MAX1224ETC中文资料
MAX1214EVKIT中文资料
General DescriptionThe MAX1213/MAX1214/MAX1215 evaluation kits (EV kits) are a fully assembled and tested circuit board that contains all the components necessary to evaluate the performance of the MAX1213/MAX1214/MAX1215 ana-log-to-digital converters (ADCs). The MAX1213/MAX1214/MAX1215 accept differential analog inputs;however, the EV kits generate this signal from a user-provided single-ended signal source. The digital out-puts produced by the ADC can be easily captured with a user-provided high-speed logic analyzer or data-acquisition system. The EV kits operate from 1.8V power supplies and includes circuitry that generates a clock signal from a user-provided AC signal.Featureso Up to 170Msps/210Msps/250Msps Sampling Rate o Low-Voltage and Low-Power Operation o Fully Differential Signal Input Configuration o On-Board Differential Output Drivers o Fully Assembled and TestedEvaluate: MAX1213/MAX1214/MAX1215MAX1213/MAX1214/MAX1215 Evaluation Kits19-3408; Rev 1; 4/05For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .Ordering Information*EP = Exposed pad.E v a l u a t e : M A X 1213/M A X 1214/M A X 1215MAX1213/MAX1214/MAX1215 Evaluation Kits 2_______________________________________________________________________________________Note :Indicate that you are using the MAX1213/MAX1214/MAX1215 when contacting these component suppliers.Quick StartRecommended Equipment•DC power supplies:Analog (VCC) 1.8V, 1A Clock (VCLK) 3.3V, 200mA Buffers (VLPEL) 3.3V, 400mA•Signal generator with low-phase noise and low jitter for clock input (e.g., HP 8662A, HP 8644B)•Signal generator for analog signal input (e.g., H P 8662A, HP 8644B)•Logic analyzer or data-acquisition system (e.g., H P 16500C with high-speed state card HP 16517A)•Digital voltmeterProcedureThe MAX1213/MAX1214/MAX1215 EV kits are a fully assembled and tested surface-mount board. Follow the steps below for board operation. Do not turn on power supplies or enable signal generators until all connec-tions are completed:1)Verify that shunts are installed in the following locations:JU2 (1-2) →divide-by-two disabledJU3 (2-3) →two ’s-complement output selected J3 (3-4) →internal reference enabled2)Connect the clock signal generator to the SMA connector labeled CLK.3)Connect the analog input signal generator to the SMA connector labeled J1.4)Connect the logic analyzer with high-speed card probe to either headers J4/J5 (LVDS-compatible signals) or J6/J7 (LVPECL-compatible signals).See Table 4 for header connections.5)Connect a 1.8V, 1A power supply to VCC.Connect the ground terminal of this supply to GND closest to the VCC pad.6)Connect a 3.3V, 200mA power supply to VCLK.Connect the ground terminal of this supply to GND closest to the VCLK pad.7)Connect a 3.3V, 400mA power supply to VLPEL.Connect the ground terminal of this supply to GND closest to the VLPEL pad.Component SuppliersComponent List (continued)8)Turn on all power supplies.9)Enable the signal generators. Set the clock signal generator to output a 170MH z/210MH z/250MH z signal, with an amplitude of 2.4V P-P . Set the ana-log input signal generator to output the desired fre-quency with an amplitude ≤2V P-P . The signal gen-erators should be synchronized.10)Enable the logic analyzer.11)Collect data using the logic analyzer.Detailed DescriptionThe MAX1213/MAX1214/MAX1215 EV kits are a fully assembled and tested circuit board that contains all the components necessary to evaluate the performance of the MAX1213/MAX1214/MAX1215, 12-bit LVDS output ADCS. The MAX1213/MAX1214/MAX1215 can be eval-uated with a maximum clock frequency (f CLK ) of 170MHz/210MHz/250MHz .The MAX1213/MAX1214/MAX1215 accept differential inputs. Applications that only have a single-ended sig-nal source available can use the on-board transformer (T2) to convert the singled-ended signal to a differential signal.Output level translators (U3–U6) buffer and convert the LVDS output signals of the MAX1213/MAX1214/MAX1215 to higher