19-1089; Rev 2; 8/97 Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps ____________________Selection Table PART AMPS PER PACKAGE SHUTDOWN MODE PINPACKAGE MAX4130 1 — 5 SOT23-5 MAX4131 1 Yes 8 SO/µMAX MAX4132 2 — 8 SO/µMAX MAX4133 2 Yes 14 SO MAX4134 4 — 14 SO ____________________________Features ♦ 5-Pin SOT23-5 Package (MAX4130) ♦ +2.7V to +6.5V Single-Supply Operation ♦ Rail-to-Rail Input Common-Mode Voltage Range ♦ Rail-to-Rail Output Voltage Swing ♦ 10MHz Gain-Bandwidth Product ♦ 900µA Quiescent Current per Amplifier ♦ 25µA Shutdown Function (MAX4131/MAX4133) ♦ 200µV Offset Voltage ♦ No Phase Reversal for Overdriven Inputs ♦ Drive 250Ω Loads ♦ Stable with 160pF Capacitive Loads ♦ Unity-Gain Stable ______________Ordering Information PART TEMP. RANGE PINPACKAGE SOT TOP MARK MAX4130EUK -40°C to +85°C 5 SOT23-5 AABB MAX4131C/D MAX4131ESA MAX4131EUA 0°C to +70°C -40°C to +85°C -40°C to +85°C Dice* 8 SO 8 µMAX Ordering Information continued at end of data sheet. *Dice are specified at TA = +25°C, DC parameters only. __________Typical Operating Circuit ________________________Applications +3V Battery-Powered Instruments MAX147 3 Portable Equipment Data-Acquisition Systems Signal Conditioning Low-Power, Low-Voltage Applications — — — 6 SERIAL INTERFACE 8 7 SHDN VDD DOUT AIN SCLK VREF CS GND 1 2 MAX4131 4 5 Pin Configurations appear at end of data sheet. ________________________________________________________________ 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. MAX4130–MAX4134 _______________General Description The MAX4130–MAX4134 family of operational amplifiers combines 10MHz gain-bandwidth product and excellent DC accuracy with rail-to-rail operation at the inputs and outputs. These devices require only 900µA per amplifier, and operate from either a single supply (+2.7V to +6.5V) or dual supplies (±1.35V to ±3.25V) with a commonmode voltage range that extends 250mV beyond VEE and VCC. They are capable of driving 250Ω loads and are unity-gain stable. In addition, the MAX4131/ MAX4133 feature a shutdown mode in which the outputs are placed in a high-impedance state and the supply current is reduced to only 25µA per amplifier. With their rail-to-rail input common-mode range and output swing, the MAX4130–MAX4134 are ideal for lowvoltage, 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 signalconditioning stages for precision, low-voltage dataacquisition systems. The MAX4130 comes in the space-saving SOT23-5 package. MAX4130–MAX4134 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 = +70°C) 5-pin SOT23-5 (derate 7.1mW/°C above +70°C) .........571mW 8-pin SO (derate 5.88mW/°C above +70°C).................471mW 8-pin µMAX (derate 4.10mW/°C above +70°C) ............330mW 14-pin SO (derate 8.00mW/°C above +70°C)...............640mW Operating Temperature Range MAX413_E__ ....................................................-40°C to +85°C Maximum Junction Temperature .....................................+150°C Storage Temperature Range .............................-65°C to +160°C Lead Temperature (soldering, 10sec) .............................