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19-0127; Rev. 1; 11/98
17A Max, Dual/Quad, Single-Supply, Precision Op Amps
_______________General Description
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, 17A max supply current per op amp, 70V max offset voltage, 2.2V/C max offset voltage drift (0.5V/C typ), and 250pA max input offset 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.
___________________________Features
o 17A Max Supply Current (MAX478A/MAX479A) o 70V Max Offset Voltage (MAX478A) o Single-Supply Operation: Input Voltage Range Includes Ground Output Swings to Ground While Sinking Current No Pull-Down Resistors Required o Dual Op Amp in 8-Pin DIP/SO Package (MAX478) Quad Op Amp in 14-Pin DIP/SO Package (MAX479) o 250pA Max Input Offset Current (MAX478A/MAX479A) o 0.5V/C Offset-Voltage Drift o Output Sources and Sinks 5mA Load Current
MAX478/MAX479
______________Ordering Information
PART MAX478ACPA MAX478CPA MAX478CSA MAX478C/D MAX478EPA MAX478ESA MAX479ACPD MAX479CPD MAX479CSD MAX479EPD MAX479ESD TEMP. RANGE 0C to +70C 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C 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
_______________________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
* Dice are specified at TA = +25C, DC parameters only.
_________________Pin Configurations
TOP VIEW
OUTA INA1 2 A B 8 7 6 5 V+ OUTB INBINB+
__________Typical Operating Circuit
R3 R1 R2 R2 R1
INA+ 3 V- 4
MAX478
DIP/SO
+5V
1/2MAX478
OUTA INA-
1 2 A D
14 OUTD 13 IND12 IND+
VOUT V2 V1
INA+ 3 V+ 4
MAX479
B C
11 V10 INC+ 9 8 INCOUTC
1/2MAX478
VOUT = (V1-V2) (1 + R1 R1 +2 ) R2 R3
INB+
5
INB- 6 OUTB 7
MICROPOWER, HIGH INPUT IMPEDANCE DIFFERENTIAL AMPLIFIER WITH VARIABLE GAIN IN 8-PIN DIP/SO
DIP/SO
________________________________________________________________ Maxim Integrated Products
1
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17A Max, Dual/Quad, Single-Supply, Precision Op Amps MAX478/MAX479
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 = +70C): 8-Pin Plastic DIP (derate 9.09mW/C above +70C) . . . . . 727mW 14-Pin Plastic DIP (derate 10.00mW/C above +70C) . . 800mW 14-Pin Wide SO (derate 9.52mW/C above +70C) . . . 762mW Operating Temperature Ranges: MAX47_ACP_/C_ _ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0C to +70C MAX47_E_ _ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40C to +85C Storage Temperature Range . . . . . . . . . . . . . . . . . . . -65C to +150C Lead Temperature (soldering, 10sec). . . . . . . . . . . . . . . . . . . . +300C
