MAX479CSD

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Not Recommended for New Designs This product was manufactured for Maxim by an outside wafer foundry using a process that is no longer available. It is not recommended for new designs. The data sheet remains available for existing users. A Maxim replacement or an industry second-source may be available. Please see the QuickView data sheet for this part or contact technical support for assistance. For further information, contact Maxim’s Applications Tech Support.

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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. M A X 4 7 8 /M A X 4 7 9 17µA Max, Dual/Quad, Single-Supply, Precision Op Amps ________________________________________________________________ Maxim Integrated Products 1 1 2 3 4 8 7 6 5 V+ OUTB INB- INB+V- INA+ INA- OUTA MAX478 DIP/SO TOP VIEW 1 2 3 4 14 13 12 11 OUTD IND- IND+ V-V+ INA+ INA- OUTA MAX479 DIP/SO 5 6 7 10 9 8 INC+ INC- OUTCOUTB INB- INB+ A D B C A B _________________Pin Configurations V2 V1 R3 R1 R2 R2 R1 +5V VOUT MICROPOWER, HIGH INPUT IMPEDANCE DIFFERENTIAL AMPLIFIER WITH VARIABLE GAIN IN 8-PIN DIP/SO 1/2MAX478 1/2MAX478 VOUT = (V1-V2) (1 + R1 + 2 R1 ) R2 R3 __________Typical Operating Circuit 19-0127; Rev. 1; 11/98 _______________General Description The MAX478 and MAX479 are dual and quad micro- power, precision op amps available in 8-pin and 14-pin DIP and small-outline packages, respectively. Both devices feature an extremely low, 17 µA 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. The MAX478 and MAX479 operate from a single sup- ply. 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 sup- ply operation, with guaranteed specifications at each supply voltage. Specifications for ±15V operation are also provided. _______________________Applications Battery- or Solar-Powered Systems: Portable Instrumentation Remote Sensor Amplifier Satellite Circuitry Micropower Sample-and-Hold Thermocouple Amplifier Micropower Filters Single Lithium Cell Powered Systems ___________________________Features ♦ 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 ______________Ordering Information PART TEMP. RANGE PIN-PACKAGE MAX478ACPA 0°C to +70°C 8 Plastic DIP MAX478CPA 0°C to +70°C 8 Plastic DIP MAX478CSA 0°C to +70°C 8 SO MAX478C/D 0°C to +70°C Dice* MAX478EPA -40°C to +85°C 8 Plastic DIP MAX478ESA -40°C to +85°C 8 SO MAX479ACPD 0°C to +70°C 14 Plastic DIP MAX479CPD 0°C to +70°C 14 Plastic DIP MAX479CSD 0°C to +70°C 14 SO MAX479EPD -40°C to +85°C 14 Plastic DIP MAX479ESD -40°C to +85°C 14 SO * Dice are specified at TA = +25°C, DC parameters only.

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M A X 4 7 8 /M A X 4 7 9 17µA Max, Dual/Quad, Single-Supply, Precision Op Amps 2 _______________________________________________________________________________________ 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 ELECTRICAL CHARACTERISTICS: 5V (VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, TA = +25°C, unless otherwise noted.) Stresses beyond those listed under “Absolute Maximum Ratings" may cause permanent damage to the device. These are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL CONDITIONS MAX478C/E MAX479C/E MIN TYP MAX UNITS Input Offset Voltage VOS MAX478ACP/CP/EP 30 70 40 120 µV MAX479ACP/CP/EP 35 100 40 150 MAX478CS/ES 80 180 MAX479CS/ES 90 250 ∆ VOS ∆ Time 0.5 0.6 µV/Mo. IOS 0.05 0.25 0.05 0.35 nA Input Bias Current IB 3 5 3 6 nA Input Noise Voltage en 0.1Hz to 10Hz (Note 1) 0.9 2.0 0.9 µVp-p Input Noise Voltage Density fo = 10Hz (Note 1) 50 75 50 nV/√Hz fo = 1000Hz (Note 1) 49 65 49 Input Noise Current in 0.1Hz to 10Hz (Note 1) 1.5 2.5 1.5 pAp-p Input Noise Current Density fo = 10Hz (Note 1) 0.03 pA/√Hz fo = 1000Hz 0.01 0.01 Input Resistance RIN Differential mode (Note 1) 0.8 2.0 0.6 2.0 GΩ Common mode 12 12 Input Voltage Range VIN (CM) Upper limit 3.5 3.9 3.5 3.9 V 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 Large-Signal Voltage Gain AVOL 140 700 110 700 V/mV VO = 0.03V to 3.5V, RL = 50kΩ 80 200 70 200 MAX478AC MAX479AC MIN TYP MAX Long-Term Input Offset- Voltage Stability Input Offset Current Common-Mode Rejection Ratio VO = 0.03V to 4V, no load (Note 1) 0.03 0.07