+300°C 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, VEE = 0V, VCM = 0V, VOUT = VCC / 2, RL tied to VCC / 2, SHDN ≥ 2V (or open), TA = +25°C, unless otherwise noted.) PARAMETER Input Offset Voltage CONDITIONS VCM = VEE to VCC MIN TYP MAX MAX4130EUK ±0.35 ±1.50 MAX4131ESA ±0.20 ±0.60 MAX4131EUA ±0.35 ±1.20 MAX4132ESA/MAX4133ESD ±0.25 ±0.75 MAX4132EUA ±0.40 ±1.50 MAX4134ESD ±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 - 0.25V) < VCM < (VCC + 0.25V) VCC + 0.25 V 90 78 98 MAX4131EUA 68 88 MAX4132ESA/MAX4133ESD 74 94 MAX4132EUA 66 86 MAX4134ESD 64 84 78 100 dB 0.1 Ω AV = 1 Off-Leakage Current SHDN < 0.8V, VOUT = 0V to VCC 2 nA kΩ 67 Output Resistance VCC = 5V nA MAX4131ESA VCC = 2.7V to 6.5V VCC = 2.7V mV MAX4130EUK Power-Supply Rejection Ratio Large-Signal Voltage Gain UNITS ±0.1 VOUT = 0.25V to 2.45V, RL = 100kΩ 92 108 VOUT = 0.4V to 2.3V, RL = 250Ω 72 82 VOUT = 0.25V to 4.75V, RL = 100kΩ 94 108 VOUT = 0.4V to 4.6V, RL = 250Ω 75 86 _______________________________________________________________________________________ dB ±1 µA dB Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps (VCC = +2.7V to +6.5V, VEE = 0V, VCM = 0V, VOUT = VCC / 2, RL tied to VCC / 2, SHDN ≥ 2V (or open), TA = +25°C, unless otherwise noted.) PARAMETER CONDITIONS MAX4130/ MAX4131 RL = 100kΩ RL = 250Ω Output Voltage Swing MAX4132/ MAX4133/ MAX4134 RL = 100kΩ RL = 250Ω 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 MAX4131–MAX4134 SHDN Input Current MAX4131–MAX4134 Low High 2.0 2.7 Supply Current per Amplifier VCM = VOUT = VCC / 2 Shutdown Supply Current per Amplifier SHDN > 0.8V, MAX4131–MAX4134 mV mA 0.8 ±1 Operating Supply-Voltage Range UNITS V ±3 µA 6.5 V VCC = 2.7V 900 1050 VCC = 5V 1000 1150 VCC = 2.7V 25 40 VCC = 5V 40 60 µA µA 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 = -40°C to +85°C, unless otherwise noted.) PARAMETER Input Offset Voltage CONDITIONS VCM = VEE to VCC MIN TYP MAX MAX4130EUK ±3.50 MAX4131ESA ±0.75 MAX4131EUA ±4.40 MAX4132ESA/MAX4133ESD ±0.95 MAX4132EUA ±4.70 MAX4134ESD ±4.00 Input Offset Voltage Tempco ±2 UNITS mV µV/°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) MAX4130EUK 62 MAX4131ESA 76 MAX4131EUA 60 MAX4132ESA/MAX4133ESD 74 MAX4132EUA 58 MAX4134ESD 60 dB _______________________________________________________________________________________ 3 MAX4130–MAX4134 DC ELECTRICAL CHARACTERISTICS (continued) MAX4130–MAX4134 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 = -40°C to +85°C, 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 MAX4130/ MAX4131 MIN MAX 74 VOUT = 0.25V to 2.45V, RL = 100kΩ 84 VOUT = 0.4V to 2.3V, RL = 250Ω 66 VOUT = 0.25V to 4.75V, RL = 100kΩ 86 VOUT = 0.4V to 4.6V, RL = 250Ω 68 RL = 100kΩ Output Voltage Swing RL = 100kΩ RL = 250Ω SHDN Logic Threshold MAX4131–MAX4134 MAX4131—MAX4134 SHDN Input Current MAX4131–MAX4134 VCC - VOH 25 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, MAX4131–MAX4134 µA dB VOL - VEE High UNITS dB ±12 RL = 250Ω MAX4132/ MAX4133/ MAX4134 TYP mV V ±3 µA 6.5 V VCC = 2.7V 1100 VCC = 5V 1200 VCC = 2.7V 50 VCC = 5V 70 µA µA AC ELECTRICAL CHARACTERISTICS (VCC = +2.7V to +6.5V, VEE = 0V, SHDN ≥ 2V (or open), TA = +25°C, unless otherwise noted.) PARAMETER CONDITIONS MIN TYP MAX UNITS Gain-Bandwidth Product 10 MHz Phase Margin 62 degrees 