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 = +25C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MAX478ACP/CP/EP Input Offset Voltage VOS MAX479ACP/CP/EP MAX478CS/ES MAX479CS/ES Long-Term Input OffsetVoltage Stability Input Offset Current Input Bias Current Input Noise Voltage Input Noise Voltage Density Input Noise Current Input Noise Current Density Input Resistance Input Voltage Range Common-Mode Rejection Ratio Power-Supply Rejection Ratio Large-Signal Voltage Gain RIN VIN (CM) CMRR PSRR in VOS Time IOS IB en 0.1Hz to 10Hz (Note 1) fo = 10Hz (Note 1) fo = 1000Hz (Note 1) 0.1Hz to 10Hz (Note 1) fo = 10Hz (Note 1) fo = 1000Hz Differential mode (Note 1) Common mode Upper limit Lower limit VCM = 0V to 3.5V VS = 2.2V to 12V VO = 0.03V to 4V, no load (Note 1) VO = 0.03V to 3.5V, RL = 50k 3.5 0 93 94 140 80 0.5 0.05 3 0.9 50 49 1.5 0.03 0.01 0.8 2.0 12 3.9 -0.3 103 104 700 200 3.5 0 90 92 110 70 0.6 0.25 5 2.0 75 65 2.5 0.07 MAX478AC MAX479AC MIN TYP MAX 30 35 70 100 MAX478C/E MAX479C/E MIN TYP MAX 40 40 80 90 0.6 0.05 3 0.9 50 49 1.5 0.03 0.01 2.0 12 3.9 -0.3 102 104 700 V/mV 200 0.35 6 120 150 180 250 V/Mo. nA nA Vp-p nV/Hz pAp-p pA/Hz G V dB dB V UNITS
AVOL
2
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17A Max, Dual/Quad, Single-Supply, Precision Op Amps
ELECTRICAL CHARACTERISTICS: 5V (continued)
(VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, TA = +25C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS Output low, no load Output low, 2k to GND Output Voltage Swing VOUT Output low, ISINK = 100A Output high, no load Output high, 2k to GND Slew Rate Gain-Bandwidth Product Supply Current per Amplifier Channel Separation Minimum Supply Voltage VS SR GBW IS AV = +1, CL = 1pF (Note 1) fO 5kHz 4.2 3.5 MAX478AC MAX479AC MIN TYP MAX 6.5 0.2 120 4.4 3.8 9.0 0.6 160 4.2 3.5 MAX478C/E MAX479C/E MIN TYP MAX 6.5 0.2 120 4.4 3.8 V V/s kHz 21 A 12 130 2.0 2.2 17 13 130 2.0 2.2 20 dB V 9.0 0.6 160 mV UNITS
MAX478/MAX479
0.013 0.025 60 13 18
0.013 0.025 60 14
VS = 1.5V, VO = 0V VIN = 3V, RL = 10k (Note 2)
ELECTRICAL CHARACTERISTICS: 5V
(VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, TA = 0C to +70C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MAX478ACP/CP Input Offset Voltage VOS MAX479ACP/CP MAX478CS MAX479CS Input Offset Voltage Drift Input Offset Current Input Bias Current Common-Mode Rejection Ratio Power-Supply Rejection Ratio Large-Signal Voltage Gain VOS T IOS IB CMRR PSRR AVOL VCM = 0V to 3.4V VS = 2.5V to 12V VO = 0.05V to 4V, no load (Note 1) VO = 0.05V to 3.5V, RL = 50k Output low, no load Output Voltage Swing VOUT Output low, ISINK = 100A Output high, no load Output high, 2k to GND Supply Current per Amplifier IS 4.1 3.3 90 90 105 55 MAX47_ACP/CP (Note 1) MAX47_CS (Note 1) 0.06 3 101 102 500 160 8 140 4.3 3.8 14 21 11 190 4.1 3.3 0.35 6 86 88 80 45 0.5 2.2 MAX478AC MAX479AC MIN TYP MAX 50 60 170 200 MAX478C MAX479C MIN TYP MAX 65 70 120 130 0.6 0.8 0.06 3 100 102 500 V/mV 160 8 140 4.3 3.8 15 24 11 190 mV 250 290 300 400 3.0 V/C 4.5 0.50 7 nA nA dB dB V UNITS
V A
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17A Max, Dual/Quad, Single-Supply, Precision Op Amps MAX478/MAX479
ELECTRICAL CHARACTERISTICS: 5V
(VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, TA = -40C to +85C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MAX478 MAX479 (Note 1) MAX478EP MAX479EP MIN TYP MAX 80 80 0.6 0.07 4 VCM = 0.05V to 3.2V VS = 3.0V to 12V VO = 0.05V to 4V, no load (Note 1) VO = 0.05V to 3.5V, RL = 50k Output low, no load Output Voltage Swing VOUT Output low, ISINK = 100A Output high, no load Output high, 2k to GND Supply Current per Amplifier IS 3.9 3.0 84 86 55 35 98 100 350 130 9 160 4.2 3.7 15 27 13 220 3.9 3.0 315 345 3.0 0.7 8 84 86 55 35 MAX478ES MAX479ES MIN TYP MAX 150 160 0.8 0.07 4 98 100 350 V/mV 130 9 160 4.2 3.7 15 27 13 220 mV 400 V 530 4.5 0.7 8 V/C nA nA dB dB UNITS
Input Offset Voltage
VOS VOS T IOS IB CMRR PSRR AVOL
Input Offset Voltage Drift Input Offset Current Input Bias Current Common-Mode Rejection Ratio Power-Supply Rejection Ratio Large-Signal Voltage Gain
V A
4
_______________________________________________________________________________________
17A Max, Dual/Quad, Single-Supply, Precision Op Amps
ELECTRICAL CHARACTERISTICS: 3V
(VS = 3V, 0V, VCM = 0.1V, VO = 0.8V, TA = +25C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MAX478ACP/CP/EP Input Offset Voltage VOS MAX479ACP/CP/EP MAX478CS/ES MAX479CS/ES Input Offset Current Input Bias Current Input Noise Voltage Input Voltage Range Common-Mode Rejection Ratio Power-Supply Rejection Ratio Large-Signal Voltage Gain IOS IB eN VIN (CM) CMRR PSRR 0.1Hz to 10Hz Upper limit Lower limit VCM = 0V to 1.7V VS = 2.2V to 12V VO = 0.03V to 2V, no load (Note 1) VO = 0.03V to 1.5V, RL = 50k Output low, no load Output Voltage Swing VOUT Output low, 2k to GND Output high, no load Output high, 2k to GND Gain-Bandwidth Product Supply Current per Amplifier Minimum Supply Voltage GBW IS VS fO 5kHz 2.2 1.8 1.7 0 93 94 0.05 3 1.0 1.9 -0.3 103 104 1.7 0 90 92 MAX478AC MAX479AC MIN TYP MAX 30 35 90 120 MAX478C/E MAX479C/E MIN TYP MAX 40 40 80 90 0.05 3 1.0 1.9 -0.3 102 104 140 170 200 270 nA nA Vp-p V dB dB V UNITS
MAX478/MAX479
AVOL
100 30
600 180 6 0.2 2.4 2.0 50 12 17 2.2 9 0.6
100 30
600 V/mV 180 6 0.2 9 0.6 mV
2.2 1.8
2.4 2.0 50 13 20 2.2
V kHz A V
With 300V VOS degradation
1.7
1.7
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5
17A Max, Dual/Quad, Single-Supply, Precision Op Amps MAX478/MAX479
ELECTRICAL CHARACTERISTICS: 15V
(VS = 15V, TA = +25C, unless otherwise noted.) PARAMETER Input Offset Voltage Input Offset Current Input Bias Current Input Voltage Range Common-Mode Rejection Ratio Power-Supply Rejection Ratio Large-Signal Voltage Gain Output Voltage Swing Slew Rate Gain-Bandwidth Product Supply Current per Amplifer SYMBOL VOS IOS IB VIN (CM) CMRR PSRR AVOL VOUT SR GBW IS Upper limit Lower limit VCM = +13.5V, -15V VS = 5V, 0V to 15V VO = 10V, RL = 50k VO = 10V, no load RL = 50k RL = 2k AV = +1V, CL = 15pF fO 5kHz CONDITIONS MAX478AC MAX479AC MIN TYP MAX 80 0.05 3 13.5 13.9 -15.0 -15.3 97 96 106 112 350 0.25 5 MAX478C/E MAX479C/E MIN TYP MAX 100 0.05 3 13.5 13.9 -15.0 -15.3 94 94 106 112 480 0.35 6 UNITS V nA nA V dB dB V/mV