voltage LVPECL signals that can be captured by a wide variety of logic analyzers. The LVDS outputs are accessed at headers J4 and J5. The LVPECL outputs are accessed at headers J6 and J7.The EV kits are designed as a four-layer PC board to optimize the performance of the MAX1213/MAX1214/MAX1215. Separate analog, clock, and buffer power planes minimize noise coupling between analog and digital signals; 50Ωcoplanar transmission lines are used for analog and clock inputs and 100Ωdifferential coplanar transmission lines are used for all digital LVDS outputs. All LVDS differential outputs are properly termi-nated with 100Ωtermination resistors between true and complementary digital outputs. The trace lengths of the 100Ωdifferential LVDS lines are matched to within a few thousandths of an inch to minimize layout-depen-dent delays.Power SuppliesThe MAX1213/MAX1214/MAX1215 EV kits require sep-arate analog, clock, and buffer power supplies for best performance. A 1.8V power supply is used to power the analog and digital portion of the MAX1213/MAX1214/MAX1215. The on-board clock circuitry is powered by a 3.3V power supply. A separate 3.3V power supply is used to power the output buffers (U3–U6) on the EV kit.ClockThe MAX1213/MAX1214/MAX1215 require a differential clock signal. However, if only a single-ended clock sig-nal source is available, the EV kit ’s on-board level translator helps to convert a singled-ended clock signal to the required differential signal. An on-board clock-shaping circuit generates a differential clock signal from an AC sine-wave signal applied to the clock input SMA connector (CLK). The input signal should not exceed an amplitude of 2.6V P-P . The frequency of the sinusoidal input clock signal determines the sampling frequency (f CLK ) of the ADC. A differential line receiver (U2) processes the input signal to generate the required clock signal. The frequency of the clock signalshould not exceed 170MHz/210MHz/250MHz.Clock DividerThe MAX1213/MAX1214/MAX1215 feature an inter-nal divide-by-two clock divider. Use jumper JU2to enable/disable this feature. See Table 1 for shunt positions.Input SignalThe MAX1213/MAX1214/MAX1215 accept differential analog input signals. However, the EV kits only require a single-ended analog input signal with an amplitude of less than 2V P-P provided by the user. An on-board transformer then takes the single-ended analog input and generates a differential analog signal, which is applied to the ADC ’s differential input pins.Optional Input TransformerThe MAX1213/MAX1214/MAX1215 EV kits use a sec-ond transformer to enhance TH D and SFDR perfor-mance at high input frequencies (>100MH z). This transformer helps to reduce the increase of even-order harmonics at high frequencies. To use only the primary transformer, follow the directions below:1)Remove R10 and R12.2)Install a 0.1µF capacitor on C14.3)Connect the analog signal source to J2 instead of J1.Evaluate: MAX1213/MAX1214/MAX1215MAX1213/MAX1214/MAX1215 Evaluation Kits_______________________________________________________________________________________3Table 1. Clock-Divider Shunt Settings (JU2)E v a l u a t e : M A X 1213/M A X 1214/M A X 1215Reference VoltageThere are two methods to set the full-scale range of the MAX1213/MAX1214/MAX1215. The MAX1213/MAX1214/MAX1215 EV kits can be configured to use the ADC ’s internal reference, or a stable, low-noise,external reference can be applied to the REFIO pad.Jumper J3 controls which reference source is used.See Table 2 for shunt settings.The MAX1213/MAX1214/MAX1215 feature a single 12-bit, parallel, LVDS-compatible, digital output bus. The digital outputs also feature a clock bit (DCOP/N) for data synchronization, and a data overrange bit (ORP/N). See Table 4 for header connections.Output FormatThe digital output coding can be chosen to be either in two ’s complement or straight offset binary format by configuring jumper JU3. See Table 3 for shunt settings.Output Bit LocationsThe digital