12 dB Gain Margin Total Harmonic Distortion f = 10kHz, VOUT = 2Vp-p (AV = 1) Slew Rate Settling Time to 0.01% AV = 1, VOUT = 2V step Turn-On Time VCC = 0V to 3V step, VOUT = VCC / 2 SHDN Delay MAX4131–MAX4134, VCC = 3V, VOUT = VCC / 2 Input Capacitance 0.003 % 4 V/µs 2.0 µs 1 µs Enable 1 Disable 0.2 µs 3 pF Input Noise Voltage Density f = 1kHz 22 nV/√Hz Input Noise Current Density f = 1kHz 0.4 pA/√Hz Capacitive Load Stability AV = 1 160 pF 4 _______________________________________________________________________________________ Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps MAX4130/34-02 60 144 20 36 0 -36 PHASE -72 -108 -20 108 72 20 36 0 0 -36 PHASE -72 -20 10k 100k 1M 10M -144 -40 100 1k 10k FREQUENCY (Hz) 1M 10M 10 1150 MAX4130/34-05 10 1 0.10 VCC = +6.5V 1100 SUPPLY CURRENT (µA) AV = +1 1050 1000 VCC = +2.7V 950 900 10M 100M 50 VCC = +6.5V 40 35 30 25 VCC = +2.7V 20 15 5 1M 10M 0 -40 -25 -10 100M AV = +1 SHDN = 0V VOUT SHORT TO VEE VCC = +6.5V VCC = +2.7V 5 0 VOUT SHORT TO VCC VCC = +6.5V VCC = +2.7V 20 35 50 65 INPUT BIAS CURRENT vs. COMMON-MODE VOLTAGE INPUT BIAS CURRENT vs. TEMPERATURE VCC = +6.5V 20 10 0 -10 -20 -30 -40 5 20 35 50 65 TEMPERATURE (°C) 80 95 80 95 60 40 20 VCC = +6.5V, VCM = VCC VCC = +2.7V, VCM = VCC 0 -20 VCC = +2.7V, VCM = VEE -40 VCC = +6.5V, VCM = VEE -60 -40 -25 -10 20 35 50 65 TEMPERATURE (°C) -50 -10 5 TEMPERATURE (°C) VCC = +2.7V 30 -40 -25 -10 80 95 40 INPUT BIAS CURRENT (nA) MAX4130/34-08 OUTPUT LEAKAGE CURRENT vs. TEMPERATURE 5 MAX4130/34-11 100k INPUT BIAS CURRENT (nA) 10k MAX4130/34-10 1k FREQUENCY (Hz) LEAKAGE CURRENT (µA) 1M 45 800 100 -5 10k 100k 10 0.01 10 1k SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE 850 15 100 FREQUENCY (Hz) SUPPLY CURRENT PER AMPLIFIER vs. TEMPERATURE 100 OUTPUT IMPEDANCE (Ω) 100k -100 -180 100M FREQUENCY (Hz) OUTPUT IMPEDANCE vs. FREQUENCY 20 -60 -80 SUPPLY CURRENT (µA) 1k -180 100M -40 -108 -144 -40 100 -20 MAX4130/34-06 0 GAIN (dB) GAIN (dB) 72 AV = +1 0 144 GAIN AV = +1000 RL = ∞ CL = 160pF 40 108 MAX4130/34-07 GAIN PHASE (DEGREES) AV = +1000 NO LOAD 180 PSR (dB) 180 PHASE (DEGREES) MAX4130/34-01 60 40 POWER-SUPPLY REJECTION vs. FREQUENCY GAIN AND PHASE vs. FREQUENCY (WITH CLOAD) MAX4130/34-03 GAIN AND PHASE vs. FREQUENCY -60 0 1 2 3 4 5 COMMON-MODE VOLTAGE (V) 6 -40 -25 -10 5 20 35 50 65 80 95 TEMPERATURE (°C) _______________________________________________________________________________________ 5 MAX4130–MAX4134 __________________________________________Typical Operating Characteristics (VCC = +5V, VEE = 0V, VCM = VCC / 2, TA = +25°C, unless otherwise noted.) ____________________________ Typical Operating Characteristics (continued) (VCC = +5V, VEE = 0V, VCM = VCC / 2, TA = +25°C, unless otherwise noted.) -1.50 SO PACKAGE -2.25 1.4 1.3 1.2 -3.00 -40 -25 -10 5 20 35 50 65 5 20 35 50 65 MAX4130/34-12 20 35 50 65 LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE VCC = +6.5V RL TO VEE 120 120 MAX4130/34-16 130 MAX4130/34-19 RL = 100kΩ 90 105 RL = 100kΩ 100 RL = 10kΩ RL = 2kΩ 90 80 80 300 400 500 600 RL = 2kΩ 95 90 RL = 500Ω 80 75 70 70 200 100 85 RL = 500Ω 75 70 RL = 10kΩ 110 GAIN (dB) RL = 500Ω GAIN (dB) RL = 2kΩ 95 80 95 RL = 100kΩ VCC = +2.7V RL TO