19-1087; Rev 1; 8/97 Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps ________________________Applications Features 5-Pin SOT23 Package (MAX4122/4) +2.7V to +6.5V Single-Supply Operation Rail-to-Rail Input Common-Mode Voltage Range Rail-to-Rail Output Voltage Swing 5MHz Gain-Bandwidth Product (MAX4122/3/6/7/9) 25MHz Gain-Bandwidth Product (MAX4124/5/8) 650A Quiescent Current per Amplifier 25A Shutdown Function (MAX4123/5/7) 200V Offset Voltage No Phase Reversal for Overdriven Inputs Drive 250 Loads Stable with 500pF Capacitive Loads Unity-Gain Stable (MAX4122/3/6/7/9) Stable at Gains 10V/V (MAX4124/5/8) Ordering Information PART TEMP. RANGE MAX4122EUK -40C to +85C PINPACKAGE 5 SOT23-5 MARKING INFO. AAAZ Data-Acquisition Systems Signal Conditioning MAX4123C/D -- 0C to +70C Dice* -- MAX4123ESA -40C to +85C 8 SO MAX4123EUA -40C to +85C 8 MAX -- Ordering Information continued at end of data sheet. *Dice are specified at TA = +25C, DC parameters only. Low-Power, Low-Voltage Applications Pin Configurations appear at end of data sheet. Battery-Powered Instruments Portable Equipment Selection Table PART BW (MHz) AMPS PER PKG. SHUTDOWN MODE PINPACKAGE MAX4122 5 1 -- 5 SOT23-5 MAX4123 5 1 Yes 8 SO/MAX MAX4124 25 MAX4125 25 1 -- 5 SOT23-5 1 Yes 8 SO/MAX MAX4126 5 2 -- 8 SO/MAX MAX4127 5 2 Yes MAX4128 25 2 -- 8 SO/MAX MAX4129 5 4 -- 14 SO 14 SO __________Typical Operating Circuit +5V MAX187 3 6 SERIAL INTERFACE 8 7 SHDN VDD DOUT AIN SCLK VREF CS GND 1 2 MAX4123 4 5 Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd. ________________________________________________________________ Maxim Integrated Products 1 For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 408-737-7600 ext. 3468. MAX4122-MAX4129 General Description The MAX4122-MAX4129 family of operational amplifiers combines wide bandwidth and excellent DC accuracy with Rail-to-Rail(R) operation at the inputs and outputs. These devices require only 650A per amplifier, and operate from either a single supply (+2.7V to +6.5V) or dual supplies (1.35V to 3.25V) with a common-mode voltage range that extends 250mV beyond VEE and VCC. They are capable of driving 250 loads. The MAX4122/MAX4123/ MAX4126/MAX4127/MAX4129 have a 5MHz gain bandwidth product, while the decompensated MAX4124/ MAX4125/MAX4128 (stable at closed-looped gains of 10 or greater) have a 25MHz gain bandwidth product. In addition, the MAX4123/MAX4125/MAX4127 feature a shutdown mode in which the outputs are placed in a high-impedance state and the supply current is reduced to only 25A per amplifier. With their rail-to-rail input common-mode range and output swing, these amplifiers are ideal for low-voltage single-supply operation. Although the minimum operating voltage is specified at 2.7V, the devices typically operate down to 1.8V. In addition, low offset voltage and high speed make them the ideal signal-conditioning stages for precision, low-voltage, data-acquisition systems. The MAX4122 and MAX4124 come in the space-saving 5-pin SOT23-5 package. MAX4122-MAX4129 Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps ABSOLUTE MAXIMUM RATINGS Supply Voltage (VCC-VEE).....................................................7.5V IN+, IN-, SHDN Voltage ...................