outputs of the ADC are connected to two 40-pin headers (J4 and J5). PC board trace lengths are matched to minimize output skew and improve perfor-mance of the device. In addition, four drivers (U3–U6)buffer and level translate the ADC ’s digital outputs to LVPECL-compatible signals. The drivers increase the differential voltage swing and are able to drive large capacitive loads, which may be present at the logic analyzer connection. The outputs of the buffers are connected to two 40-pin headers (J6 and J7). See Table 4 for headers J4–J7 bit locations.MAX1213/MAX1214/MAX1215 Evaluation Kits 4_______________________________________________________________________________________Table 3. Output-Format Shunt Settings (JU3)Evaluate: MAX1213/MAX1214/MAX1215MAX1213/MAX1214/MAX1215 Evaluation Kits_______________________________________________________________________________________5Table 4. Output Bit LocationsE v a l u a t e : M A X 1213/M A X 1214/M A X 1215MAX1213/MAX1214/MAX1215 Evaluation Kits 6_______________________________________________________________________________________Figure 1. MAX1213/MAX1214/MAX1215 EV Kit Schematic (Sheet 1 of 2)Evaluate: MAX1213/MAX1214/MAX1215MAX1213/MAX1214/MAX1215 Evaluation Kits_______________________________________________________________________________________7Figure 1. MAX1213/MAX1214/MAX1215 EV Kit Schematic (Sheet 2 of 2)E v a l u a t e : M A X 1213/M A X 1214/M A X 1215MAX1213/MAX1214/MAX1215 Evaluation Kits 8_______________________________________________________________________________________Figure 2. MAX1213/MAX1214/MAX1215 EV Kit Component Placement Guide—Component SideEvaluate: MAX1213/MAX1214/MAX1215MAX1213/MAX1214/MAX1215 Evaluation Kits_______________________________________________________________________________________9Figure 3. MAX1213/MAX1214/MAX1215 EV Kit PC Board Layout—Component SideE v a l u a t e : M A X 1213/M A X 1214/M A X 1215MAX1213/MAX1214/MAX1215 Evaluation Kits 10______________________________________________________________________________________Figure 4. MAX1213/MAX1214/MAX1215 EV Kit PC Board Layout—Ground Plane (Layer 2)Evaluate: MAX1213/MAX1214/MAX1215MAX1213/MAX1214/MAX1215 Evaluation Kits ______________________________________________________________________________________11Figure 5. MAX1213/MAX1214/MAX1215 EV Kit PC Board Layout—Power Plane (Layer 3)Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.12____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600©2005 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc.E v a l u a t e : M A X 1213/M A X 1214/M A X 1215MAX1213/MAX1214/MAX1215 Evaluation KitsFigure 6. MAX1213/MAX1214/MAX1215 EV Kit PC Board Layout—Solder Side。
MAXIMDALLAS中文数据资料
MAX13000E, 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ADC
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
DS3906 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: 80C410A1
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
DS1982, DS1982-F3, DS1982-F5 1k位只添加iButton?
DS1990A 序列号iButton
MAX742中文资料
MAX742
CC-
+5V INPUT
+2.0V VREF
R -SENSE
PWM
S -DRIVE
P
-VO
OSC +VO
S +DRIVE
N
PWM
R +SENSE
CC+
________________________________________________________________ Maxim Integrated Products 1
Operating Temperature Ranges MAX742C_ _ .......................................................0°C to +70°C MAX742E_ _ ....................................................-40°C to +85°C MAX742MJP ..................................................-55°C to +125°C
R1224N332H中文资料
Designation of Optional Function E : 300kHz, with a PWM/VFM alternative circuit F : 500kHz, with a PWM/VFM alternative circuit G : 300kHz, without a PWM/VFM alternative circuit H : 500kHz, without a PWM/VFM alternative circuit L : 180kHz, with a PWM/VFM alternative circuit M :180kHz, without a PWM/VFM alternative circuit
In the R1224N Series, the output voltage, the oscillator frequency, the optional function, and the taping type for the ICs can be selected at the user's request.
