19-0127; Rev. 1; 11/98 17µA Max, Dual/Quad, Single-Supply, Precision Op Amps ___________________________Features The MAX478 and MAX479 are dual and quad micropower, precision op amps available in 8-pin and 14-pin DIP and small-outline packages, respectively. Both devices feature an extremely low, 17µA max supply current per op amp, 70µV max offset voltage, 2.2µV/°C max offset voltage drift (0.5µV/°C typ), and 250pA max input offset current. ♦ 17µA Max Supply Current (MAX478A/MAX479A) ♦ 70µV Max Offset Voltage (MAX478A) ♦ Single-Supply Operation: Input Voltage Range Includes Ground Output Swings to Ground While Sinking Current No Pull-Down Resistors Required ♦ Dual Op Amp in 8-Pin DIP/SO Package (MAX478) Quad Op Amp in 14-Pin DIP/SO Package (MAX479) ♦ 250pA Max Input Offset Current (MAX478A/MAX479A) ♦ 0.5µV/°C Offset-Voltage Drift ♦ Output Sources and Sinks 5mA Load Current The MAX478 and MAX479 operate from a single supply. The input voltage range includes ground, and the output swings to within a few millivolts of ground, which eliminates pull-down resistors and saves power. Both devices are optimized for single 3V and 5V supply operation, with guaranteed specifications at each supply voltage. Specifications for ±15V operation are also provided. ______________Ordering Information Thermocouple Amplifier PART MAX478ACPA MAX478CPA MAX478CSA MAX478C/D MAX478EPA MAX478ESA MAX479ACPD MAX479CPD MAX479CSD MAX479EPD MAX479ESD Micropower Filters * Dice are specified at TA = +25°C, DC parameters only. Single Lithium Cell Powered Systems _________________Pin Configurations _______________________Applications Battery- or Solar-Powered Systems: Portable Instrumentation Remote Sensor Amplifier Satellite Circuitry Micropower Sample-and-Hold __________Typical Operating Circuit R3 R1 R2 TEMP. RANGE 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C TOP VIEW OUTA 1 INA- 2 INA+ 3 R2 R1 PIN-PACKAGE 8 Plastic DIP 8 Plastic DIP 8 SO Dice* 8 Plastic DIP 8 SO 14 Plastic DIP 14 Plastic DIP 14 SO 14 Plastic DIP 14 SO V- 4 A B MAX478 8 V+ 7 OUTB 6 INB- 5 INB+ DIP/SO +5V 1/2MAX478 VOUT OUTA 1 INA- 2 14 OUTD A V1 1/2MAX478 VOUT = (V1-V2) (1 + R1 R1 +2 ) R2 R3 MICROPOWER, HIGH INPUT IMPEDANCE DIFFERENTIAL AMPLIFIER WITH VARIABLE GAIN IN 8-PIN DIP/SO INB+ 5 INB- 6 13 IND12 IND+ V+ 4 V2 D INA+ 3 11 V- MAX479 B OUTB 7 C 10 INC+ 9 INC- 8 OUTC DIP/SO ________________________________________________________________ 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 1-800-835-8769. MAX478/MAX479 _______________General Description MAX478/MAX479 17µA Max, Dual/Quad, Single-Supply, Precision Op Amps ABSOLUTE MAXIMUM RATINGS Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±22V Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±30V Input Voltage . . . . . . . . . . . . . . . . . . . Equal to Positive Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V Below Negative Supply Voltage Output Short-Circuit Duration. . . . . . . . . . . . . . . . . . . . . . . . . Continuous Continuous Power Dissipation (TA = +70°C): 8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) . . . . . 727mW 14-Pin Plastic DIP (derate 10.00mW/°C above +70°C) . . 800mW 14-Pin Wide SO (derate 9.52mW/°C above +70°C) . . . 