(VCC + 0.3V) to (VEE - 0.3V) Output Short-Circuit Duration (Note 1).......................Continuous (short to either supply) Continuous Power Dissipation (TA = +70C) 5-pin SOT23-5 (derate 7.1mW/C above +70C) .........571mW 8-pin SO (derate 5.88mW/C above +70C).................471mW 8-pin MAX (derate 4.10mW/C above +70C) ............330mW 14-pin SO (derate 8.00mW/C above +70C)...............640mW Operating Temperature Range MAX412_E__ ....................................................-40C to +85C Maximum Junction Temperature .....................................+150C Storage Temperature Range .............................-65C to +160C Lead Temperature (soldering, 10sec) .............................+300C Note 1: Provided that the maximum package power-dissipation rating is met. 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. DC ELECTRICAL CHARACTERISTICS (VCC = +2.7V to +6.5V, V EE = 0V, V CM = 0V, V OUT = V CC/2, R L tied to V CC/2, SHDN 2V (or open), T A = +25C, unless otherwise noted.) PARAMETER Input Offset Voltage CONDITIONS VCM = VEE to VCC MIN TYP MAX MAX4123ESA/MAX4125ESA 0.20 0.60 MAX4122EUK/MAX4124EUK 0.35 1.50 MAX4123EUA/MAX4125EUA 0.35 1.20 MAX4126ESA/MAX4127ESD/MAX4128ESA 0.25 0.75 MAX4126EUA/MAX4128EUA 0.40 1.50 MAX4129ESD 0.35 1.50 50 150 12 Input Bias Current VCM = VEE to VCC Input Offset Current VCM = VEE to VCC 1 Differential Input Resistance -1.5V < VDIFF < 1.5V 500 Common-Mode Input Voltage Range Common-Mode Rejection Ratio VEE 0.25 (VEE 0.25) < VCM < (VCC + 0.25V) VCC + 0.25 V 98 67 90 MAX4123EUA/MAX4125EUA 68 88 MAX4126ESA/MAX4127ESD/MAX4128ESA 74 94 MAX4126EUA/MAX4128EUA 66 86 MAX4129ESD 64 84 78 100 dB 0.1 AV = 1 Off-Leakage Current SHDN < 0.8V, VOUT = 0V to VCC 2 nA k 78 Output Resistance VCC = 5V nA MAX4122EUK/MAX4124EUK VCC = 2.7V to 6.5V VCC = 2.7V mV MAX4123ESA/MAX4125ESA Power-Supply Rejection Ratio Large-Signal Voltage Gain UNITS 0.1 VOUT = 0.25V to 2.45V, RL = 100k 92 104 VOUT = 0.4V to 2.3V, RL = 250 72 80 VOUT = 0.25V to 4.75V, RL = 100k 94 106 VOUT = 0.4V to 4.6V, RL = 250 75 84 _______________________________________________________________________________________ dB 1 A dB Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps (VCC = +2.7V to +6.5V, V EE = 0V, V CM = 0V, V OUT = V CC/2, R L tied to V CC/2, SHDN 2V (or open), T A = +25C, unless otherwise noted.) PARAMETER CONDITIONS MAX4122/ MAX4123/ MAX4124/ MAX4125 RL = 100k MAX4126/ MAX4127/ MAX4128/ MAX4129 RL = 100k RL = 250 Output Voltage Swing RL = 250 MIN VCC - VOH TYP MAX 12 20 VOL - VEE 20 35 VCC - VOH 240 290 VOL - VEE 125 170 VCC - VOH 15 30 VOL - VEE 25 40 VCC - VOH 280 330 VOL - VEE 180 230 Output Short-Circuit Current 50 SHDN Logic Threshold MAX4123/MAX4125/MAX4127 SHDN Input Current MAX4123/MAX4125/MAX4127 Low High 2.0 2.7 Supply Current per Amplifier VCM = VOUT = VCC/2 Shutdown Supply Current per Amplifier SHDN > 0.8V, MAX4123/MAX4125/MAX4127 mV mA 0.8 1 Operating Supply-Voltage Range UNITS V 3 A 6.5 V VCC = 2.7V 650 750 VCC = 5V 725 825 VCC = 2.7V 25 40 VCC = 5V 40 60 A A DC ELECTRICAL CHARACTERISTICS (VCC = +2.7V to +6.5V, VEE = 0V, VCM = 0V, VOUT = VCC/2, RL tied to VCC/2, SHDN 2V (or open), TA = -40C to +85C, unless otherwise noted.) PARAMETER Input Offset Voltage CONDITIONS VCM = VEE to VCC MIN TYP MAX MAX4123ESA/MAX4125ESA 0.75 MAX4122EUK/MAX4124EUK 3.50 MAX4123EUA/MAX4125EUA 4.40 MAX4126ESA/MAX4127ESD/MAX4128ESA 0.95 MAX4126EUA/MAX4128EUA 4.70 MAX4129ESD 4.00 Input Offset Voltage Tempco 2 UNITS mV V/C Input Bias Current VCM = VEE to VCC 160 nA Input Offset Current VCM = VEE