The selection can be made with designating the part number as shown below;
R1224Nxx2x-xx-x ←Part Number
↑ ↑ ↑↑ ↑ ↑ a b cd e f
Code a b c
d
e f
Contents
Designation of Package Type; N: SOT-23-5
Typ. 300kHz (R1224Nxx2E/G, R1224N102G) Typ. 500kHz (R1224Nxx2F/H, R1224N102H) • Efficiency......................................................................... Typ. 90% • Low Temperature-Drift Coefficient of Output Voltage...... Typ. ±100ppm/°C • Package .......................................................................... SOT-23-5 • Built-in Soft-start Function............................................... Typ. 10ms • Built-in Current Limit Circuit
MAX1225ETC-T中文资料
ESM4C1224C07资料
Applications•Medical and dental equipment •Test and measurement•Chemical analysis equipment •Drug infusion equipment •Peripherals DescriptionFeatures•EN60601-1, UL2601-1, IEC601-1 approved •12mm creepage•Low leakage current <300 µA•Stackable for up to 2000W output power •1 to 12 isolated outputs with full user configurability•Isolated bias supply voltage 5V @ 50mA •Class B conducted emissions (ESM6)•400, 600, and 1000 watts of output power •Series and parallel capability •EN61000-3-2 compliant•Individual control signals on each module •2-year warrantyThe ESM4 and ESM6 series of modular AC/DC power supplies provide quick-turn-around, cost-effective power solutions for medical applications from 400 to 1000 watts. Low leakage currents, under 300 µA (consult factory for leakage currents under 150 µA), combined with conformance to IEC601-1 isolation and spacing requirements make these products ideal power sources for applications such as blood analyzers, DNA sequencers, and MRI and CAT scanners.The ESM4 Series is available in 400 and 600 watt configurations, both providing up to eight outputs from 2.56" x 5"x 10.63" (65 x 127 x 270mm) chassis. The ESM6 Series is available in 600 and 1000 watt versions, both providing up to twelve outputs from 2.56" x 7.36" x 10.63" (65 x 187 x 270mm) packages. Five single-output and two dual-output modules can be configured in series or parallel to provide outputs from 1.45 to 58VDC.Specification All specifications are typical at nominal input, full load at 25°C unless otherwise stated.Output SpecificationsMaximum power Input module B (for 4 slot only)400WInput module C (for 4 & 6 slot)600WInput module D (for 6 slot only)1000W(1) Output adjustment(Note 2)Multi-turn potentiometer Line regulation±0.1% Load regulation50% load change±0.2% Cross regulation±0.2% typ. Transient response(Note 3)<10%, <0.5ms Temperature coefficient±0.02%/°C Ripple and noise(Note 4) 1.0% or100mV pk-pk Overvoltage protection Standard on all outputs Overcurrent protection(Note 5)Individual current limit Thermal protection Standard Mains failure signal Option 06 or 075ms warning Output isolation(Note 6)Each single and dualoutput fully floating Margin See application note for individualmodule margin capabilitiesMinimum load(Note 7)Zero Turn-on delay500ms Remote sense Single output modules only0.5V drop Input SpecificationsInput voltage range Universal input88 to 264VAC125 to 370VDC Input frequency range(Note 8)47Hz to 63Hz Inrush current230VAC @ 25°C50A max. Harmonic distortion(Power factor)EN61000-3-2NOTES11000W peak power for 10s at low line. 800W average power for input voltage less than 180VAC.2Outputs are user adjustable or factory set to your requested voltage. 325% to 75% load change.4Whichever is greater. 