恒流LED驱动器，带有LED故障检测和看门狗MAX6980 8端口、36V恒流LED驱动器, 带有LED故障检测和看门狗MAX6981 8端口、36V恒流LED驱动器, 带有LED故障检测MAX7030 低成本、315MHz、345MHz和433.92MHz ASK收发器, 带有N分频PLLMAX7032 低成本、基于晶振的可编程ASK/FSK收发器, 带有N分频PLLMAX7317 10端口、SPI接口输入/输出扩展器，带有过压和热插入保护MAX7319 I2C端口扩展器，具有8路输入，可屏蔽瞬态检测MAX7320 I2C端口扩展器, 带有八个推挽式输出MAX7321 I2C端口扩展器，具有8个漏极开路I/O口MAX7328, MAX7329 I2C端口扩展器, 带有八个I/O口MAX7347, MAX7348, MAX7349 2线接口、低EMI键盘开关和发声控制器MAX7349EVKIT MAX7349评估板/仿真: MAX7347/MAX7348MAX7375 3引脚硅振荡器MAX7381 3引脚硅振荡器MAX7389, MAX7390 微控制器时钟发生器, 带有看门狗MAX7391 快速切换时钟发生器, 带有电源失效检测MAX7445 4通道视频重建滤波器MAX7450, MAX7451, MAX7452 视频信号调理器，带有AGC和后肩钳位MAX7452EVKIT MAX7452评估板MAX7462, MAX7463 单通道视频重建滤波器和缓冲器MAX8505 3A、1MHz、1%精确度、内置开关的降压型调节器，带有电源就绪指示MAX8524, MAX8525 2至8相VRM 10/9.1 PWM控制器，提供精密的电流分配和快速电压定位MAX8525EVKIT MAX8523, MAX8525评估板MAX8533 更小、更可靠的12V、Infiniband兼容热插拔控制器MAX8533EVKIT MAX8533评估板MAX8545, MAX8546, MAX8548 低成本、宽输入范围、降压控制器，带有折返式限流MAX8550, MAX8551 集成DDR电源方案，适用于台式机、笔记本电脑及图形卡MAX8550EVKIT MAX8550, MAX8550A, MAX8551评估板MAX8552 高速、宽输入范围、单相MOSFET驱动器MAX8553, MAX8554 4.5V至28V输入、同步PWM降压控制器，适合DDR端接和负载点应用MAX8563, MAX8564 ±1%、超低输出电压、双路或三路线性n-FET控制器MAX8564EVKIT MAX8563, MAX8564评估板MAX8566 高效、10A、PWM降压调节器, 内置开关MAX8570, MAX8571, MAX8572, MAX8573, MAX8574, MAX8575 高效LCD升压电路，可True ShutdownMAX8571EVKIT MAX8570, MAX8571, MAX8572, MAX8573, MAX8574, MAX8575评估板MAX8576, MAX8577, MAX8578, MAX8579 3V至28V输入、低成本、迟滞同步降压控制器MAX8594, MAX8594A 5路输出PMIC，提供DC-DC核电源，用于低成本PDAMAX8594EVKIT MAX8594评估板MAX8632 集成DDR电源方案，适用于台式机、笔记本电脑和图形卡MAX8632EVKIT MAX8632评估板MAX8702, MAX8703 双相MOSFET驱动器，带有温度传感器MAX8707 多相、固定频率控制器，用于AMD Hammer CPU核电源MAX8716, MAX8717, MAX8757 交叉工作、高效、双电源控制器，用于笔记本电脑MAX8716EVKIT MAX8716评估板MAX8717EVKIT MAX8717评估板MAX8718, MAX8719 高压、低功耗线性稳压器，用于笔记本电脑MAX8725EVKIT MAX8725评估板MAX8727 TFT-LCD升压型、DC-DC变换器MAX8727EVKIT MAX8727评估板MAX8729 固定频率、半桥CCFL逆变控制器MAX8729EVKIT MAX8729评估板MAX8732A, MAX8733A, MAX8734A 高效率、四路输出、主电源控制器，用于笔记本电脑MAX8737 双路、低电压线性稳压器, 外置MOSFETMAX8737EVKIT MAX8737评估板MAX8738 EEPROM可编程TFT VCOM校准器, 带有I2C接口MAX8740 TFT-LCD升压型、DC-DC变换器MAX8743 双路、高效率、降压型控制器，关断状态下提供高阻MAX8751 固定频率、全桥、CCFL逆变控制器MAX8751EVKIT MAX8751评估板MAX8752 TFT-LCD升压型、DC-DC变换器MAX8758 具有开关控制和运算放大器的升压调节器, 用于TFT LCDMAX8758EVKIT MAX8758评估板MAX8759 低成本SMBus CCFL背光控制器MAX8760 双相、Quick-PWM控制器，用于AMD Mobile Turion 64 CPU核电源MAX8764 高速、降压型控制器，带有精确的限流控制，用于笔记本电脑MAX9223, MAX9224 22位、低功耗、5MHz至10MHz串行器与解串器芯片组MAX9225, MAX9226 10位、低功耗、10MHz至20MHz串行器与解串器芯片组MAX9483, MAX9484 双输出、多模CD-RW/DVD激光二极管驱动器MAX9485 可编程音频时钟发生器MAX9485EVKIT MAX9485评估板MAX9486 8kHz参考时钟合成器，提供35.328MHz倍频输出MAX9486EVKIT MAX9486评估板MAX9489 多路输出网络时钟发生器MAX9500, MAX9501 三通道HDTV滤波器MAX9500EVKIT MAX9500评估板MAX9501EVKIT MAX9501评估板MAX9502 2.5V视频放大器, 带有重建滤波器MAX9504A, MAX9504B 3V/5V、6dB视频放大器, 可提供大电流输出MAX9701 1.3W、无需滤波、立体声D类音频功率放大器MAX9701EVKIT MAX9701评估板MAX9702 1.8W、无需滤波、立体声D类音频功率放大器和DirectDrive立体声耳机放大器MAX9702EVSYS/EVKIT MAX9702/MAX9702B评估系统/评估板MAX9703, MAX9704 