to VCC 18 nA VCC + 0.20 V Common-Mode Input Voltage Range Common-Mode Rejection Ratio VEE 0.20 (VEE 0.2V) < VCM < (VCC + 0.2V) MAX4123ESA/MAX4125ESA 76 MAX4122EUK/MAX4124EUK 62 MAX4123EUA/MAX4125EUA 60 MAX4126ESA/MAX4127ESD/MAX4128ESA 74 MAX4126EUA/MAX4128EUA 58 MAX4129ESD 60 dB _______________________________________________________________________________________ 3 MAX4122-MAX4129 DC ELECTRICAL CHARACTERISTICS (continued) MAX4122-MAX4129 Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps DC ELECTRICAL CHARACTERISTICS (continued) (VCC = +2.7V to +6.5V, VEE = 0V, VCM = 0V, VOUT = VCC/2, RL tied to VCC/2, SHDN 2V (or open), TA = -40C to +85C, unless otherwise noted.) PARAMETER CONDITIONS Power-Supply Rejection Ratio VCC = 2.7V to 6.5V Off-Leakage Current SHDN < 0.8V, VOUT = 0V to VCC VCC = 2.7V Large-Signal Voltage Gain VCC = 5V MAX4122/ MAX4123/ MAX4124/ MAX4125 TYP MAX 74 84 VOUT = 0.4V to 2.3V, RL = 250 66 VOUT = 0.25V to 4.75V, RL = 100k 86 VOUT = 0.4V to 4.6V, RL = 250 68 RL = 100k RL = 250 RL = 100k RL = 250 SHDN Logic Threshold MAX4123/MAX4125/MAX4127 SHDN Input Current MAX4123/MAX4125/MAX4127 25 VCC - VOH 40 VCC - VOH 300 VOL - VEE 190 VCC - VOH 35 VOL - VEE 50 VCC - VOH 350 VOL - VEE 250 Low 0.8 Operating Supply-Voltage Range 2.0 2.7 Supply Current per Amplifier VCM = VOUT = VCC/2 Shutdown Supply Current per Amplifier SHDN < 0.8V, MAX4123/MAX4125/MAX4127 A dB VOL - VEE High UNITS dB 12 VOUT = 0.25V to 2.45V, RL = 100k Output Voltage Swing MAX4126/ MAX4127/ MAX4128/ MAX4129 MIN mV V 3 A 6.5 V VCC = 2.7V 775 VCC = 5V 850 VCC = 2.7V 50 VCC = 5V 70 A A AC ELECTRICAL CHARACTERISTICS (VCC = +2.7V to +6.5V, VEE = 0V, SHDN 2V (or open), TA = +25C, unless otherwise noted.) PARAMETER Gain-Bandwidth Product Phase Margin Gain Margin Total Harmonic Distortion Slew Rate Settling Time to 0.01% Turn-On Time 4 CONDITIONS MIN TYP MAX4122/23/26/27/29 5 MAX4124/25/28 (AV 10) 25 MAX4122/23/26/27/29 64 MAX4124/25/28 (AV 10) 60 MAX4122/23/26/27/29 12 MAX4124/25/28 (AV 10) 10 f = 10kHz, VOUT = 2Vp-p, MAX4122/23/26/27/29 (AV = 1) 0.003 MAX4122/23/26/27/29 2 MAX4124/25/28 (AV 10) 10 MAX4122/23/26/27/29 (AV = 1), VOUT = 2V step 2.0 MAX4124/25/28 (AV 10), VOUT = 2V step 1.3 VCC = 0V to 3V step, VOUT = VCC/2 1 _______________________________________________________________________________________ MAX UNITS MHz degrees dB % V/s s s Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps (VCC = +2.7V to +6.5V, VEE = 0V, SHDN 2V (or open), TA = +25C, unless otherwise noted.) PARAMETER CONDITIONS VCC = 3V, VOUT = VCC/2, MAX4123/25/27 SHDN Delay MIN TYP Enable 1 Disable 0.2 Input Capacitance MAX UNITS s 3 pF Input Noise Voltage Density f = 1kHz 22 nV/Hz Input Noise Current Density f = 1kHz 0.4 pA/Hz Amp-Amp Isolation MAX4126/27/28/29 135 dB MAX4122/23/26/27/29 (AV = 1) 500 MAX4124/25/28 (AV 10) 500 Capacitive Load Stability pF __________________________________________Typical Operating Characteristics (VCC = +5V, VEE = 0V, VCM = VCC/2, TA = +25C, unless otherwise noted.) MAX4122/23/26/27/29 GAIN AND PHASE vs. FREQUENCY (WITH CLOAD) 180 MAX4122/29-02 60 144 20 36 0 -36 PHASE 20 36 0 0 -108 -36 PHASE -72 -20 72 -20 1k 10k 100k 1M 10M 1k 10k 1M 10M MAX4124/25/28 GAIN AND PHASE vs. FREQUENCY MAX14122/29-04 GAIN 180 60 MAX4124/25/28 GAIN AND PHASE vs. FREQUENCY (WITH CLOAD) MAX4122/29-05 20 36 0 PHASE -36 40 GAIN (dB) GAIN (dB) 72 0 AV = +1000 RL = CL = 500 pF