300 1200 600 2500 13.0 14.2 11.0 12.7 0.02 0.04 85 16 21
250 1000 400 2500 13.0 14.2 11.0 12.7 0.02 0.04 85 17 25
V V/s kHz A
6
_______________________________________________________________________________________
17A Max, Dual/Quad, Single-Supply, Precision Op Amps
ELECTRICAL CHARACTERISTICS: 15V
(VS = 15V, TA = 0C to +70C, unless otherwise noted.) MAX478AC MAX479AC MIN TYP MAX 100 MAX47_ACP/CP (Note 1) MAX47_CS (Note 1) 0.06 3 VO = 10V, RL = 50k VCM = +13V, -15V VS = 5V, 0V to 15V RL = 5k 200 94 93 800 104 110 0.35 6 150 91 91 0.6 480 2.8 MAX478C MAX479C MIN TYP MAX 130 0.7 0.9 0.06 3 750 104 110 660 4.0 V/C 5.5 0.35 7 nA nA V/mV dB dB V 28 A
MAX478/MAX479
PARAMETER Input Offset Voltage Input Offset-Voltage Drift Input Offset Current Input Bias Current Large-Signal Voltage Gain Common-Mode Rejection Ratio Power-Supply Rejection Ratio Output Voltage Swing Supply Current per Amplifer
SYMBOL VOS VOS T IOS IB AVOL CMRR PSRR VOUT IS
CONDITIONS
UNITS V
11.0 13.5 17 24
11.0 13.5 18
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7
17A Max, Dual/Quad, Single-Supply, Precision Op Amps MAX478/MAX479
ELECTRICAL CHARACTERISTICS: 15V
(VS = 15V, TA = -40C to +85C, unless otherwise noted.) MAX478EP MAX479EP MIN TYP MAX 130 (Note 1) 0.7 0.07 4 VO = 10V, RL = 50k VCM = +13V, -14.9V VS = 5V, 0V to 15V RL = 5k 100 88 88 500 103 109 740 4.0 0.70 8 100 88 88 MAX478ES MAX479ES MIN TYP MAX 130 0.9 0.07 4 500 103 109 740 5.5 0.70 8
PARAMETER Input Offset Voltage Input Offset-Voltage Drift Input Offset Current Input Bias Current Large-Signal Voltage Gain Common-Mode Rejection Ratio Power-Supply Rejection Ratio Output Voltage Swing Supply Current per Amplifer Note 1: Note 2:
SYMBOL VOS VOS T IOS IB AVOL CMRR PSRR VOUT IS
CONDITIONS
UNITS V V/C nA nA V/mV dB dB V
11.0 13.5 19 30
11.0 13.5 19 30
A
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.
8
_______________________________________________________________________________________
17A Max, Dual/Quad, Single-Supply, Precision Op Amps
__________________________________________Typical Operating Characteristics
SUPPLY CURRENT vs. TEMPERATURE
SUPPLY CURRENT PER AMPLIFIER (A) 20 18 OFFSET-VOLTAGE SHIFT (V) 100 0 +85C -100 -200 -300 -400 NON-FUNCTIONAL 10 -50 -25 0 25 50 75 100 TEMPERATURE (C) -500 0 1 2 3 POSITIVE SUPPLY VOLTAGE (V) -20 0.001 0.1 10 1k 100k FREQUENCY (Hz) -40C +25C VOLTAGE GAIN (dB)
MAX478/MAX479
MINIMUM SUPPLY VOLTAGE
140 120 100 80 60 40 20 0
VOLTAGE GAIN vs. FREQUENCY
TA = +25C
VS = 15V
16 VS = 5V, 0V
VS = 15V
14
VS = 5V, 0V
12
VS = 1.5V
GAIN, PHASE vs. FREQUENCY
30 TA = +25C VOLTAGE GAIN (dB) 20 PHASE 15V PHASE 5V, 0V 120 80
COMMON-MODE REJECTION RATIO vs. FREQUENCY
120 TA = +25C
PHASE SHIFT (DEGREES)
POWER-SUPPLY REJECTION RATIO vs. FREQUENCY
120 POSITIVE SUPPLY
10
160
CMRR (dB)
PSRR (dB)
80
VS = 15V
80
VS = 5V, 0V 40
NEGATIVE SUPPLY 40
0
GAIN 5V, 0V GAIN 15V
200
-10 10k
100k FREQUENCY (Hz)
240 1M