VCC 115 110 0 100 200 300 400 500 0 600 100 200 300 400 500 600 OUTPUT VOLTAGE: EITHER SUPPLY (mV) OUTPUT VOLTAGE: EITHER SUPPLY (mV) OUTPUT VOLTAGE: EITHER SUPPLY (mV) LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE LARGE-SIGNAL GAIN vs. TEMPERATURE LARGE-SIGNAL GAIN vs. TEMPERATURE 120 VCC = +2.7V RL TO VEE 115 110 RL = 100kΩ GAIN (dB) RL = 500Ω RL = 2kΩ 90 RL = 10kΩ VOUT(p-p) = VCC -1V RL = 500Ω VCC = +6.5V, RL TO VEE 100 85 VCC = +2.7V, RL TO VEE 100 200 300 400 500 600 OUTPUT VOLTAGE: EITHER SUPPLY (mV) 110 105 VCC = +6.5V, RL TO VCC 95 90 VCC = +2.7V, RL TO VCC -40 -25 -10 5 20 35 50 65 TEMPERATURE (°C) VCC = +2.7V, RL TO VCC OR VEE 100 RL = 100kΩ VOUT(p-p) = VCC - 0.6V 80 80 60 VCC = +6.5V, RL TO VCC OR VEE 115 105 90 70 125 120 95 80 130 GAIN (dB) MAX4130/34-15 120 0 5 LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE 85 6 -40 -25 -10 LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE 100 100 VCM = 0.3V TO 5.3V 85 TEMPERATURE (°C) 105 110 VCM = 0.2V TO 5.2V 90 80 95 RL = 10kΩ 100 95 TEMPERATURE (°C) 110 0 100 TEMPERATURE (°C) VCC = +6.5V RL TO VCC 115 105 80 -40 -25 -10 80 95 120 GAIN (dB) 1.5 VCM = 0V TO 5.0V 110 MAX4130/34-18 -0.75 1.6 115 MAX4130/34-20 0 1.7 COMMON-MODE REJECTION (dB) 0.75 1.8 120 MAX4130/34-17 VOLTAGE (mV) 1.50 1.9 MAX4130/34-21 SOT23-5 PACKAGE MINIMUM OPERATING VOLTAGE (V) MAX4130/34-09 3.00 2.25 COMMON-MODE REJECTION vs. TEMPERATURE MINIMUM OPERATING VOLTAGE vs. TEMPERATURE INPUT OFFSET VOLTAGE vs. TEMPERATURE GAIN (dB) MAX4130–MAX4134 Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps 80 95 -40 -25 -10 5 20 35 50 65 TEMPERATURE (°C) _______________________________________________________________________________________ 80 95 Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps 250 VCC - VOUT (mV) VCC = +6.5V, RL = 500Ω 100 80 VCC = +2.7V, RL = 500Ω 60 VCC = +6.5V, RL = 500Ω 200 VCC = +2.7V, RL = 500Ω 150 0.030 MAX4130/34-14 140 RL TO VEE 100 2Vp-p SIGNAL 500kHz LOWPASS FILTER RL = 10kΩ TO VCC / 2 0.025 THD AND NOISE (%) RL TO VCC VOUT - VEE (mV) 300 MAX4130/34-13 160 120 TOTAL HARMONIC DISTORTION AND NOISE vs. FREQUENCY MAXIMUM OUTPUT VOLTAGE vs. TEMPERATURE MAX4130/34-22A MINIMUM OUTPUT VOLTAGE vs. TEMPERATURE 0.020 0.015 0.010 40 VCC = +2.7V, RL = 100kΩ -40 -25 -10 20 35 50 65 -40 -25 -10 5 20 35 50 65 TOTAL HARMONIC DISTORTION AND NOISE vs. PEAK-TO-PEAK SIGNAL AMPLITUDE CHANNEL SEPARATION vs. FREQUENCY 0.01 RL = 2kΩ RL = 10kΩ RL = 100kΩ 10 80 95 140 VS = +5V 130 100 1k 10k FREQUENCY (Hz) 100k MAX4131 SMALL-SIGNAL TRANSIENT RESPONSE (NONINVERTING) AV = +1 VOLTAGE (50mV/div) AV = +1 10kHz SINE WAVE RL TO VCC / 2 500kHz LOWPASS FILTER CHANNEL SEPARATION (dB) MAX4130/34-23 TEMPERATURE (°C) RL = 250Ω 120 110 100 IN OUT 90 0.001 80 4.4 4.6 4.8 5.0 1k 10k 100k 1M FREQUENCY (Hz) MAX4131 SMALL-SIGNAL TRANSIENT RESPONSE (INVERTING) MAX4131 LARGE-SIGNAL TRANSIENT RESPONSE (NONINVERTING) AV = +1 VOLTAGE (2V/div) IN OUT MAX4131 LARGE-SIGNAL TRANSIENT RESPONSE (INVERTING) AV = -1 IN OUT TIME (200ns/div) TIME (200ns/div) VOLTAGE (2V/div) AV = -1 10M MAX4130/34-26 PEAK-TO-PEAK SIGNAL AMPLITUDE (V) MAX4130/34-27 4.2 MAX4130/34-25 4.0 VOLTAGE (50mV/div) 0 0 80 95 TEMPERATURE (°C) 0.1 THD + NOISE (%) 