GAIN 20 -108 -20 -40 1k 10k 100k FREQUENCY (Hz) 1M 10M 72 -36 -72 -20 1M 10M 100M -20 -40 -60 -80 -108 -144 -144 -180 -180 100M -40 100 100k AV = +10 0 108 0 PHASE 0 10k 180 36 -72 100 1k MAX4124/25/28 POWER-SUPPLY REJECTION vs. FREQUENCY 144 108 PHASE (DEGREES) AV = +1000 NO LOAD 100 FREQUENCY (Hz) 144 40 10 FREQUENCY (Hz) FREQUENCY (Hz) 60 100k -100 -180 100M MAX4122/29-06 100 -40 100 -60 -80 -108 -144 -180 100M -40 -72 -144 -40 -20 PSR (dB) 0 108 GAIN PSR (dB) 72 GAIN (dB) 108 GAIN PHASE (DEGREES) GAIN (dB) 40 AV = +1000 RL = CL = 500pF AV = +1 0 144 40 PHASE (DEGREES) AV = +1000 NO LOAD 180 PHASE (DEGREES) MAX4322/26/29-01 60 MAX4122/23/26/27/29 POWER-SUPPLY REJECTION vs. FREQUENCY MAX4122/29-03 MAX4322/26/29 GAIN AND PHASE vs. FREQUENCY 1k 10k 100k 1M FREQUENCY (Hz) 10M -100 10 100 1k 10k 100k 1M 10M 100M FREQUENCY (Hz) _______________________________________________________________________________________ 5 MAX4122-MAX4129 AC ELECTRICAL CHARACTERISTICS (continued) Typical Operating Characteristics (continued) (VCC = +5V, VEE = 0V, VCM = VCC/2, TA = +25C, unless otherwise noted.) 100 90 80 70 10 1 MAX4122/29-09 AV = +10 OUTPUT IMPEDANCE () 110 100 MAX4122/29-08 AV = +1 OUTPUT IMPEDANCE () 120 CHANNEL SEPARATION (dB) 100 MAX4122/29-07 130 MAX4124/25/28 OUTPUT IMPEDANCE vs. FREQUENCY MAX4122/23/26/27/29 OUTPUT IMPEDANCE vs. FREQUENCY MAX4126/27/28/29 CHANNEL SEPARATION vs. FREQUENCY 10 1 0.1 60 1M 10M SUPPLY CURRENT PER AMPLIFIER vs. TEMPERATURE 800 VCC = 6.5V 750 700 VCC = 2.7V 650 600 550 1M 10M 100 100M 5 20 35 50 65 80 100k 1M 10M MAX4323/MAX4327 SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE OUTPUT LEAKAGE CURRENT vs. TEMPERATURE 50 VCC = 6.5V 40 30 VCC = 2.7V 20 20 15 10 10 AV = +1 SHDN = 0V VCC = 6.5V VOUT SHORT TO VEE VCC = 2.7V 0 VCC = 6.5V VOUT SHORT TO VCC VCC = 2.7V -10 5 20 35 50 65 80 95 -40 -25 -10 5 20 35 50 65 TEMPERATURE (C) TEMPERATURE (C) TEMPERATURE (C) INPUT OFFSET VOLTAGE vs. TEMPERATURE INPUT BIAS CURRENT vs. COMMON-MODE VOLTAGE INPUT BIAS CURRENT vs. TEMPERATURE INPUT BIAS CURRENT (nA) 40 1.50 0.75 0 -0.75 -1.50 VCC = 2.7V 30 VCC = 6.5V 20 10 0 -10 -20 40 20 0 -20 -50 -3.00 -50 -60 20 35 50 65 80 95 0 1 2 3 4 5 COMMON-MODE VOLTAGE (V) 6 VCC = 2.7V, VCM = VEE -30 -40 5 VCC = 2.7V, VCM = VCC -10 -40 TEMPERATURE (C) 95 10 -30 -40 -25 -10 VCC = 6.5V, VCM = VCC 30 -2.25 SO PACKAGE 80 50 INPUT BIAS CURRENT (nA) SOT23-5 PACKAGE 2.25 50 MAX4122/29-13 3.00 100M 5 -5 -40 -25 -10 95 10k FREQUENCY (Hz) SHDN = 0V -40 -25 -10 1k FREQUENCY (Hz) 0 500 6 100k MAX4122/29-14 SUPPLY CURRENT (A) 850 10k 60 SHUTDOWN SUPPLY CURRENT (mA) MAX4122/29-10 900 0.1 1k MAX4122/29-15 10k 100k FREQUENCY (Hz) LEAKAGE CURRENT (A) 1k MAX4322-11 100 MAX4122/29-12 0.01 100 50 VOLTAGE (mV) MAX4122-MAX4129 Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps VCC = 6.5V, VCM = VEE -40 -25 -10 5 20 35 50 TEMPERATURE (C) _______________________________________________________________________________________ 65 80 95 Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps MINIMUM OUTPUT VOLTAGE vs. TEMPERATURE 105 100 VCC = 6.5V, RL = 500 150 VCC = 2.7V, RL = 500 100 VCM = 0.2V TO 5.2V VCC = 6.5V, RL = 100k 50 35 50 80 -40 -25 -10 95 5 20 35 50 65 0 80 95 -40 -25 -10 65 LARGE-SIGNAL GAIN vs. TEMPERATURE 120 VCC = 6.5V RL TO VEE 110 125 MAX4122/29-20 RL = 100k 100 120 RL = 500 RL = 2k 80 70 60 60 100 95 VCC = 6.5V, RL TO VCC 85 80 100 200 