20MHz bandwidth. (See application note for specification below 0°C).5Straight line on all outputs. On Module 70 current limit adjustable from 50% to 110%. Optional foldback on Module 70 or contact factory fordetails see application note.EMC CharacteristicsEmissions:EN55022, FCCConducted ESM4B & ESM4C Level AESM6C & ESM6D Level B Immunity:Electrostatic discharge EN61000-4-2Level 4 Radiated RFI EN61000-4-3Level 3 Fast transients - burst EN61000-4-4Level 3 Input line surges EN61000-4-5Class 3 Conducted RFI EN61000-4-6Level 3 Voltage dips EN61000-4-11Compliant General SpecificationsHold-up time(Note 9)20ms typ after loss of AC power Efficiency82% typ. Isolation voltage Input/output4000VACInput/chassis1500VAC Switching frequency200kHz Approvals and(Note 11)IEC60950, UL1950 standards CSA22.2 No. 950 Leakage current<300µA, 250VAC, 60Hz Weight ESM4B, ESM4C 2.5kgESM6C, ESM6D 3.5kg Size See mechanical specifications MTBF See application note400,000 hours Environmental SpecificationsOperating temperature See application note-20°C to +50°C (See derating curve)Derate 2.5% per °Cup to +70°C Storage temperature-40°C to +85°C Relative humidity Non-condensing5% to 95% RH Shock3000 bumps, 10G (16ms) half sine Vibration10-200Hz, 1.5G6100V isolation between each output and 500V to chassis.7All outputs except Module 70, which has 5.0% minimum load for full specification.8Contact factory for 400Hz operation.9For nominal output voltages and full load.10The specifications contained in this data sheet are believed to be correct at time of publication. Specifications are subject to change without notice.11This product is not intended for use as a stand alone unit and must be installed by authorized personnel in order to maintain approvals.Mechanical DrawingUse 0 for unfilled slotsESP/ESM Standard Options06Mains Power Fail + Global Enable + Bias Supply Voltage 07Mains Power Fail + Global Inhibit + Bias Supply VoltageOutput SignalsOutput control signals are available on all output modules.(see application note)Modules 1 to 6Module 70 Additional Features • Power good signal •Adjustable Current Limit•Output inhibit signal •Foldback or Straight Line Current Limiting •Remote adjust (margin)•Bias Voltage•Selectable Output Inhibit or EnableDual output modules:Output signals available on first [top] output only.How to Order ESM4(Available in 400/600 Watt Versions)Note:Calculate power requirements by summing output powers calculated at application output voltages.Note:Calculate power requirements by summing output powers calculated at application output voltages.For ESM6D:Limit total power from slots A-C and D-E to 550W each.How to Order ESM6Series Slot A Slot BSeries Power Slot A Slot BSpecification of power supply detailed above:• 4-slot series• Maximum output power: 600W• 5V @ 30A; 12V @ 20A; 24V @ 3A; 24V @ 3A• Mains Power Fail signal + Logic Inhibit + Bias Supply VoltageSpecification of power supply detailed above:• 6-slot series• Maximum output power: 1000W• 5V @ 30A; 12V @ 20A; 12V @ 20A; 24V @ 12A; 24V @ 12A; 24V @ 3A; 24V @ 3A • Mains Power Fail signal + Logic Inhibit + Bias Supply Voltage Production Configuration:Units are shipped with nominal output voltages unless special con-figuration is specified. Power-One can configure to your exact requirements through use of appropriate series and parallel busbars,and voltage adjustment to specific set points.ESM FlexibilityMaximum current = (I1+ I2) x .9 Use two parallel links Maximum voltage to chassis is 500VUse series linkReverse bias diodes may be required for certainapplications, eg. large capacitive loadsNotes:Where the sensing point is remote from theoutput of the power supply, to avoid spuriousnoise pick-up it may be necessary to:1Use twisted pair sense wires.2Use R C as shown(R1= 100W) (R2= 10W)(C = 22µF).Notes:See application note for full details.NUCLEAR AND MEDICAL APPLICATIONS - Power-One products are not authorized for use as critical components in life support systems, equipment used in hazardous environments, or nuclear control systems without the express written consent of the respective divisional president of Power-One, Inc.TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on the date manufactured. Specifications are subject to change without notice.。