762mW Operating Temperature Ranges: MAX47_ACP_/C_ _ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C MAX47_E_ _ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C Storage Temperature Range . . . . . . . . . . . . . . . . . . . -65°C to +150°C Lead Temperature (soldering, 10sec). . . . . . . . . . . . . . . . . . . . +300°C Stresses beyond those listed under “Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS: 5V (VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, TA = +25°C, unless otherwise noted.) PARAMETER Input Offset Voltage Long-Term Input OffsetVoltage Stability SYMBOL VOS MAX478C/E MAX479C/E MIN TYP MAX MAX478ACP/CP/EP 30 70 40 MAX479ACP/CP/EP 35 100 UNITS 120 40 150 MAX478CS/ES 80 180 MAX479CS/ES 90 250 ∆VOS 0.5 Input Offset Current IOS 0.05 0.25 0.05 0.35 nA Input Bias Current IB 3 5 3 6 nA Input Noise Voltage en Input Noise Current in Input Noise Current Density Input Resistance RIN 0.6 µV ∆Time Input Noise Voltage Density 2 MAX478AC MAX479AC MIN TYP MAX CONDITIONS 0.1Hz to 10Hz (Note 1) 0.9 2.0 0.9 fo = 10Hz (Note 1) fo = 1000Hz (Note 1) 50 75 50 49 65 49 0.1Hz to 10Hz (Note 1) 1.5 2.5 1.5 fo = 10Hz (Note 1) fo = 1000Hz Differential mode (Note 1) 0.03 0.07 0.03 0.01 0.8 Common mode 2.0 0.01 0.6 12 2.0 12 µV/Mo. µVp-p nV/√Hz pAp-p pA/√Hz GΩ Upper limit 3.5 3.9 3.5 3.9 Lower limit 0 -0.3 0 -0.3 CMRR VCM = 0V to 3.5V 93 103 90 102 dB Power-Supply Rejection Ratio PSRR VS = 2.2V to 12V 94 104 92 104 dB AVOL VO = 0.03V to 4V, no load (Note 1) 140 700 110 700 Large-Signal Voltage Gain VO = 0.03V to 3.5V, RL = 50kΩ 80 200 70 200 Input Voltage Range VIN (CM) Common-Mode Rejection Ratio V V/mV _______________________________________________________________________________________ 17µA Max, Dual/Quad, Single-Supply, Precision Op Amps MAX478/MAX479 ELECTRICAL CHARACTERISTICS: 5V (continued) (VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, TA = +25°C, unless otherwise noted.) PARAMETER Output Voltage Swing Slew Rate SYMBOL VOUT SR Gain-Bandwidth Product Supply Current per Amplifier GBW IS Channel Separation Minimum Supply Voltage VS MAX478AC MAX479AC MIN TYP MAX MAX478C/E MAX479C/E MIN TYP MAX Output low, no load 6.5 9.0 6.5 9.0 Output low, 2kΩ to GND 0.2 0.6 0.2 0.6 120 160 120 160 CONDITIONS Output low, ISINK = 100µA Output high, no load 4.2 4.4 4.2 4.4 Output high, 2kΩ to GND 3.5 3.8 3.5 3.8 AV = +1, CL = 1pF (Note 1) 0.013 0.025 fO ≤ 5kHz mV V 0.013 0.025 60 UNITS V/µs 60 kHz 13 18 14 21 VS = ±1.5V, VO = 0V 12 17 13 20 ∆VIN = 3V, RL = 10kΩ 130 (Note 2) 2.0 µA 130 2.2 2.0 dB 2.2 V ELECTRICAL CHARACTERISTICS: 5V (VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, TA = 0°C to +70°C, unless otherwise noted.) PARAMETER Input Offset Voltage Input Offset Voltage Drift SYMBOL VOS ∆VOS ∆T MAX478AC MAX479AC MIN TYP MAX MAX478C MAX479C MIN TYP MAX MAX478ACP/CP 50 170 65 MAX479ACP/CP 60 200 70 290 MAX478CS 120 300 MAX479CS 130 400 0.6 3.0 0.8 4.5 CONDITIONS MAX47_ACP/CP (Note 1) 0.5 2.2 UNITS 250 µV µV/°C MAX47_CS (Note 1) Input Offset Current IOS 0.06 0.35 0.06 0.50 nA Input Bias Current IB 3 6 3 7 nA Common-Mode Rejection Ratio CMRR VCM = 0V to 3.4V 90 101 86 100 dB Power-Supply Rejection Ratio PSRR VS = 2.5V to 12V 90 102 88 102 dB Large-Signal Voltage Gain AVOL VO = 0.05V to 