300 400 500 VCC = 2.7V, RL TO VCC 75 0 600 100 200 300 400 500 600 -40 -25 -10 5 20 35 50 65 OUTPUT VOLTAGE: EITHER SUPPLY (mV) OUTPUT VOLTAGE: EITHER SUPPLY (mV) TEMPERATURE (C) LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE LARGE-SIGNAL GAIN vs. TEMPERATURE VCC = 6.5V RL TO VCC 110 RL = 100k RL = 10k RL = 10k 100 RL = 2k 90 RL = 500 80 90 RL = 500 105 100 300 400 500 OUTPUT VOLTAGE: EITHER SUPPLY (mV) 600 VCC = 2.7V, RL TO VCC 90 85 60 200 VCC = 2.7V, RL TO VEE 95 80 100 VCC = 6.5V, RL TO VCC 95 110 70 60 VCC = 6.5V, RL TO VEE 115 RL = 2k 80 70 80 120 GAIN (dB) GAIN (dB) 100 125 MAX4122/29-23 RL = 100k VCC = 2.7V RL TO VCC 120 MAX4122/29-22 120 95 VCC = 2.7V, RL TO VEE 105 90 RL = 500 70 VCC = 6.5V, RL TO VEE 110 RL = 10k 90 RL = 500 VOUT(p-p) = VCC - 1V 80 115 GAIN (dB) GAIN (dB) RL = 2k 80 GAIN (dB) 50 LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE 90 0 35 LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE RL = 10k 110 20 TEMPERATURE (C) 100 0 5 TEMPERATURE (C) RL = 100k GAIN (dB) VCC = 6.5V, RL = 100k (TOP) TEMPERATURE (C) VCC = 2.7V RL TO VEE 110 65 MAX4122/29-19 120 20 VCC = 2.7V, RL = 500 VCC = 2.7V, RL = 100k (BOTTOM) VCC = 2.7V, RL = 100k 0 80 5 150 50 VCM = 0.3V TO 5.3V -40 -25 -10 200 100 90 85 VCC = 6.5V, RL = 500 MAX4122/29-21 95 200 VOUT - VEE (mV) VCM = 0V TO 5.0V RL TO VEE 250 MAX4122/29-24 110 RL TO VCC VCC - VOUT (mV) 115 300 MAX4122/29-17 250 MAX4122/29-16 COMMON-MODE REJECTION (dB) 120 MAXIMUM OUTPUT VOLTAGE vs. TEMPERATURE MAX4122/29-18 COMMON-MODE REJECTION vs. TEMPERATURE VOUT(p-p) = VCC - 600mV RL = 100k 75 0 100 200 300 400 500 OUTPUT VOLTAGE: EITHER SUPPLY (mV) 600 -40 -25 -10 5 20 35 50 65 80 95 TEMPERATURE (C) _______________________________________________________________________________________ 7 MAX4122-MAX4129 Typical Operating Characteristics (continued) (VCC = +5V, VEE = 0V, VCM = VCC/2, TA = +25C, unless otherwise noted.) Typical Operating Characteristics (continued) (VCC = +5V, VEE = 0V, VCM = VCC/2, TA = +25C, unless otherwise noted.) 1.8 AV = +1 2Vp-p SIGNAL 500kHz LOWPASS FILTER RL = 10k TO VCC/2 0.035 0.030 1.6 1.5 1.4 0.025 THD + N (%) THD & NOISE (%) 1.7 0.020 0.015 AV = +1 10kHz SINEWAVE RL TO VCC/2 500kHz LOWPASS FILTER 0.01 RL = 2k RL = 250 0.010 RL = 10k 0.005 0.001 0 5 20 35 50 65 80 10 95 100 TEMPERATURE (C) MAX4122/23/26/27/29 SMALL-SIGNAL TRANSIENT RESPONSE (NONINVERTING) 4.0 100k OUT 4.4 4.6 4.8 MAX4122/23/26/27/29 LARGE-SIGNAL TRANSIENT RESPONSE (NONINVERTING) AV = +1 IN IN OUT OUT MAX4122/23/26/27/29 LARGE-SIGNAL TRANSIENT RESPONSE (INVERTING) MAX4124/25/28 SMALL-SIGNAL TRANSIENT RESPONSE (NONINVERTING) MAX4124/25/28 SMALL-SIGNAL TRANSIENT RESPONSE (INVERTING) AV = +10 AV = -10 IN (2V/div) IN (5mV/div) IN (5mV/div) OUT (2V/div) OUT (50mV/div) OUT (50mV/div) TIME (2s/div) TIME (200ns/div) MAX4122/29-32 TIME (2s/div) MAX4122/29-31 TIME (200ns/div) MAX4122/29-34 TIME (200ns/div) AV = -1 5.0 VOLTAGE (2V/div) VOLTAGE (50mV/div) IN AV = -1 4.2 PEAK-TO-PEAK SIGNAL AMPLITUDE (V) MAX4122/23/26/27/29 SMALL-SIGNAL TRANSIENT RESPONSE (INVERTING) MAX4122/29-28 AV = +1 1k 10k FREQUENCY (Hz) MAX4122/29-29 -40 -25 -10 RL = 100k MAX4122/29-30 1.3 1.2 8 0.1 MAX4122/29-26 0.040 MAX4122/29-25 MINIMUM OPERATING VOLTAGE (V) 1.9 MAX4123 TOTAL HARMONIC DISTORTION AND NOISE vs. PEAK-TO-PEAK SIGNAL AMPLITUDE MAX4122/23/26/27/29 TOTAL HARMONIC DISTORTION AND NOISE vs. FREQUENCY MAX4122/29-27 