研华EKI-1224配置说明
2.1.1 协议简介 .................................................6
图 2.1： Modbus 系统架构 1...............................7
图 2.2： Modbus 系统架构 2...............................7
2.1.2 Modbus RTU ...............................................7
2.1.3 Modbus ASCII .............................................8
表 2.1： Modbus RTU 和 ASCII 模式比较 ....................8
2.3.3 串行设备连接 ............................................17
图 2.19： EKI-1221/1222/1224 串行端口针脚分配 ...........17
表 2.3： EKI-1221/1222/1224 串行针脚分配 ...............17
Material Authorization) 序列号。这可以让我们尽快地进行故障产品的回收。 4. 请仔细地包装故障产品，并在包装中附上完整的售后服务卡片和购买日期证明
（如销售发票）。我们对无法提供购买日期证明的产品不提供质量保证服务。 5. 把相关的 RMA 序列号写在外包装上，并将其运送给销售人员。
2.3.1 选择位置 ................................................15
图 2.15： 安装金属支架套件..............................15
MAX1724EZK27+中文资料
Selector Guide
PART MAX1722EZK MAX1723EZK MAX1724EZK27 MAX1724EZK30 OUTPUT (V) Adjustable Adjustable Fixed 2.7 Fixed 3.0 Fixed 3.3 Fixed 5.0 SHDN No Yes Yes Yes Yes Yes LX DAMPING Yes No Yes Yes Yes Yes
Applications
Pagers Remote Controls Remote Wireless Transmitters Personal Medical Devices Digital Still Cameras Single-Cell BatteryPowered Devices Low-Power Hand-Held Instruments MP3 Players Personal Digital Assistants (PDA)
MAX1722/MAX1723/MAX1724
Ordering Information
PART MAX1722EZK-T MAX1723EZK-T MAX1724EZK27-T MAX1724EZK30-T MAX1724EZK33-T MAX1724EZK50-T TEMP. RANGE -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C PINPACKAGE 5 SOT23 5 SOT23 5 SOT23 5 SOT23 5 SOT23 5 SOT23 TOP MARK ADQF ADQG ADQH ADQI ADQJ ADQK
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AIN+ AIN-
MAX1224 MAX1225Βιβλιοθήκη MAX1224 MAX1225
REF 4.7µF 0.01µF REF RGND
µC/DSP CNVST SCLK
4 VDD
5 N.C.
6 GND
GND
TQFN SPI/QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp.
ELECTRICAL CHARACTERISTICS
(VDD = +2.7V to +3.6V, VL = VDD, VREF = 2.048V, fSCLK = 24.0MHz, 50% duty cycle, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDD = 3V and TA = +25°C.)
元器件交易网
1.5Msps, Single-Supply, Low-Power, True-Differential, 12-Bit ADCs MAX1224/MAX1225
ABSOLUTE MAXIMUM RATINGS
VDD to GND ..............................................................-0.3V to +6V VL to GND ................-0.3V to the lower of (VDD + 0.3V) and +6V Digital Inputs to GND .................-0.3V to the lower of (VDD + 0.3V) and +6V Digital Output to GND ....................-0.3V to the lower of (VL + 0.3V) and +6V Analog Inputs and REF to GND..........-0.3V to the lower of (VDD + 0.3V) and +6V RGND to GND .......................................................-0.3V to +0.3V Maximum Current into Any Pin............................................50mA Continuous Power Dissipation (TA = +70°C) 12-Pin TQFN (derate 16.9mW/°C above +70°C) ......1349mW Operating Temperature Ranges MAX127_ CTC ...................................................0°C to +70°C MAX127_ ETC.................................................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-60°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C
Features
MAX1224/MAX1225
Ordering Information
PART MAX1224CTC-T MAX1224ETC-T MAX1225CTC-T MAX1225ETC-T TEMP RANGE 0°C to +70°C 0°C to +70°C PINPACKAGE 12 TQFN-12 12 TQFN-12 INPUT Unipolar Unipolar Bipolar Bipolar
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at .