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M A X 4 7 8 /M A X 4 7 9 17µA Max, Dual/Quad, Single-Supply, Precision Op Amps _______________________________________________________________________________________ 3 PARAMETER SYMBOL CONDITIONS MAX478AC MAX479AC MIN TYP MAX MAX478C/E MAX479C/E MIN TYP MAX UNITS Output Voltage Swing VOUT Output low, no load 6.5 9.0 6.5 9.0 mVOutput low, 2kΩ to GND 0.2 0.6 0.2 0.6 Output low, ISINK = 100µA 120 160 120 160 4.2 4.4 V Output high, 2kΩ to GND 3.5 3.8 3.5 3.8 Slew Rate SR AV = +1, CL = 1pF (Note 1) 0.013 0.025 0.013 0.025 V/µs Gain-Bandwidth Product GBW fO ≤ 5kHz 60 60 kHz Channel Separation ∆ VIN = 3V, RL = 10kΩ 130 130 dB Minimum Supply Voltage VS (Note 2) 2.0 2.2 2.0 2.2 V IS 13 18 14 21 µA Supply Current per Amplifier VS = ±1.5V, VO = 0V 12 17 13 20 Output high, no load ELECTRICAL CHARACTERISTICS: 5V (continued) (VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, TA = +25°C, unless otherwise noted.) 4.2 4.4 ELECTRICAL CHARACTERISTICS: 5V (VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, TA = 0°C to +70°C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MAX478AC MAX479AC MIN TYP MAX MAX478C MAX479C MIN TYP MAX UNITS MAX479CS 130 400 Input Offset Voltage VOS MAX478ACP/CP 50 170 65 250 µV MAX479ACP/CP 60 200 70 290 MAX478CS 120 300 Input Offset Voltage Drift ∆ VOS ∆ T MAX47_ACP/CP (Note 1) 0.5 2.2 0.6 3.0 µV/°C MAX47_CS (Note 1) 0.8 4.5 Input Offset Current IOS 0.06 0.35 0.06 0.50 nA Input Bias Current IB 3 6 3 7 nA 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 105 500 80 500 V/mV 55 160 45 160 Output Voltage Swing VOUT Output low, no load 8 11 8 11 mV Output low, ISINK = 100µA 140 190 140 190 Output high, no load 4.1 4.3 4.1 4.3 V Output high, 2kΩ to GND 3.3 3.8 3.3 3.8 Supply Current per Amplifier IS 14 21 15 24 µA Common-Mode Rejection Ratio VO = 0.05V to 4V, no load (Note 1) VO = 0.05V to 3.5V, RL = 50kΩ

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M A X 4 7 8 /M A X 4 7 9 17µA Max, Dual/Quad, Single-Supply, Precision Op Amps 4 _______________________________________________________________________________________ ELECTRICAL CHARACTERISTICS: 5V (VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, TA = -40°C to +85°C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MAX478EP MAX479EP MIN TYP MAX MAX478ES MAX479ES MIN TYP MAX UNITS Input Offset Voltage Drift ∆ VOS ∆ T (Note 1) 0.6 3.0 0.8 4.5 µV/°C 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 Input Offset Voltage VOS MAX478 80 315 150 400 µV 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 V/mV MAX479 80 345 160 530 VO = 0.05V to 3.5V, RL = 50kΩ 35 130 35 130 Output Voltage Swing VOUT Output low, no load 9 13 9 13 mV Output low, ISINK = 100µA 160 220 160 220 Output high, no load 3.9 4.2 3.9 4.2 V Output high, 2kΩ to GND 3.0 3.7 3.0 3.7 Supply Current per Amplifier IS 15 27 15 27 µA

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M A X 4 7 8 /M A X 4 7 9 17µA Max, Dual/Quad, Single-Supply, Precision Op Amps _______________________________________________________________________________________ 5 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 UNITS MAX479CS/ES Input Offset Current IOS 90 270 0.05 0.05 nA Input Bias Current IB 3 3 nA Common-Mode Rejection Ratio CMRR VCM = 0V to 1.7V 93 103 90 102 dB Input Offset Voltage VOS MAX478ACP/CP/EP 30 90 40 140 µV MAX479ACP/CP/EP 35 120 40 170 Power-Supply Rejection Ratio PSRR VS = 2.2V to 12V 94 104 92 104 dB Large-Signal Voltage Gain AVOL 100 600 100 600 V/mV MAX478CS/ES 80 200 VO = 0.03V to 1.5V, RL = 50kΩ 30 180 30 180 Output Voltage Swing VOUT Output low, no load 6 9 6 9 mV Output low, 2kΩ to GND 0.2 0.6 0.2 0.6 Output high, no load 2.2 2.4 2.2 2.4 V Output high, 2kΩ to GND 1.8 2.0 1.8 2.0 Supply Current per Amplifier IS 12 17 13 20 µA Input Noise Voltage eN 0.1Hz to 10Hz 1.0 1.0 µVp-p Input Voltage Range VIN (CM) Upper limit 1.7 1.9 1.7 1.9 V Lower limit 0 -0.3 Gain-Bandwidth Product GBW fO ≤ 5kHz 50 50 kHz Minimum Supply Voltage VS 2.2 2.2 V VO = 0.03V to 2V, no load (Note 1) 0 -0.3 With 300µV VOS degradation 1.7 1.7