MAX4123 MINIMUM OPERATING VOLTAGE vs. TEMPERATURE VOLTAGE (50mV/div) MAX4122-MAX4129 Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps TIME (200ns/div) _______________________________________________________________________________________ Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps MAX4122/29-33 AV = +10 MAX4122/29-35 MAX4124/25/28 LARGE-SIGNAL TRANSIENT RESPONSE (INVERTING) MAX4124/25/28 LARGE-SIGNAL TRANSIENT RESPONSE (NONINVERTING) AV = -10 IN (200mV/div) IN (200mV/div) OUT (2V/div) OUT (2V/div) TIME (2s/div) TIME (2s/div) Pin Description PIN NAME FUNCTION MAX4122 MAX4124 MAX4123 MAX4125 MAX4126 MAX4128 MAX4127 MAX4129 1 6 -- -- -- OUT Output 2 4 4 4 11 VEE Negative Supply. Ground for single-supply operation. 3 3 -- -- -- IN+ Noninverting Input 4 2 -- -- -- IN- Inverting Input 5 7 8 14 4 VCC Positive Supply -- 1, 5 -- 5, 7, 8, 10 -- N.C. No Connect -- 8 -- -- -- SHDN -- -- 1, 7 1, 13 1, 7 OUT1, OUT2 -- -- 2, 6 2, 12 2, 6 IN1-, IN2- -- -- 3, 5 3, 11 3, 5 IN1+, IN2+ -- -- -- 6, 9 -- SHDN1, SHDN2 -- -- -- -- 8, 14 OUT3, OUT4 -- -- -- -- 9, 13 IN3-, IN4- -- -- -- -- 10, 12 IN3+, IN4+ Shutdown Control. Tie high or leave floating to enable amplifier. Outputs for Amps 1 and 2 Inverting Inputs for Amps 1 and 2 Noninverting Inputs for Amps 1 and 2 Shutdown Control for Amps 1 and 2. Tie high or leave floating to enable amplifier. Outputs for Amps 3 and 4 Inverting Inputs for Amps 3 and 4 Noninverting Inputs for Amps 3 and 4 _______________________________________________________________________________________ 9 MAX4122-MAX4129 Typical Operating Characteristics (continued) (VCC = +5V, VEE = 0V, VCM = VCC/2, TA = +25C, unless otherwise noted.) MAX4122-MAX4129 Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps MAX4122- MAX4129 R3 R3 = R1 R2 R3 R3 = R1 R1 R2 Figure 1a. Reducing Offset Error Due to Bias Current (Noninverting) R2 R1 R2 Figure 1b. Reducing Offset Error Due to Bias Current (Inverting) 1k 1k Figure 2. Input Protection Circuit 10 MAX4122- MAX4129 ______________________________________________________________________________________ Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps Rail-to-Rail Input Stage IBIAS = VDIFF - 1.8V 2k Rail-to-Rail Output Stage The minimum output voltage will be within millivolts of ground for single-supply operation where the load is referenced to ground (VEE). Figure 3 shows the input voltage range and output voltage swing of a MAX4123 connected as a voltage follower. With a +3V supply and the load tied to ground, the output swings from VOLTAGE (1V/div) VCC = 3V AV = +1 OUT TIME (2s/div) Figure 3. Rail-to-Rail Input /Output Voltage Range 10,000 CAPACITIVE LOAD (pF) Devices in the MAX4122-MAX4129 family of highspeed amplifiers have rail-to-rail input and output stages designed for low-voltage single-supply operation. The input stage consists of separate NPN and PNP differential stages, which combine to provide an input common-mode range extending 0.2V beyond the supply rails. The PNP stage is active for input voltages close to the negative rail, and the NPN stage is active for input voltages near the positive rail. The input offset voltage is typically below 200V. The switchover transition region, which occurs near V CC / 2, has been extended to minimize the slight degradation in CMRR caused by the mismatch of the input pairs. Their low offset voltage, high bandwidth, and