4V, no load (Note 1) 105 500 80 500 VO = 0.05V to 3.5V, RL = 50kΩ 55 160 45 160 V/mV Output low, no load Output Voltage Swing Supply Current per Amplifier VOUT IS Output low, ISINK = 100µA 8 11 8 11 140 190 140 190 Output high, no load 4.1 4.3 4.1 4.3 Output high, 2kΩ to GND 3.3 3.8 3.3 3.8 14 21 15 mV V 24 µA _______________________________________________________________________________________ 3 MAX478/MAX479 17µA Max, Dual/Quad, Single-Supply, Precision Op Amps ELECTRICAL CHARACTERISTICS: 5V (VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, TA = -40°C to +85°C, unless otherwise noted.) PARAMETER Input Offset Voltage Input Offset Voltage Drift SYMBOL VOS ∆VOS ∆T CONDITIONS MAX478EP MAX479EP MIN TYP MAX UNITS MAX478 80 315 150 400 MAX479 80 345 160 530 (Note 1) 0.6 3.0 0.8 4.5 µV/°C µV Input Offset Current IOS 0.07 0.7 0.07 0.7 nA Input Bias Current IB 4 8 4 8 nA Common-Mode Rejection Ratio CMRR VCM = 0.05V to 3.2V 84 98 84 98 dB Power-Supply Rejection Ratio PSRR VS = 3.0V to 12V 86 100 86 100 dB Large-Signal Voltage Gain AVOL VO = 0.05V to 4V, no load (Note 1) 55 350 55 350 VO = 0.05V to 3.5V, RL = 50kΩ 35 130 35 130 V/mV Output low, no load Output Voltage Swing Supply Current per Amplifier 4 MAX478ES MAX479ES MIN TYP MAX VOUT IS Output low, ISINK = 100µA 9 13 9 13 160 220 160 220 Output high, no load 3.9 4.2 3.9 4.2 Output high, 2kΩ to GND 3.0 3.7 3.0 3.7 15 27 15 _______________________________________________________________________________________ mV V 27 µA 17µA Max, Dual/Quad, Single-Supply, Precision Op Amps MAX478/MAX479 ELECTRICAL CHARACTERISTICS: 3V (VS = 3V, 0V, VCM = 0.1V, VO = 0.8V, TA = +25°C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MAX478AC MAX479AC MIN TYP MAX MAX478C/E MAX479C/E MIN TYP MAX MAX478ACP/CP/EP 30 90 40 140 MAX479ACP/CP/EP 35 120 40 170 80 200 90 270 UNITS Input Offset Voltage VOS Input Offset Current IOS 0.05 0.05 nA Input Bias Current IB 3 3 nA Input Noise Voltage eN 1.0 1.0 µVp-p Input Voltage Range VIN (CM) Common-Mode Rejection Ratio MAX478CS/ES MAX479CS/ES 0.1Hz to 10Hz µV Upper limit 1.7 1.9 1.7 1.9 Lower limit 0 -0.3 0 -0.3 CMRR VCM = 0V to 1.7V 93 103 90 102 dB Power-Supply Rejection Ratio PSRR VS = 2.2V to 12V 94 104 92 104 dB Large-Signal Voltage Gain AVOL VO = 0.03V to 2V, no load (Note 1) 100 600 100 600 VO = 0.03V to 1.5V, RL = 50kΩ 30 V/mV Output low, no load Output Voltage Swing Gain-Bandwidth Product VOUT GBW Supply Current per Amplifier IS Minimum Supply Voltage VS Output low, 2kΩ to GND 180 30 180 6 9 6 9 0.2 0.6 0.2 0.6 Output high, no load 2.2 2.4 2.2 2.4 Output high, 2kΩ to GND 1.8 2.0 1.8 2.0 fO ≤ 5kHz 50 12 17 13 mV V 50 2.2 With 300µV VOS degradation V kHz 20 µA 2.2 V 1.7 1.7 _______________________________________________________________________________________ 5 MAX478/MAX479 17µA Max, Dual/Quad, Single-Supply, Precision Op Amps ELECTRICAL CHARACTERISTICS: ±15V (VS = ±15V, TA = +25°C, unless otherwise noted.) PARAMETER CONDITIONS MAX478AC MAX479AC MIN TYP MAX MAX478C/E MAX479C/E MIN TYP MAX UNITS Input Offset Voltage VOS 80 350 100 480 µV Input Offset Current IOS 0.05 0.25 0.05 0.35 nA Input Bias Current IB 3 5 3 6 nA Upper limit 13.5 13.9 13.5 13.9 Lower limit -15.0 -15.3 -15.0 -15.3 Input Voltage Range VIN (CM) Common-Mode Rejection Ratio CMRR VCM = +13.5V, -15V 97 106 94 106 dB Power-Supply Rejection Ratio PSRR VS = 5V, 0V to ±15V 96 112 94 112 dB Large-Signal Voltage Gain AVOL VO = ±10V, RL = 50kΩ 300 1200 250 1000 VO = ±10V, no load 600 2500 400 2500 Output Voltage Swing VOUT RL = 50kΩ ±13.0 ±14.2 ±13.0 ±14.2 RL = 2kΩ ±11.0 ±12.7 ±11.0 ±12.7 0.02 0.04 0.02 0.04 Slew Rate Gain-Bandwidth Product Supply Current per Amplifer 6 SYMBOL SR GBW IS AV = +1V, CL = 15pF fO ≤ 5kHz 85 16 V V/mV V V/µs 85 21 17 _______________________________________________________________________________________ kHz 25 µA 17µA Max, Dual/Quad, Single-Supply, Precision Op Amps MAX478/MAX479 ELECTRICAL CHARACTERISTICS: ±15V (VS = ±15V, TA = 0°C to +70°C, unless otherwise noted.) PARAMETER Input Offset Voltage Input Offset-Voltage Drift SYMBOL CONDITIONS MAX478AC MAX479AC MIN TYP MAX MAX478C MAX479C MIN TYP MAX UNITS 100 480 130 660 µV 0.6 2.8 0.7 4.0 0.9 5.5 VOS ∆VOS ∆T MAX47_ACP/CP (Note 1) µV/°C MAX47_CS (Note 1) Input Offset Current IOS 0.06 0.35 0.06 0.35 nA Input Bias Current IB 3 6 3 7 nA Large-Signal Voltage Gain AVOL VO = ±10V, RL = 50kΩ 200 800 150 750 V/mV Common-Mode Rejection Ratio CMRR VCM = +13V, -15V 94 104 91 104 dB Power-Supply Rejection Ratio PSRR VS = 5V, 0V to ±15V 93 110 91 110 dB Output Voltage Swing VOUT RL = 5kΩ Supply Current per Amplifer IS ±11.0 ±13.5 17 ±11.0 ±13.5 24 18 V 28 µA _______________________________________________________________________________________ 7 MAX478/MAX479 17µA Max, Dual/Quad, Single-Supply, Precision Op Amps ELECTRICAL CHARACTERISTICS: ±15V (VS = ±15V, TA = -40°C to +85°C, unless otherwise noted.) PARAMETER Input Offset Voltage Input Offset-Voltage Drift CONDITIONS MAX478EP MAX479EP MIN TYP MAX MAX478ES MAX479ES MIN TYP MAX UNITS 130 740 130 740 µV 0.7 4.0 0.9 5.5 µV/°C VOS ∆VOS ∆T (Note 1) Input Offset Current IOS 0.07 0.70 0.07 0.70 nA Input Bias Current IB 4 8 4 8 nA Large-Signal Voltage Gain AVOL VO = ±10V, RL = 50kΩ 100 500 100 500 V/mV Common-Mode Rejection Ratio CMRR VCM = +13V, -14.9V 88 103 88 103 dB Power-Supply Rejection Ratio PSRR VS = 5V, 0V to ±15V 88 109 88 109 dB Output Voltage Swing VOUT RL = 5kΩ Supply Current per Amplifer Note 1: Note 2: 8 SYMBOL IS ±11.0 ±13.5 19 ±11.0 ±13.5 30 19 V 30 µA Guaranteed by design. Power-supply rejection ratio is measured at the minimum supply voltage. The op amps actually work at 1.7V supply, but with additional input offset-voltage skew. _______________________________________________________________________________________ 17µA Max, Dual/Quad, Single-Supply, Precision Op Amps VOLTAGE GAIN vs. FREQUENCY MINIMUM SUPPLY VOLTAGE 100 18 VS = ±15V 16 VS = 5V, 0V 14 12 VS = ±1.5V 140 TA = +25°C +25°C 0 120 +85°C VOLTAGE GAIN (dB) 20 OFFSET-VOLTAGE SHIFT (µV) SUPPLY CURRENT PER AMPLIFIER (µA) SUPPLY CURRENT vs. TEMPERATURE -100 -40°C -200 -300 100 VS = ±15V 80 60 VS = 5V, 0V 40 20 -400 0 NON-FUNCTIONAL 10 -500 -25 -50 25 0 50 75 -20 TEMPERATURE (°C) GAIN, PHASE vs. FREQUENCY 30 1 0 100 80 2 3 0.1 0.001 10 COMMON-MODE REJECTION RATIO vs. FREQUENCY POWER-SUPPLY REJECTION RATIO vs. FREQUENCY 120 0 160 200 GAIN 5V, 0V POSITIVE SUPPLY VS = ±15V 80 80 PSRR (dB) PHASE 5V, 0V 10 120 CMRR (dB) VOLTAGE GAIN (dB) PHASE ±15V PHASE