VS = 2.5V + 1Vp-p SINE WAVE TA = +25C 0 1 10 100 1k 10k 100k FREQUENCY (Hz) 0 0.1 1 10 100 1k 10k 100k FREQUENCY (Hz)
VOLTAGE GAIN vs. LOAD RESISTANCE
10M VS = 15V, TA = +25C VOLTAGE GAIN (V/V) OVERSHOOT (%) 1M VS = 5V, 0V, TA = +25C 100k VS = 5V, 0V, TA = +85C 120
CAPACITIVE LOAD HANDLING
VS = 5V, 0V TA = +25C SATURATION VOLTAGE (mV) AV = +1 80 60 40 20 1000
OUTPUT SATURATION vs. TEMPERATURE
VS = 5V, 0V 100 ISINK = 1A 10 NO LOAD 10k TO GROUND 1 2k TO GROUND 0.1 ISINK = 1mA ISINK = 100A
100
AV = +5 10 100
AV = +10 1000 10,000 -50 -25 0
10k 10k 100k 1M 10M LOAD RESISTANCE TO GROUND ()
0 CAPACITIVE LOAD (pF)
25
50
75
100
TEMPERATURE (C)
_________________________________________________________________________________________________
9
17A Max, Dual/Quad, Single-Supply, Precision Op Amps MAX478/MAX479
____________________________Typical Operating Characteristics (continued)
NOISE SPECTRUM
1000 SHORT-CIRCUIT CURRENT (mA) SINKING SOURCING VOLTAGE NOISE DENSITY (nV/Hz) CURRENT NOISE DENSITY (fA/Hz) VS = 2.5V TA = +25C 300 CURRENT NOISE 20
SHORT-CIRCUIT CURRENT
INPUT OFFSET CURRENT (pA) VS = 5V, 0V VS = 15V VS = 2.5V 0 VS = 2.5V 100
INPUT BIAS AND OFFSET CURRENT vs. TEMPERATURE
VS = 5V, 0V 75 50 25 IOS
10
100 VOLTAGE NOISE 30 1/f CORNER 0.5Hz
INPUT BIAS CURRENT (nA)
-10
-2.5 -3.0 -3.5 IB
-20 VS = 15V -30 0 1 2
10 0.1 1 10 FREQUENCY (Hz) 100 1k
-4.0 -50 -25 0 25 50 75 100 TEMPERATURE (C)
TIME FROM OUTPUT SHORT TO GROUND (MINUTES)
LARGE-SIGNAL TRANSIENT RESPONSE VS = 15V
LARGE-SIGNAL TRANSIENT RESPONSE VS = 5V, 0V
OUTPUT VOLTAGE (20mV/div)
SMALL-SIGNAL TRANSIENT RESPONSE VS = 2.5V
OUTPUT VOLTAGE (5V/div)
OUTPUT VOLTAGE (1V/div)
0V
2V
0V
TIME (500s/div) AV = +1, CL = 15pF
TIME (100s/div) AV = +1, CL = 15pF
TIME (20s/div) AV = +1, CL = 15pF
SMALL-SIGNAL TRANSIENT RESPONSE VS = 5V, 0V
SMALL-SIGNAL TRANSIENT RESPONSE VS = 15V
OUTPUT VOLTAGE (20mV/div)
OUTPUT VOLTAGE (20mV/div)
100mV
0V
TIME (20s/div) AV = +1, CL = 15pF
TIME (20s/div) AV = +1, CL = 15pF
10
_______________________________________________________________________________________________
17A Max, Dual/Quad, Single-Supply, Precision Op Amps
________Typical Application Circuit
IN-
___________________Chip Topograqhy
V+ OUTA OUTB
MAX478/MAX479
1/4MAX479
R1 1M
R2 1M
R3 9.1M
1/4MAX479
RG 200k OUTPUT INAR1 IN+ 1M R2 1M R3 9.1M INA+ INB+ INB0.111" (2.82mm)
1/4MAX479
GAIN = (1 + 2R1) (R3) = 100 FOR VALUES SHOWN RG R2
LOW-POWER INSTRUMENTATION AMPLIFIER
V0.079" (2.01mm)
V+
________________________________________________________Package Information
SOICN.EPS
______________________________________________________________________________________
11
17A Max, Dual/Quad, Single-Supply, Precision Op Amps MAX478/MAX479
__________________________________________Package Information (continued)
PDIPN.EPS
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 (c) 1998 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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