5 0.005 MAX4130/34-25a 0 VCC = +6.5V, RL = 100kΩ (TOP) VCC = +2.7V, RL = 100kΩ (BOTTOM) 50 MAX4130/34-24 VCC = +6.5V, RL = 100kΩ 20 IN OUT TIME (2µs/div) TIME (2µs/div) _______________________________________________________________________________________ 7 MAX4130–MAX4134 ____________________________Typical Operating Characteristics (continued) (VCC = +5V, VEE = 0V, VCM = VCC / 2, TA = +25°C, unless otherwise noted.) MAX4130–MAX4134 Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps ______________________________________________________________Pin Description MAX4130 MAX4131 MAX4132 MAX4133 MAX4134 NAME FUNCTION 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. Not internally connected. — 8 — — — SHDN Shutdown Control. Tie high or leave floating to enable amplifier. — — 1, 7 1, 13 1, 7 OUT1, OUT2 Outputs for amps 1 and 2 — — 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+ Inverting Inputs for amps 1 and 2 Noninverting Inputs for amps 1 and 2 Shutdown Control, independent 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 MAX4130 MAX4131 MAX4132 MAX4133 MAX4134 MAX4130 MAX4131 MAX4132 MAX4133 MAX4134 R3 R3 R3 = R1 R3 = R1 R2 R1 R2 Figure 1a. Reducing Offset Error Due to Bias Current (Noninverting) 8 R2 R1 R2 Figure 1b. Reducing Offset Error Due to Bias Current (Inverting) _______________________________________________________________________________________ Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps Rail-to-Rail Input Stage Devices in the MAX4130–MAX4134 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 that combine to provide an input common-mode range that extends 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 200µV. The switchover transition region, which occurs near VCC / 2, has been extended to minimize the slight degradation in common-mode rejection ratio caused by the mismatch of the input pairs. Their low offset voltage, high bandwidth, and rail-to-rail common-mode 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. Reduce the offset error caused by input bias currents flowing through external source impedances by matching the effective impedance seen by each input (Figures 1a, 1b). High source impedances, together with 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 response. The MAX4130–MAX4134’s inputs are protected from large differential input voltages by 1kΩ series resistors and back-to-back triple diodes across the inputs (Figure 2). For differential input voltages less than 1.8V, input resistance is typically 500kΩ. For differential input voltages greater than 1.8V, input resistance is approximately 2kΩ. The input bias current is given by the following equation: IBIAS = VDIFF - 1.8V 2kΩ 1k 1k Figure 2. Input Protection Circuit _______________________________________________________________________________________ 9 MAX4130–MAX4134 __________Applications Information Rail-to-Rail Output Stage The minimum output voltage is 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 MAX4131 connected as a voltage follower. With a +3V supply and the load tied to ground, the output swings from 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 (500Ω to ground). Driving a capacitive