SHIFT (DEGREES) TA = +25°C 20 VS = 5V, 0V NEGATIVE SUPPLY 40 40 VS = ±2.5V + 1Vp-p SINE WAVE TA = +25°C GAIN ±15V -10 10k 240 1M 100k 0 0 1 FREQUENCY (Hz) VOLTAGE GAIN vs. LOAD RESISTANCE 10M 1k 10k 0.1 100k 100k 10k 100k 1M LOAD RESISTANCE TO GROUND (Ω) 10M 10k 100k 1000 VS = 5V, 0V 60 40 AV = +5 ISINK = 1mA ISINK = 100µA 100 ISINK = 1µA 10 NO LOAD 10kΩ TO GROUND 1 2kΩ TO GROUND AV = +10 0 10k 1k OUTPUT SATURATION vs. TEMPERATURE 80 20 100 CAPACITIVE LOAD HANDLING SATURATION VOLTAGE (mV) OVERSHOOT (%) VS = 5V, 0V, TA = +85°C 10 FREQUENCY (Hz) AV = +1 VS = 5V, 0V, TA = +25°C 1 FREQUENCY (Hz) VS = 5V, 0V TA = +25°C 100 VS = ±15V, TA = +25°C VOLTAGE GAIN (V/V) 100 10 120 1M 100k FREQUENCY (Hz) 120 TA = +25°C 1k POSITIVE SUPPLY VOLTAGE (V) 0.1 10 100 1000 CAPACITIVE LOAD (pF) 10,000 -50 -25 0 25 50 75 100 TEMPERATURE (°C) _________________________________________________________________________________________________ 9 MAX478/MAX479 __________________________________________Typical Operating Characteristics ____________________________Typical Operating Characteristics (continued) 100 VOLTAGE NOISE 1/f CORNER 0.5Hz 30 10 10 VS = ±2.5V 0 VS = ±2.5V -10 10 100 1k 25 IB -3.0 -20 VS = ±15V -3.5 -4.0 0 FREQUENCY (Hz) IOS 50 1 -50 2 -25 LARGE-SIGNAL TRANSIENT RESPONSE VS = 5V, 0V 0V OUTPUT VOLTAGE (1V/div) LARGE-SIGNAL TRANSIENT RESPONSE VS = ±15V TIME (100µs/div) AV = +1, CL = 15pF SMALL-SIGNAL TRANSIENT RESPONSE VS = ±15V OUTPUT VOLTAGE (20mV/div) OUTPUT VOLTAGE (20mV/div) 100mV 50 75 100 0V TIME (20µs/div) AV = +1, CL = 15pF SMALL-SIGNAL TRANSIENT RESPONSE VS = 5V, 0V TIME (20µs/div) AV = +1, CL = 15pF 25 SMALL-SIGNAL TRANSIENT RESPONSE VS = ±2.5V 2V TIME (500µs/div) AV = +1, CL = 15pF 0 TEMPERATURE (°C) TIME FROM OUTPUT SHORT TO GROUND (MINUTES) OUTPUT VOLTAGE (20mV/div) 1 VS = 5V, 0V 75 -2.5 -30 0.1 10 100 INPUT OFFSET CURRENT (pA) CURRENT NOISE VS = 5V, 0V VS = ±15V INPUT BIAS CURRENT (nA) 20 VS = ±2.5V TA = +25°C SHORT-CIRCUIT CURRENT (mA) SINKING SOURCING VOLTAGE NOISE DENSITY (nV/√Hz) CURRENT NOISE DENSITY (fA/√Hz) 1000 300 INPUT BIAS AND OFFSET CURRENT vs. TEMPERATURE SHORT-CIRCUIT CURRENT NOISE SPECTRUM OUTPUT VOLTAGE (5V/div) MAX478/MAX479 17µA Max, Dual/Quad, Single-Supply, Precision Op Amps 0V TIME (20µs/div) AV = +1, CL = 15pF _______________________________________________________________________________________________ 17µA Max, Dual/Quad, Single-Supply, Precision Op Amps ___________________Chip Topograqhy V+ IN- 1/4MAX479 R1 OUTA R2 R3 1M 9.1M OUTB 1M 1/4MAX479 RG 200k R1 1M OUTPUT INB- INA- IN+ 1/4MAX479 R2 R3 1M 9.1M GAIN = (1 + 2R1) (R3) = 100 FOR VALUES SHOWN RG R2 0.111" (2.82mm) INA+ INB+ LOW-POWER INSTRUMENTATION AMPLIFIER V- V+ 0.079" (2.01mm) SOICN.EPS ________________________________________________________Package Information ______________________________________________________________________________________ 11 MAX478/MAX479 ________Typical Application Circuit __________________________________________Package Information (continued) PDIPN.EPS MAX478/MAX479 17µA Max, Dual/Quad, Single-Supply, Precision 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. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 1998 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.