MAX479 Datasheet PDF - Maxim

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MAX479
Maxim

Part Number MAX479
Description 17A Max / Dual/Quad / Single-Supply / Precision Op Amps
Page 12 Pages


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19-0127; Rev. 1; 11/98
17µA Max, Dual/Quad, Single-Supply,
Precision Op Amps
_______________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, 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.
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
o 17µA Max Supply Current (MAX478A/MAX479A)
o 70µV 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 0.5µV/°C Offset-Voltage Drift
o Output Sources and Sinks 5mA Load Current
______________Ordering Information
PART
MAX478ACPA
MAX478CPA
MAX478CSA
MAX478C/D
MAX478EPA
MAX478ESA
MAX479ACPD
MAX479CPD
MAX479CSD
MAX479EPD
MAX479ESD
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
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
* Dice are specified at TA = +25°C, DC parameters only.
_________________Pin Configurations
__________Typical Operating Circuit
R3
R1
R2 R2
R1
1/2MAX478
+5V
VOUT
V2 1/2MAX478
V1
VOUT
=
(V1-V2)
(1
+
R1
R2
+
2
R1)
R3
MICROPOWER, HIGH INPUT IMPEDANCE DIFFERENTIAL
AMPLIFIER WITH VARIABLE GAIN IN 8-PIN DIP/SO
TOP VIEW
OUTA 1
INA- 2
INA+ 3
V- 4
A
MAX478
B
DIP/SO
8 V+
7 OUTB
6 INB-
5 INB+
OUTA 1
INA- 2
INA+ 3
V+ 4
INB+ 5
INB- 6
OUTB 7
14 OUTD
13 IND-
AD
12 IND+
MAX479
11 V-
10 INC+
BC
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.



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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
SYMBOL
CONDITIONS
Input Offset Voltage
MAX478ACP/CP/EP
VOS
MAX479ACP/CP/EP
MAX478CS/ES
MAX479CS/ES
MAX478AC
MAX479AC
MIN TYP MAX
30 70
35 100
MAX478C/E
MAX479C/E
MIN TYP MAX
40 120
40 150
80 180
90 250
UNITS
µV
Long-Term Input Offset-
Voltage Stability
VOS
Time
0.5 0.6 µV/Mo.
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
IOS
IB
en
in
RIN
VIN (CM)
CMRR
PSRR
AVOL
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
0.05 0.25
35
0.9 2.0
50 75
49 65
1.5 2.5
0.03 0.07
0.01
0.8 2.0
12
3.5 3.9
0 -0.3
93 103
94 104
140 700
80 200
0.05 0.35
36
0.9
50
49
1.5
0.03
0.01
0.6 2.0
12
3.5 3.9
0 -0.3
90 102
nA
nA
µVp-p
nV/Hz
pAp-p
pA/Hz
G
V
dB
92 104
dB
110 700
70 200
V/mV
2 _______________________________________________________________________________________



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17µA Max, Dual/Quad, Single-Supply,
Precision Op Amps
ELECTRICAL CHARACTERISTICS: 5V (continued)
(VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, TA = +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MAX478AC
MAX479AC
MIN TYP MAX
Output low, no load
6.5 9.0
Output Voltage Swing
VOUT
Output low, 2kto GND
Output low, ISINK = 100µA
Output high, no load
0.2 0.6
120 160
4.2 4.4
Output high, 2kto GND
3.5 3.8
Slew Rate
Gain-Bandwidth Product
Supply Current per
Amplifier
Channel Separation
SR
GBW
IS
AV = +1, CL = 1pF (Note 1)
fO 5kHz
VS = ±1.5V, VO = 0V
VIN = 3V, RL = 10k
0.013 0.025
60
13
12
130
18
17
Minimum Supply Voltage
VS (Note 2)
2.0 2.2
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
MAX478ACP/CP
50 170
Input Offset Voltage
MAX479ACP/CP
VOS MAX478CS
60 200
MAX479CS
Input Offset Voltage Drift
VOS
T
MAX47_ACP/CP (Note 1)
MAX47_CS (Note 1)
0.5 2.2
Input Offset Current
Input Bias Current
Common-Mode
Rejection Ratio
IOS
IB
CMRR
VCM = 0V to 3.4V
0.06 0.35
36
90 101
Power-Supply
Rejection Ratio
PSRR VS = 2.5V to 12V
90 102
Large-Signal
Voltage Gain
Output Voltage Swing
AVOL
VOUT
VO = 0.05V to 4V, no load (Note 1)
VO = 0.05V to 3.5V, RL = 50k
Output low, no load
Output low, ISINK = 100µA
Output high, no load
105 500
55 160
8
140
4.1 4.3
11
190
Output high, 2kto GND
Supply Current per Amplifier
IS
3.3 3.8
14
21
MAX478C/E
MAX479C/E
MIN TYP MAX
6.5 9.0
0.2 0.6
120 160
4.2 4.4
3.5 3.8
0.013 0.025
60
14 21
13 20
130
2.0 2.2
MAX478C
MAX479C
MIN TYP MAX
65 250
70 290
120 300
130 400
0.6 3.0
0.8 4.5
0.06 0.50
37
86 100
88 102
80 500
45 160
8 11
140 190
4.1 4.3
3.3 3.8
15 24
UNITS
mV
V
V/µs
kHz
µA
dB
V
UNITS
µV
µV/°C
nA
nA
dB
dB
V/mV
mV
V
µA
_______________________________________________________________________________________ 3



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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
SYMBOL
CONDITIONS
MAX478EP
MAX479EP
MIN TYP MAX
Input Offset Voltage
MAX478
VOS
MAX479
80 315
80 345
Input Offset Voltage Drift
VOS
T
(Note 1)
0.6 3.0
Input Offset Current
Input Bias Current
Common-Mode
Rejection Ratio
IOS
IB
CMRR
VCM = 0.05V to 3.2V
0.07 0.7
48
84 98
Power-Supply
Rejection Ratio
Large-Signal
Voltage Gain
Output Voltage Swing
PSRR
AVOL
VOUT
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 low, ISINK = 100µA
Output high, no load
86 100
55 350
35 130
9 13
160 220
3.9 4.2
Output high, 2kto GND
Supply Current per Amplifier
IS
3.0 3.7
15
27
MAX478ES
MAX479ES
MIN TYP MAX
150 400
160 530
0.8 4.5
0.07 0.7
48
84 98
86 100
55 350
35 130
9 13
160 220
3.9 4.2
3.0 3.7
15 27
UNITS
µV
µV/°C
nA
nA
dB
dB
V/mV
mV
V
µA
4 _______________________________________________________________________________________



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