load can cause instability in most high-speed op amps, especially those with low quiescent current. The MAX4130–MAX4134 have a high tolerance for capacitive loads. They are stable with capacitive loads up to 160pF. Figure 4 gives the stable operating region for capacitive loads. Figures 5 and 6 show the response with capacitive loads and the results of adding an isolation resistor in series with the output (Figure 7). The resistor improves the circuit’s phase margin by isolating the load capacitor from the op amp’s output. 500 450 LOAD CAPACITANCE (pF) VOLTAGE (1V/div) VCC = 3V, RL = 10kΩ to VEE IN 400 UNSTABLE OPERATING REGION 350 300 250 200 150 STABLE OPERATING REGION 100 OUT RL to VEE VOUT = VCC/2 50 0 TIME (1µs/div) 0.1 1 10 100 LOAD RESISTANCE (kΩ) Figure 3. Rail-to-Rail Input/Output Voltage Range VCC = 5V CL = 1000pF RS = 39Ω VCC = 5V RL = 10kΩ CL = 130pF IN OUT IN OUT TIME (200ns/div) Figure 5. MAX4131 Small-Signal Transient Response with Capacitive Load 10 Figure 4. Capacitive-Load Stability VOLTAGE (50mV/div) VOLTAGE (50mV/div) MAX4130–MAX4134 Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps TIME (500ns/div) Figure 6. MAX4131 Transient Response to Capacitive Load with Isolation Resistor ______________________________________________________________________________________ Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps amplifiers are disabled with the outputs in a highimpedance state. Pulling SHDN high or leaving it floating enables the amplifier. In the dual-amplifier MAX4133, the shutdown functions operate independently. Figures 11 and 12 show the output voltage and supply current responses of the MAX4131 to a shutdown pulse, using the test circuit of Figure 8. VCC 0V TO 2.7V STEP FOR POWER-UP TEST; 2.7V FOR SHUTDOWN ENABLE TEST. *0.1µF 2k OUT RS SHDN 0V TO 2.7V STEP FOR SHUTDOWN TEST CL 2k 10k 10Ω SUPPLY-CURRENT MONITORING POINT *FOR SHUTDOWN TEST ONLY. Figure 7. Capacitive-Load Driving Circuit Figure 8. Power-Up/Shutdown Test Circuit VCC (1V/div) OUT IEE (500µA/div) VOLTAGE (1V/div) VCC TIME (5µs/div) Figure 9. Power-Up Output Voltage TIME (5µs/div) Figure 10. Power-Up Supply Current ______________________________________________________________________________________ 11 MAX4130–MAX4134 Power-Up and Shutdown Mode The MAX4130–MAX4134 amplifiers typically settle within 1µs after power-up. Figures 9 and 10 show the output voltage and supply current on power-up, using the test circuit of Figure 8. The MAX4131 and MAX4133 have a shutdown option. When the shutdown pin (SHDN) is pulled low, the supply current drops below 25µA per amplifier and the SHDN 1V/div SHDN VOLTAGE (1V/div) MAX4130–MAX4134 Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps SUPPLY CURRENT 500µA/div OUT TIME (1µs/div) Figure 11. Shutdown Output Voltage Power Supplies and Layout The MAX4130–MAX4134 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 0.1µF ceramic capacitor in parallel with at least 1µF. For dual supplies, bypass each supply to ground. 