MAX4014EUK-T中文资料

_______________General DescriptionThe MAX4014/MAX4017/MAX4019/MAX4022 are preci-sion, closed-loop, gain of +2 (or -1) buffers featuring high slew rates, high output current drive, and low dif-ferential gain and phase errors. These single-supply devices operate from +3.15V to +11V, or from ±1.575V to ±5.5V dual supplies. The input voltage range extends 100mV beyond the negative supply rail and the outputs swing Rail-to-Rail ®.These devices require only 5.5mA of quiescent supply current while achieving a 200MHz -3dB bandwidth and a 600V/µs slew rate. I n addition, the MAX4019 has a disable feature that reduces the supply current to 400µA. I nput voltage noise for these parts is only 10nV/√Hz and input current noise is only 1.3pA/√Hz .This buffer family is ideal for low-power/low-voltage applications that require wide bandwidth, such as video, communications, and instrumentation systems.For space-sensitive applications, the MAX4014 comes in a tiny 5-pin SOT23 package.________________________ApplicationsPortable/Battery-Powered Instruments Video Line DriverAnalog-to-Digital Converter Interface CCD Imaging SystemsVideo Routing and Switching Systems____________________________Featureso Internal Precision Resistors for Closed-Loop Gains of +2 or -1o High Speed:200MHz -3dB Bandwidth30MHz 0.1dB Gain Flatness (6MHz min)600V/µs Slew Rate o Single 3.3V/5.0V Operation o Outputs Swing Rail-to-Railo Input Voltage Range Extends Beyond V EE o Low Differential Gain/Phase: 0.04%/0.02°o Low Distortion at 5MHz:-78dBc Spurious-Free Dynamic Range -75dB Total Harmonic Distortion o High Output Drive: ±120mA o Low, 5.5mA Supply Current o 400µA Shutdown Supply Currento Space-Saving SOT23-5, µMAX, or QSOP PackagesMAX4014/MAX4017/MAX4019/MAX4022Low-Cost, High-Speed, Single-Supply, Gain of +2Buffers with Rail-to-Rail Outputs in SOT23__________Typical Operating Circuit19-1284; Rev 2; 8/01_____________________Selector GuideRail-to-Rail is a registered trademark of Nippon Motorola Ltd.________________________________________________________________Maxim Integrated Products 1For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .M A X 4014/M A X 4017/M A X 4019/M A X 4022Low-Cost, High-Speed, Single-Supply, Gain of +2 Buffers with Rail-to-Rail Outputs in SOT232_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSDC ELECTRICAL CHARACTERISTICS(V CC = +5V, V EE = 0V, IN_- =0V, EN_ = 5V, R L = ∞to ground, V OUT = V CC / 2, noninverting configuration, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Note 1)Supply Voltage (V CC to V EE )..................................................12V IN_-, IN_+, OUT_, EN_ ....................(V EE - 0.3V) to (V CC + 0.3V)Output Short-Circuit Duration to V CC or V EE ..............Continuous Continuous Power Dissipation (T A = +70°C)5-pin SOT23 (derate 7.1mW/°C above+70°C)..............571mW 8-pin SO (derate 5.9mW/°C above +70°C)...................471mW8-pin µMAX (derate 4.1mW/°C above +70°C)..............330mW 14-pin SO (derate 8.3mW/°C above +70°C).................667mW 16-pin QSOP (derate 8.3mW/°C above +70°C)............667mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10sec).............................