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M A X 4 7 8 /M A X 4 7 9 17µA Max, Dual/Quad, Single-Supply, Precision Op Amps 6 _______________________________________________________________________________________ ELECTRICAL CHARACTERISTICS: ±15V (VS = ±15V, TA = +25°C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MAX478AC MAX479AC MIN TYP MAX MAX478C/E MAX479C/E MIN TYP MAX UNITS Input Voltage Range VIN (CM) Upper limit 13.5 13.9 13.5 13.9 V Lower limit -15.0 -15.3 Input Offset Current IOS -15.0 -15.3 0.05 0.25 0.05 0.35 nA Input Bias Current IB 3 5 3 6 nA Common-Mode Rejection Ratio CMRR VCM = +13.5V, -15V 97 106 94 106 dB Slew Rate SR AV = +1V, CL = 15pF Power-Supply Rejection Ratio PSRR VS = 5V, 0V to ±15V 96 112 94 112 dB 0.02 0.04 0.02 0.04 V/µs 16 21 17 25 Gain-Bandwidth Product GBW fO ≤ 5kHz 85 85 kHz Input Offset Voltage VOS 80 350 100 480 µV ISSupply Current per Amplifier µA Large-Signal Voltage Gain AVOL VO = ±10V, RL = 50kΩ 300 1200 250 1000 V/mV VO = ±10V, no load 600 2500 400 2500 Output Voltage Swing VOUT RL = 50kΩ ±13.0 ±14.2 ±13.0 ±14.2 V RL = 2kΩ ±11.0 ±12.7 ±11.0 ±12.7

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M A X 4 7 8 /M A X 4 7 9 17µA Max, Dual/Quad, Single-Supply, Precision Op Amps _______________________________________________________________________________________ 7 ELECTRICAL CHARACTERISTICS: ±15V (VS = ±15V, TA = 0°C to +70°C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MAX478AC MAX479AC MIN TYP MAX MAX478C MAX479C MIN TYP MAX UNITS ISSupply Current per Amplifier MAX47_ACP/CP (Note 1) 0.6 2.8 0.7 4.0 Input Offset-Voltage Drift ∆ VOS ∆ T MAX47_CS (Note 1) 0.9 5.5 µV/°C Large-Signal Voltage Gain AVOL VO = ±10V, RL = 50kΩ 200 800 150 750 V/mV µA Power-Supply Rejection Ratio PSRR VS = 5V, 0V to ±15V 93 110 91 110 dB Input Offset Voltage VOS 100 480 130 660 17 24 18 28 µV Input Bias Current IB 3 6 3 7 nA Common-Mode Rejection Ratio CMRR VCM = +13V, -15V 94 104 91 104 dB Output Voltage Swing VOUT RL = 5kΩ ±11.0 ±13.5 ±11.0 ±13.5 V Input Offset Current IOS 0.06 0.35 0.06 0.35 nA

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M A X 4 7 8 /M A X 4 7 9 17µA Max, Dual/Quad, Single-Supply, Precision Op Amps 8 _______________________________________________________________________________________ ELECTRICAL CHARACTERISTICS: ±15V (VS = ±15V, TA = -40°C to +85°C, unless otherwise noted.) Note 1: Guaranteed by design. Note 2: 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. PARAMETER SYMBOL CONDITIONS MAX478EP MAX479EP MIN TYP MAX MAX478ES MAX479ES MIN TYP MAX UNITS Output Voltage Swing VOUT RL = 5kΩ ±11.0 ±13.5 ±11.0 ±13.5 V Common-Mode Rejection Ratio CMRR VCM = +13V, -14.9V 88 103 88 103 dB ISSupply Current per Amplifier Input Offset Current IOS (Note 1) 0.7 4.0 0.9 5.5Input Offset-Voltage Drift ∆ VOS ∆ T µV/°C Large-Signal Voltage Gain AVOL VO = ±10V, RL = 50kΩ 100 500 100 500 V/mV Input Bias Current µA 0.07 0.70 0.07 0.70 nA IB Power-Supply Rejection Ratio PSRR VS = 5V, 0V to ±15V 88 109 88 109 dB Input Offset Voltage VOS 4 8 4 8 nA 130 740 130 740 19 30 19 30 µV