rail-to-rail commonmode range make these op amps excellent choices for precision low-voltage data-acquisition systems. Since the input stage switches between the NPN and PNP pairs, the input bias current changes polarity as the input voltage passes through the transition region. To reduce the offset error caused by input bias currents flowing through external source impedances, match the effective impedance seen by each input (Figures 1a, 1b). High source impedances, together with the input capacitance, can create a parasitic pole that produces an underdamped signal response. Reducing the input impedance or placing a small (2pF to 10pF) capacitor across the feedback resistor improves the response. The MAX4122-MAX4129's inputs are protected from large differential input voltages by 1k series resistors and back-to-back triple diodes across the inputs (Figure 2). For differential input voltages less than 1.8V the input resistance is typically 500k. For differential input voltages greater than 1.8V the input resistance is approximately 2k, and the input bias current is determined by the following equation: IN MAX4122-MAX4129 Applications Information UNSTABLE REGION 1000 RL TO VEE VOUT = VCC/2 100 100 1k 10k 100k RESISTIVE LOAD () Figure 4. Capacitive-Load Stability 0.00V to 2.90V. The maximum output voltage swing depends on the load, but will be within 150mV of a +3V supply, even with the maximum load (500 to ground). Driving a capacitive load can cause instability in most high-speed op amps, especially those with low quiescent current. The MAX4122-MAX4129 have a high tolerance for capacitive loads. They are stable with capacitive loads up to 500pF. Figure 4 gives the stable operating region for capacitive loads. Figures 5-8 show the response with capacitive loads, and the results of adding an isolation resistor in series with the output (Figure 9). The resistor improves the circuit's phase margin by isolating the load capacitor from the op amp's output. ______________________________________________________________________________________ 11 AV = +10 CL = 500pF IN (5mV/div) IN VOLTAGE VOLTAGE (50mV/div) AV = +1 CL = 500pF OUT (50mV/div) OUT TIME (1s/div) TIME (400ns/div) Figure 5. MAX4122/23/26/27/29 Small-Signal Transient Response with Capacitive Load IN Figure 6. MAX4124/25/28 Small-Signal Transient Response with Capacitive Load AV = +1 CL = 1000pF RS = 39 AV = +10 CL = 1000pF RS = 56 IN (5mV/div) VOLTAGE VOLTAGE (50mV/div) MAX4122-MAX4129 Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps OUT OUT (50mV/div) TIME (400ns/div) TIME (1s/div) Figure 7. MAX4122/23/26/27/29 Transient Response to Capacitive Load with Isolation Resistor Figure 8. MAX4124/25/28 Transient Response to Capacitive Load with Isolation Resistor VCC 0V TO 2.7V STEP FOR POWER-UP TEST. 2.7V 2k FOR SHUTDOWN ENABLE TEST. RS VOUT SHDN CL 2k 0V TO 2.7V STEP FOR SHUTDOWN TEST 10k 10 SUPPLY-CURRENT MONITORING POINT Figure 9. Capacitive-Load-Driving Circuit 12 Figure 10. Power-Up/Shutdown Test Circuit ______________________________________________________________________________________ Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps OUT ICC (500A/div) VOLTAGE (1V/div) VCC (1V/div) TIME (5s/div) Figure 11. Power-Up Output Voltage MAX4122-MAX4129 VCC TIME (5s/div) Figure 12. Power-Up Supply Current VCC = 2.7V RL = 10k VCC = 2.7V SHDN (1V/div) SHDN (1V/div) OUT (0.5V/div) ICC (500A/div) TIME (2s/div) Figure 13. Shutdown Output Voltage TIME (2s/div) Figure 14. Shutdown Enable/Disable Supply Current Power-Up and Shutdown Mode Power Supplies and Layout The MAX4122-MAX4129 amplifiers typically settle within 1s after power-up. Using the test circuit of Figure 10, Figures 11 and 12 show the output voltage and supply current on power-up. The MAX4122-MAX4129 operate from a single +2.7V to +6.5V power supply, or from dual supplies of 1.35V to 3.25V. For single-supply operation, bypass the power supply with a 0.1F ceramic capacitor in parallel with at least 1F. For dual supplies, bypass each supply to ground. Good layout improves performance by decreasing the amount of stray capacitance at the op amp's inputs and outputs. To decrease stray capacitance, minimize trace lengths and resistor leads by placing external components close to the op amp's pins. The MAX4123, MAX4125, and MAX4127 have a shutdown option. When the shutdown pin (SHDN) is pulled low, the supply current drops below 25A per amplifier and the amplifiers are disabled with the outputs in a high-impedance state. Pulling SHDN high or leaving it floating enables the amplifier. In the dual-amplifier MAX4129, the shutdown functions operate independently. Figures 13 and 14 show the output voltage and supply current responses of the MAX4123 to a shutdown pulse. ______________________________________________________________________________________ 13 Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps MAX4122-MAX4129 Pin Configurations TOP VIEW OUT 1 VEE 2 5 VCC 4 IN- MAX4122 MAX4124 IN+ 3 SOT23-5 N.C. 1 IN1- 2 IN1+ 3 MAX4123 MAX4125 VEE 4 OUT1 1 8 SHDN 7 VCC IN1- 2 6 OUT IN1+ 3 5 N.C. VEE 4 OUT1 1 14 VCC IN1- 2 IN1+ 3 VEE 4 MAX4127 14 7 OUT2 6 IN2- 5 IN2+ OUT1 1 14 OUT4 13 OUT2 IN1- 2 13 IN4- 12 IN2- IN1+ 3 12 IN4+ 11 IN2+ VCC 4 10 N.C. IN2+ 5 10 IN3+ IN2- 6 9 IN3- OUT2 7 8 OUT3 SHDN1 6 9 SHDN2 N.C. 7 8 N.C. SO VCC SO/MAX SO/MAX N.C. 5 MAX4126 MAX4128 8 MAX4129 11 VEE SO ______________________________________________________________________________________ Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps PART TEMP. RANGE PINPACKAGE MARKING INFO. MAX4124EUK -40C to +85C MAX4125ESA -40C to +85C MAX4125EUA -40C to +85C 5 SOT23-5 8 SO 8 MAX AABA -- -- MAX4126ESA -40C to +85C MAX4126EUA -40C to +85C MAX4127C/D 0C to +70C 8 SO 8 MAX Dice* -- -- -- MAX4127ESD -40C to +85C MAX4128ESA -40C to +85C MAX4128EUA -40C to +85C 14 SO 8 SO 8 MAX -- -- -- MAX4129ESD -40C to +85C 14 SO -- *Dice are specified at TA = +25C, DC parameters only. __________________________________________________________Chip Topographies MAX4123/ MAX4125 V EE MAX4127/ MAX4128 OUT1 IN- V CC IN1- OUT2 SHDN iN+ 0.055" (1.397mm) 0.066" (1.676mm) IN2- IN1+ V CC V EE V EE IN2+ OUT 0.036" (0.914mm) V CC SHDN1 V EE V CC SHDN2 0.053" (1.346mm) TRANSISTOR COUNT: 170 TRANSISTOR COUNT: 340 SUBSTRATE CONNECTED TO VEE SUBSTRATE CONNECTED TO VEE ______________________________________________________________________________________ 15 MAX4122-MAX4129 Ordering Information (continued) ________________________________________________________Package Information SOT5L.EPS MAX4122-MAX4129 Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps 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. 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 1997 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.