+300°CStresses 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 at 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.MAX4014/MAX4017/MAX4019/MAX4022Low-Cost, High-Speed, Single-Supply, Gain of +2Buffers with Rail-to-Rail Outputs in SOT23_______________________________________________________________________________________3Note 1:The MAX4014EUK is 100% production tested at T A = +25°C. Specifications over temperature limits are guaranteed bydesign.Note 2:Tested with V OUT = +2.5V.Note 3: PSRR for single +5V supply tested with V EE = 0V, V CC = +4.5V to +5.5V; for dual ±5V supply with V EE = -4.5V to -5.5V,V CC = +4.5V to +5.5V; and for single +3V supply with V EE = 0V, V CC = +3.15V to +3.45V.Note 4:Guaranteed by design.AC ELECTRICAL CHARACTERISTICS(V CC = +5V, V EE = 0V, I N_- = 0V, EN_ = 5V, R L = 100Ωto ground, noninverting configuration, T A = T MIN to T MAX,unless otherwise noted. Typical values are at T A = +25°C.)M A X 4014/M A X 4017/M A X 4019/M A X 4022Low-Cost, High-Speed, Single-Supply, Gain of +2 Buffers with Rail-to-Rail Outputs in SOT234_______________________________________________________________________________________81100k1M10M 100M1G SMALL-SIGNAL GAIN vs. FREQUENCY3M A X 4014-01FREQUENCY (Hz)G A I N (d B )57246 6.86.75.9100k 1M 10M 100M 1GGAIN FLATNESS vs. FREQUENCYM A X 4014-02FREQUENCY (Hz)G A I N (d B )6.06.26.56.66.16.46.36780100k1M10M 100M1GLARGE-SIGNAL GAIN vs. FREQUENCY3M A X 4014-03FREQUENCY (Hz)G A I N (d B )521450-150100k1M10M 100M1GMAX4017/19/22CROSSTALK vs. FREQUENCY-110M A X 4014-04FREQUENCY (Hz)C R O S S T A L K (d B )-70-301030-130-90-50-100-10-20-30-60-70-90-80-40-50-100LOAD (Ω)2004006008001000HARMONIC DISTORTIONvs. LOADH A R M O N I C D I S T O R T I O N (d B c )10000.10.1M1M10M100MCLOSED-LOOP OUTPUT IMPEDANCEvs. FREQUENCYM A X 4014-05FREQUENCY (Hz)I M P E D A N C E (Ω)100110-100100k1M10M100MHARMONIC DISTORTION vs. FREQUENCY-80FREQUENCY (Hz)H A R M O N I C D I S T O R T I O N (d B c )-60-40-20-10-90-70-50-300-10-20-30-60-70-90-80-40-50-100OUTPUT SWING (Vp-p)0.51.0 1.52.0HARMONIC DISTORTION vs. OUTPUT SWINGH A R M O N I C D I S T O R T I O N (d B c )10-90100k10M100M1MMAX4019OFF ISOLATION vs. FREQUENCY-80M A X 4014-09FREQUENCY (Hz)O F F I S O L A T I O N (d B )-70-60-50-40-30-20-100 __________________________________________Typical Operating Characteristics(V CC = +5V, V EE = 0V, A VCL = +2, R L = 150Ωto V CC / 2, T A = +25°C, unless otherwise noted.)MAX4014/MAX4017/MAX4019/MAX4022Low-Cost, High-Speed, Single-Supply, Gain of +2Buffers with Rail-to-Rail Outputs in SOT23_______________________________________________________________________________________520-80100k1M10M100MPOWER-SUPPLY REJECTIONvs. FREQUENCY-60M A X 4014-10FREQUENCY (Hz)P O W E R -S U P P L Y R E J E C T I O N (d B )-40-20010-70-50-30-1076453M A X 4014-16TEMPERATURE (°C)-25-500755025100POWER-SUPPLY CURRENT (PER AMPLIFIER)vs. TEMPERATUREP O W E R -S U P P L Y C U R R E N T (m A)1011101k10M1MCURRENT NOISE DENSITYvs. FREQUENCYM A X 4014-11FREQUENCY (Hz)N O I S E (p A / H z )10010k 100k1001011101k10M1MVOLTAGE NOISE DENSITYvs. FREQUENCYM A X 4014-12FREQUENCY (Hz)N O I S E (n V /H z )10010k 100k52101001k10k100k1MOUTPUT SWING vs. LOAD RESISTANCEM A X 4014-13LOAD RESISTANCE (Ω)O U T P U T S W I N G (V p -p )344.54.03.52.52.01.53.01.0M A X 4014-14LOAD RESISTANCE (Ω)255075100125150OUTPUT SWINGvs. LOAD RESISTANCE (R L )O U T P U T S W I N G (V p -p )400350300250150501002000M A X 4014-15LOAD RESISTANCE (Ω)1000200500400300600BANDWIDTH vs. LOAD RESISTANCEB A N D W I D T H (M H z )6.05.54.55.04.0M A X 4014-17TEMPERATURE (°C)-25-500755025100INPUT BIAS CURRENT vs. TEMPERATUREI N P U T B I A S C U R R E N T (µA )0.200.160.120.040.080M A X 4014-18TEMPERATURE (°C)-25-500755025100INPUT OFFSET CURRENT vs. TEMPERATUREI N P U T O F F S E T C U R R E N T (µA )__________________________________________Typical Operating Characteristics(V CC = +5V, V EE = 0V, A VCL = +2, R L = 150Ωto V CC / 2, T A = +25°C, unless otherwise noted.)M A X 4014/M A X 4017/M A X 4019/M A X 4022Low-Cost, High-Speed, Single-Supply, Gain of +2 Buffers with Rail-to-Rail Outputs in SOT236_______________________________________________________________________________________1086420M A X 4014-19POWER-SUPPLY VOLTAGE (V)43567891011POWER-SUPPLY CURRENT (PER AMPLIFIER)vs. POWER-SUPPLY VOLTAGEP O W E R -S U P P L Y C U R R E N T (m A )5.04.84.64.24.44.0TEMPERATURE (°C)-25-500755025100VOLTAGE SWING vs. TEMPERATUREV O L T A G E S W I N G (V p -p )543120M A X 4014-20TEMPERATURE (°C)-25-500755025100INPUT OFFSET VOLTAGE vs. TEMPERATUREI N P U T O F F S E T V O L T A G E (m V )-0.025-0.020-0.015-0.010-0.0050.0000.0050.01001000100DIFFERENTIAL GAIN AND PHASE-0.05-0.04-0.02-0.03-0.010.000.01IRE IRED I F F . P H A SE (de g )D I F F . G A I N (%)M A X 4014-22IN OUTV O L T A G E(500m V /d i v )LARGE-SIGNAL PULSE RESPONSEMAX4014-25TIME (20ns/div)V CM = 0.9V, R L = 100Ω to GROUNDIN OUT V O L T A G E (25m V /d i v )SMALL-SIGNAL PULSE RESPONSEM A X 4014-23TIME (20ns/div)V CM = 1.25V, R L = 100Ω to GROUNDINOUTV O L T A G E (25m V /d i v )SMALL-SIGNAL PULSE RESPONSE(C L = 5pF)MAX4014-24TIME (20ns/div)INOUTV O L T A G E (500m V /d i v )LARGE-SIGNAL PULSE RESPONSE(C L = 5pF)MAX4014-26TIME (20ns/div)V CM = 1.75V, R L = 100Ω to GROUNDEN_5.0V (ENABLE)0V(DISABLE)1V0VOUTENABLE RESPONSE TIMEMAX4014-27TIME (1µs/div)V IN = 0.5V__________________________________________Typical Operating Characteristics(V CC = +5V, V EE = 0V, A VCL = +2, R L = 150Ωto V CC / 2, T A = +25°C, unless otherwise noted.)MAX4014/MAX4017/MAX4019/MAX4022Low-Cost, High-Speed, Single-Supply, Gain of +2Buffers with Rail-to-Rail Outputs in SOT23_______________________________________________________________________________________7______________________________________________________________Pin DescriptionM A X 4014/M A X 4017/M A X 4019/M A X 4022Low-Cost, High-Speed, Single-Supply, Gain of +2 Buffers with Rail-to-Rail Outputs in SOT238______________________________________________________________________________________________________Detailed DescriptionThe MAX4014/MAX4017/MAX4019/MAX4022 are sin-gle-supply, rail-to-rail output, voltage-feedback, closed-loop buffers that employ current-feedback techniques to achieve 600V/µs slew rates and 200MHz band-widths. These buffers use internal 500Ωresistors to provide a preset closed-loop gain of +2V/V in the non-inverting configuration or -1V/V in the inverting configu-ration. Excellent harmonic distortion and differential gain/phase performance make these buffers an ideal choice for a wide variety of video and RF signal-pro-cessing applications.Local feedback around the buffer’s output stage ensures low output impedance, which reduces gain sensitivity to load variations. This feedback also pro-duces demand-driven current bias to the output tran-sistors for ±120mA drive capability, while constraining total supply current to less than 7mA.