10W立体声/15W单声道、无需滤波的扩展频谱D类放大器MAX9705 2.3W、超低EMI、无需滤波、D类音频放大器MAX9705BEVKIT MAX9705B评估板MAX9710EVKIT MAX9710评估板MAX9712 500mW、低EMI、无需滤波、D类音频放大器MAX9713, MAX9714 6W、无需滤波、扩频单声道/立体声D类放大器MAX9714EVKIT MAX9704, MAX9714评估板MAX9715 2.8W、低EMI、立体声、无需滤波、D类音频放大器MAX9715EVKIT MAX9715评估板MAX9716, MAX9717 低成本、单声道、1.4W BTL音频功率放大器MAX9716EVKIT MAX9716评估板MAX9718, MAX9719 低成本、单声道/立体声、1.4W差分音频功率放大器MAX9718AEVKIT MAX9718A评估板MAX9719AEVKIT MAX9719A/B/C/D评估板MAX9721 1V、固定增益、DirectDrive、立体声耳机放大器，带有关断MAX9721EVKIT MAX9721评估板MAX9722A, MAX9722B 5V、差分输入、DirectDrive、130mW立体声耳机放大器，带有关断MAX9722AEVKIT MAX9722A, MAX9722B评估板MAX9723 立体声DirectDrive耳机放大器, 具有BassMax、音量控制和I2C接口MAX9725 1V、低功率、DirectDrive、立体声耳机放大器，带有关断MAX9728AEVKIT MAX9728A/MAX9728B评估板MAX9750, MAX9751, MAX9755 2.6W立体声音频功放和DirectDrive耳机放大器MAX9759 3.2W、高效、低EMI、无需滤波、D类音频放大器MAX9759EVKIT MAX9759评估板MAX9770, MAX9772 1.2W、低EMI、无需虑波、单声道D类放大器，带有立体声DirectDrive耳机放大器MAX9787 2.2W立体声音频功率放大器, 提供模拟音量控制MAX9850 立体声音频DAC，带有DirectDrive耳机放大器MAX9890 音频咔嗒声-怦然声抑制器MAX9951, MAX9952 双路引脚参数测量单元MAX9960 双闪存引脚电子测量/高压开关矩阵MAX9961, MAX9962 双通道、低功耗、500Mbps ATE驱动器/比较器，带有2mA负载MAX9967 双通道、低功耗、500Mbps ATE驱动器/比较器，带有35mA负载MAX9986A SiGe高线性度、815MHz至1000MHz下变频混频器, 带有LO缓冲器/开关MAXQ2000 低功耗LCD微控制器MAXQ2000 勘误表PDF: MAXQ2000A2MAXQ2000-KIT MAXQ2000评估板MAXQ3120-KIT MAXQ3120评估板MXL1543B +5V、多协议、3Tx/3Rx、软件可选的时钟/数据收发器。

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(+3V ≤ VCC ≤ +5V, VEE = 0V, VCM = 0.5V, VOUT = 0.5V, TA = +25°C, unless otherwise noted.) CONDITIONS MAX473 VOS IB IOS VCM CMRR PSRR en High Low VEE ≤ VCM ≤ (VCC - 1.9V) VCC = 2.7V to 6.0V f = 10kHz 0.3V ≤ VOUT ≤ (VCC - 0.5V) Large-Signal Gain (Note 1) AVOL Sinking 5mA Sourcing 5mA Output Voltage Slew Rate Unity-Gain Bandwidth (Note 2) VOH VOL SR GBW RL = no load RL = 10kΩ RL = 600Ω VCC = 5V VCC = 3V VCC = 5V VCC = 3V VCC - 0.05 VEE + 0.05 15 10 17 12 10 94 82 80 80 VCC - 1.9 MAX474 MAX475 Current flows out of terminals 0 MIN TYP ±0.70 ±0.70 ±0.80 80 ±10 VCC - 1.7 VEE - 0.1 90 90 40 110 105 90 76 100 76 90 V V/µs MHz dB VEE MAX ±2.0 ±2.0 ±2.5 150 ±30 nA nA V dB dB nV/√Hz mV UNITS
元器件交易网
19-0260; Rev 1; 3/95
Single/Dual/Quad, 10MHz Single-Supply Op Amps
_______________General Description
The single MAX473, dual MAX474, and quad MAX475 are single-supply (2.7V to 5.25V), unity-gain-stable op amps with rail-to-rail output swing. Each op amp guarantees a 10MHz unity-gain bandwidth, 15V/µs slew rate, and 600Ω drive capability while typically consuming only 2mA supply current. In addition, the input range includes the negative supply rail and the output swings to within 50mV of each supply rail. Single-supply operation makes these devices ideal for low-power and low-voltage portable applications. With their fast slew rate and settling time, they can replace higher-current op amps in large-signal applications. The MAX473/MAX474/MAX475 are available in DIP and SO packages in the industry-standard op-amp pin configurations. The MAX473 and MAX474 are also offered in the µMAX package, the smallest 8-pin SO.
