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MAX479CSD

P1-P3P4-P6P7-P9P10-P12P13-P13
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
.
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
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-
OUTC
OUTB
INB-
INB+
A
D
B
C
A
B
_________________Pin Configurations
V2
V1
R3
R1
R2 R2
R1
+5V
V
OUT
MICROPOWER, HIGH INPUT IMPEDANCE DIFFERENTIAL
AMPLIFIER WITH VARIABLE GAIN IN 8-PIN DIP/SO
1/2MAX478
1/2MAX478
V
OUT
= (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 T
A
= +25°C, DC parameters only.
MAX478/MAX479
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 (T
A
= +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
(V
S
= 5V, 0V, V
CM
= 0.1V, V
O
= 1.4V, T
A
= +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
V
OS
MAX478ACP/CP/EP 30 70 40 120
µV
MAX479ACP/CP/EP 35 100 40 150
MAX478CS/ES 80 180
MAX479CS/ES 90 250
∆V
OS
∆Time
0.5 0.6 µV/Mo.
I
OS
0.05 0.25 0.05 0.35 nA
Input Bias Current
I
B
35 36 nA
Input Noise Voltage
e
n
0.1Hz to 10Hz (Note 1) 0.9 2.0 0.9
µV
p-p
Input Noise Voltage
Density
f
o
= 10Hz (Note 1) 50 75 50
nV/√Hz
f
o
= 1000Hz (Note 1) 49 65 49
Input Noise Current
i
n
0.1Hz to 10Hz (Note 1) 1.5 2.5 1.5
pA
p-p
Input Noise Current
Density
f
o
= 10Hz (Note 1) 0.03
pA/√Hz
f
o
= 1000Hz 0.01 0.01
Input Resistance
R
IN
Differential mode (Note 1) 0.8 2.0 0.6 2.0
GΩ
Common mode 12 12
Input Voltage Range
V
IN (CM)
Upper limit 3.5 3.9 3.5 3.9
V
Lower limit 0 -0.3 0 -0.3
CMRR
V
CM
= 0V to 3.5V
93 103 90 102 dB
Power-Supply
Rejection Ratio
PSRR
V
S
= 2.2V to 12V
94 104 92 104 dB
Large-Signal Voltage Gain
A
VOL
140 700 110 700
V/mV
V
O
= 0.03V to 3.5V, R
L
= 50kΩ
80 200 70 200
MAX478AC
MAX479AC
MIN TYP MAX
Long-Term Input Offset-
Voltage Stability
Input Offset Current
Common-Mode
Rejection Ratio
V
O
= 0.03V to 4V, no load
(Note 1)
0.03 0.07
P1-P3P4-P6P7-P9P10-P12P13-P13

MAX479CSD

Mfr. #:
Buy MAX479CSD
Manufacturer:
Maxim Integrated
Description:
Operational Amplifiers - Op Amps
Lifecycle:
New from this manufacturer.
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