TOP VIEW
AIN+ 12 N.C. 11 SCLK 10
10µF +2.7V TO +3.6V
Typical Operating Circuit
+1.8V TO VDD
0.01µF VDD
0.01µF VL DOUT
10µF
AINREF RGND
1 2 3
9 8 7
CNVST DOUT VL
DIFFERENTIAL + INPUT VOLTAGE -
元器件交易网
19-3271; Rev 0; 5/04
1.5Msps, Single-Supply, Low-Power, True-Differential, 12-Bit ADCs
General Description
The MAX1224/MAX1225 low-power, high-speed, serialoutput, 12-bit, analog-to-digital converters (ADCs) operate at up to 1.5Msps. These devices feature true-differential inputs, offering better noise immunity, distortion improvements, and a wider dynamic range over singleended inputs. A standard SPI™/QSPI™/MICROWIRE™ interface provides the clock necessary for conversion. These devices easily interface with standard digital signal processor (DSP) synchronous serial interfaces. The MAX1224/MAX1225 operate from a single +2.7V to +3.6V supply voltage and require an external reference. The MAX1224 has a unipolar analog input, while the MAX1225 has a bipolar analog input. These devices feature a partial power-down mode and a full power-down mode for use between conversions, which lower the supply current to 1mA (typ) and 1µA (max), respectively. Also featured is a separate power-supply input (VL), which allows direct interfacing to +1.8V to VDD digital logic. The fast conversion speed, low-power dissipation, good AC performance, and DC accuracy (±1.5 LSB INL) make the MAX1224/MAX1225 ideal for industrial process control, motor control, and base-station applications. The MAX1224/MAX1225 come in a 12-pin TQFN package, and are available in the commercial (0°C to +70°C) and extended (-40°C to +85°C) temperature ranges. ♦ 1.5Msps Sampling Rate ♦ Only 18mW (typ) Power Dissipation ♦ Only 1µA (max) Shutdown Current ♦ High-Speed, SPI-Compatible, 3-Wire Serial Interface ♦ 69dB S/(N + D) at 525kHz Input Frequency ♦ Internal True-Differential Track/Hold (T/H) ♦ External Reference ♦ No Pipeline Delays ♦ Small 12-Pin TQFN Package
PARAMETER DC ACCURACY Resolution Relative Accuracy Differential Nonlinearity Offset Error Offset-Error Temperature Coefficient Gain Error Gain Temperature Coefficient DYNAMIC SPECIFICATIONS (fIN = 525kHz sine wave, VIN = VREF, unless otherwise noted.) Signal-to-Noise Plus Distortion Total Harmonic Distortion Spurious-Free Dynamic Range Intermodulation Distortion Full-Power Bandwidth Full-Linear Bandwidth CONVERSION RATE Minimum Conversion Time Maximum Throughput Rate Minimum Throughput Rate Track-and-Hold Acquisition Time Aperture Delay Aperture Jitter External Clock Frequency fSCLK (Note 6) (Note 7) tACQ (Note 4) (Note 5) tCONV (Note 3) 1.5 10 125 5 30 24.0 0.667 µs Msps ksps ns ns ps MHz SINAD THD SFDR IMD fIN1 = 250kHz, fIN2 = 300kHz -3dB point S/(N + D) > 68dB, single ended Up to the 5th harmonic 66 69 -80 -83 -78 15 1.2 -76 -76 dB dB dB dB MHz MHz Offset nulled ±2 ±1 ±6.0 INL DNL (Note 1) Guaranteed no missing codes (Note 2) 12 -1.5 -1.0 +1.5 +1.5 ±8.0 Bits LSB LSB LSB ppm/°C LSB ppm/°C SYMBOL CONDITIONS MIN TYP MAX UNITS