____________________________Features
o 15V/µs Min Slew Rate o +3V Single-Supply Operation o Guaranteed 10MHz Unity-Gain Bandwidth o 2mA Supply Current per Amplifier o Input Range Includes Negative Rail o Outputs Short-Circuit Protected o Rail-to-Rail Output Swing (to within ±50mV) o µMAX Package (the smallest 8-pin SO)
Call toll free 1-800-998-8800 for free samples or literature.
元器件交易网
Single/Dual/Quad, 10MHz Single-Supply Op Amps MAX473/MAX474/MAX475
ABSOLUTE MAXIMUM RATINGS
__________Typical Operating Circuit
9.9k
_________________Pin Configurations
TOP VIEW
9.9k
82pF
82pF
NULL IN-
1 2 3 4
MAX473
8 7 6 5
NULL VCC OUT N.C.
3V 3V 9.9k 9.9k VIN 100mVp-p
Supply Voltage (VCC - VEE)......................................................7V Input Voltage (IN+, IN-, IN_+, IN_-) .........................(VCC + 0.3V) to (VEE - 0.3V) Output Short-Circuit Duration.....................................Continuous Continuous Power Dissipation (TA = +70°C) 8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) ...727mW 8-Pin SO (derate 5.88mW/°C above +70°C)................471mW 8-Pin µMAX (derate 4.1mW/°C above +70°C) .............330mW 8-Pin CERDIP (derate 8.00mW/°C above +70°C)........640mW 14-Pin Plastic DIP (derate 10.00mW/°C above +70°C)...800mW 14-Pin SO (derate 8.33mW/°C above +70°C)..............667mW 14-Pin CERDIP (derate 9.09mW/°C above +70°C)......727mW Operating Temperature Ranges MAX47_C_ _ ......................................................0°C to +70°C MAX47_E_ _.....................................................-40°C to +85°C MAX47_MJ_ ...................................................-55°C to +125°C Junction Temperatures MAX47_C_ _/E_ _........................................................ +150°C MAX47_MJ_ ................................................................ +175°C Storage Temperature Range .............................-65°C to +160°C Lead Temperature (soldering, 10sec) .............................+300°C
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Not Recommended for New Designs
This product was manufactured for Maxim by an outside wafer foundry using a process that is no longer available. It is not recommended for new designs. The data sheet remains available for existing users. A Maxim replacement or an industry second-source may be available. Please see the QuickView data sheet for this part or contact technical support for assistance. For further information, contact Maxim’s Applications Tech Support.
________________________Applications
Portable Equipment Battery-Powered Instruments Signal Processing Discrete Filters Signal Conditioning Servo-Loops