12 TIME (1µs/div) Figure 12. Shutdown Enable/Disable Supply Current Good layout improves performance by decreasing the amount of stray capacitance at the op amp’s inputs and outputs. Decrease stray capacitance by placing external components close to the op amp’s pins, minimizing trace lengths and resistor leads. ______________________________________________________________________________________ Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps TOP VIEW OUT 1 VEE 2 5 VCC 4 IN- MAX4130 IN+ 3 SOT23-5 N.C. 1 OUT1 1 8 VCC 7 OUT2 IN1+ 3 6 IN2- VEE 4 5 IN2+ 8 SHDN 7 VCC IN1- 2 IN1+ 3 6 OUT VEE 4 5 N.C. IN1- 2 MAX4131 MAX4132 SO/µMAX SO/µMAX OUT1 1 14 VCC OUT1 1 14 OUT4 IN1- 2 13 OUT2 IN1- 2 13 IN4- IN1+ 3 12 IN2- IN1+ 3 12 IN4+ VEE 4 MAX4133 N.C. 5 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 MAX4134 11 IN2+ 11 VEE SO ______________________________________________________________________________________ 13 MAX4130–MAX4134 __________________________________________________________Pin Configurations MAX4130–MAX4134 Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps _Ordering Information (continued) PART TEMP. RANGE PINPACKAGE SOT TOP MARK MAX4132ESA -40°C to +85°C 8 SO — MAX4132EUA MAX4133C/D MAX4133ESD MAX4134ESD -40°C to +85°C 0°C to +70°C -40°C to +85°C -40°C to +85°C 8 µMAX Dice* 14 SO 14 SO — — — — ___________________Chip Information MAX4130 TRANSISTOR COUNT: 170 MAX4132 TRANSISTOR COUNT: 340 MAX4134 TRANSISTOR COUNT: 680 *Dice are specified at TA = +25°C, DC parameters only. __________________________________________________________Chip Topographies MAX4131 MAX4133 V CC OUT1 V EE IN- IN1- OUT2 SHDN iN+ 0.055" (1.397mm) 0.066" (1.676mm) IN2- IN1+ V EE IN2+ V CC V EE 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 14 ______________________________________________________________________________________ Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps b DIM e A A1 A2 b C D E E1 L e e1 α E e1 D α MILLIMETERS MIN MAX 0.90 1.45 0.00 0.15 0.90 1.30 0.35 0.50 0.08 0.20 2.80 3.00 2.60 3.00 1.50 1.75 0.35 0.55 0.95ref 1.90ref 0° 10° 21-0057B E1 A A2 C 5-PIN SOT23-5 SMALL-OUTLINE TRANSISTOR PACKAGE L A1 DIM C α A 0.101mm 0.004 in e B A1 L A A1 B C D E e H L α INCHES MAX MIN 0.044 0.036 0.008 0.004 0.014 0.010 0.007 0.005 0.120 0.116 0.120 0.116 0.0256 0.198 0.188 0.026 0.016 6° 0° MILLIMETERS MIN MAX 0.91 1.11 0.10 0.20 0.25 0.36 0.13 0.18 2.95 3.05 2.95 3.05 0.65 4.78 5.03 0.41 0.66 0° 6° 21-0036D E H 8-PIN µMAX MICROMAX SMALL-OUTLINE PACKAGE D ______________________________________________________________________________________ 15 MAX4130–MAX4134 ________________________________________________________Package Information MAX4130–MAX4134 Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps ___________________________________________Package Information (continued) DIM D 0°-8° A 0.101mm 0.004in. e B A1 E C L Narrow SO SMALL-OUTLINE PACKAGE (0.150 in.) H A A1 B C E e H L INCHES MAX MIN 0.069 0.053 0.010 0.004 0.019 0.014 0.010 0.007 0.157 0.150 0.050 0.244 0.228 0.050 0.016 DIM PINS D D D 8 14 16 MILLIMETERS MIN MAX 1.35 1.75 0.10 0.25 0.35 0.49 0.19 0.25 3.80 4.00 1.27 5.80 6.20 0.40 1.27 INCHES MILLIMETERS MIN MAX MIN MAX 0.189 0.197 4.80 5.00 0.337 0.344 8.55 8.75 0.386 0.394 9.80 10.00 21-0041A 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 © 1997 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.