__________Applications InformationPower SuppliesThese devices operate from a single +3.15V to +11V power supply or from dual supplies of ±1.575V to ±5.5V. For single-supply operation, bypass the V CC pin to ground with a 0.1µF capacitor as close to the pin as possible. If operating with dual supplies, bypass each supply with a 0.1µF capacitor.Selecting Gain ConfigurationEach buffer in the MAX4014 family can be configured for a voltage gain of +2V/V or -1V/V. For a gain of+2V/V, ground the inverting terminal. Use the noninvert-ing terminal as the signal input of the buffer (Figure 1a).Grounding the noninverting terminal and using the inverting terminal as the signal input configures the buffer for a gain of -1V/V (Figure 1b).Since the inverting input exhibits a 500Ωinput imped-ance, terminate the input with a 56Ωresistor when the device is configured for an inverting gain in 50Ωappli-cations (terminate with 88Ωin 75Ωapplications).Terminate the input with a 49.9Ωresistor in the nonin-verting case. Output terminating resistors should direct-ly match cable impedances in either configuration.Layout TechniquesMaxim recommends using microstrip and stripline tech-niques to obtain full bandwidth. To ensure that the PC board does not degrade the buffer’s performance, design it for a frequency greater than 1GHz. Pay careful attention to inputs and outputs to avoid large parasitic capaci-tance. Whether or not you use a constant-impedance board, observe the following guidelines when designing the board:•Don’t use wire-wrapped boards. They are too inductive.•Don’t use IC sockets. They increase parasitic capac-itance and inductance.•Use surface-mount instead of through-hole compon-ents for better high-frequency performance.•Use a PC board with at least two layers; it should be as free from voids as possible.•Keep signal lines as short and as straight as possi-ble. Do not make 90°turns; round all corners.Figure 1a. Noninverting Gain Configuration (A V = +2V/V)Figure 1b. Inverting Gain Configuration (A V = -1V/V)MAX4014/MAX4017/MAX4019/MAX4022Low-Cost, High-Speed, Single-Supply, Gain of +2Buffers with Rail-to-Rail Outputs in SOT23_______________________________________________________________________________________9Input Voltage Range and Output SwingThe input range for the MAX4014 family extends from (V EE - 100mV) to (V CC - 2.25V). I nput ground sensing increases the dynamic range for single-supply applica-tions. The outputs drive a 2k Ωload to within 60mV of the power-suply rails. With heavier loads, the output swing is reduced as shown in the Electrical Character-istics and the Typical Operating Characteristics . As the load increases, the input range is effectively limited bythe output-drive capability, since the buffers have a fixed voltage gain of +2 or -1.For example, a 50Ωload can typically be driven from 40mV above V EE to 1.6V below V CC , or 40mV to 3.4V when operating from a single +5V supply. If the buffer is operated in the noninverting, gain of +2 configuration with the inverting input grounded, the effective input voltage range becomes 20mV to 1.7V, instead of the -100mV to 2.75V indicated by the Electrical Character-istics . Beyond the effective input range, the buffer out-put is a nonlinear function of the input, but it will not undergo phase reversal or latchup.EnableThe MAX4019 has an enable feature (EN_) that allows the buffer to be placed in a low-power state. When the buffers are disabled, the supply current will not exceed 550µA per buffer.As the voltage at the EN_ pin approaches the negativesupply rail, the EN_ input current rises. Figure 2 shows a graph of EN_ input current versus EN_ pin voltage.Figure 3 shows the addition of an optional resistor in series with the EN pin, to limit the magnitude of the cur-rent increase. Figure 4 displays the resulting EN pin input current to voltage relationship.Figure 3. Circuit to Reduce Enable Logic-Low Input CurrentFigure 4. Enable Logic-Low Input Current vs. Enable Logic-Low Threshold with 10k ΩSeries ResistorM A X 4014/M A X 4017/M A X 4019/M A X 4022Low-Cost, High-Speed, Single-Supply, Gain of +2 Buffers with Rail-to-Rail Outputs in SOT2310______________________________________________________________________________________Disabled Output ResistanceThe MAX4014/MAX4017/MAX4019/MAX4022 include internal protection circuitry that prevents damage to the precision input stage from large differential input volt-ages, as shown in Figure 5. This protection circuitry con-sists of five back-to-back Schottky diodes between IN_+and IN_-. These diodes lower the disabled output resis-tance from 1k Ωto 500Ωwhen the output voltage is 3V greater or less than the voltage at I N_+. Under theseconditions, the input protection diodes will be forward biased, lowering the disabled output resistance to 500Ω.Output Capacitive Loading and StabilityThe MAX4014/MAX4017/MAX4019/MAX4022 provide maximum AC performance with no load capacitance.This is the case when the load is a properly terminated transmission line. However, they are designed to drive up 25pF of load capacitance without oscillating, but with reduced AC performance.Driving large capacitive loads increases the chance of oscillations occurring in most amplifier circuits. This is especially true for circuits with high loop gains, such as voltage followers. The buffer’s output resistance and the load capacitor combine to add a pole and excess phase to the loop response. I f the frequency of this pole is low enough to interfere with the loop response and degrade phase margin sufficiently, oscillations can occur.A second problem when driving capacitive loads results from the amplifier’s output impedance, which looks inductive at high frequencies. This inductance forms an L-C resonant circuit with the capacitive load,which causes peaking in the frequency response and degrades the amplifier’s gain margin.Figure 6 shows the frequency response of the MAX4014/MAX4017/MAX4019/MAX4022 under different capacitive loads. To drive loads with greater than 25pF of capaci-tance or to settle out some of the peaking, the output requires an isolation resistor like the one shown inFigure 5. Input Protection CircuitFigure 7. Driving a Capacitive Load through an Isolation ResistorMAX4014/MAX4017/MAX4019/MAX4022Low-Cost, High-Speed, Single-Supply, Gain of +2Buffers with Rail-to-Rail Outputs in SOT23______________________________________________________________________________________11Figure 8. Capacitive Load vs. Isolation ResistanceFigure 9. Small-Signal Gain vs. Frequency with Load Capacitance and 27ΩIsolation ResistorFigure 7. Figure 8 is a graph of the optimal isolation resis-tor versus load capacitance. Figure 9 shows the frequen-cy response of the MAX4014/MAX4017/MAX4019/MAX4022 when driving capacitive loads with a 27Ωisola-tion resistor.Coaxial cables and other transmission lines are easily dri-ven when properly terminated at both ends with their characteristic impedance. Driving back-terminated trans-mission lines essentially eliminates the lines’ capacitance.M A X 4014/M A X 4017/M A X 4019/M A X 4022Low-Cost, High-Speed, Single-Supply, Gain of +2 Buffers with Rail-to-Rail Outputs in SOT23Maxim 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©2001 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.__________________________________________________________Pin Configurations___________________Chip InformationSUBSTRATE CONNECTED TO V EE。