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PDF MAX479 Data sheet ( Hoja de datos )
| Número de pieza | MAX479 | |
| Descripción | 17A Max / Dual/Quad / Single-Supply / Precision Op Amps | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX479 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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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.
1 page  
17µA Max, Dual/Quad, Single-Supply,
Precision Op Amps
ELECTRICAL CHARACTERISTICS: 3V
(VS = 3V, 0V, VCM = 0.1V, VO = 0.8V, TA = +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
Input Offset Voltage
Input Offset Current
Input Bias Current
Input Noise Voltage
Input Voltage Range
Common-Mode
Rejection Ratio
Power-Supply
Rejection Ratio
VOS
IOS
IB
eN
VIN (CM)
CMRR
MAX478ACP/CP/EP
MAX479ACP/CP/EP
MAX478CS/ES
MAX479CS/ES
0.1Hz to 10Hz
Upper limit
Lower limit
VCM = 0V to 1.7V
PSRR VS = 2.2V to 12V
MAX478AC
MAX479AC
MIN TYP MAX
30 90
35 120
0.05
3
1.0
1.7 1.9
0 -0.3
93 103
94 104
MAX478C/E
MAX479C/E
MIN TYP MAX
40 140
40 170
80 200
90 270
0.05
3
1.0
1.7 1.9
0 -0.3
90 102
UNITS
µV
nA
nA
µVp-p
V
dB
92 104
dB
Large-Signal
Voltage Gain
Output Voltage Swing
Gain-Bandwidth Product
Supply Current per Amplifier
Minimum Supply Voltage
AVOL
VOUT
GBW
IS
VS
VO = 0.03V to 2V, no load
(Note 1)
VO = 0.03V to 1.5V, RL = 50kΩ
Output low, no load
Output low, 2kΩ to GND
Output high, no load
Output high, 2kΩ to GND
fO ≤ 5kHz
With 300µV VOS degradation
100 600
30 180
6
0.2
2.2 2.4
1.8 2.0
50
12
1.7
9
0.6
17
2.2
100 600
30 180
6
0.2
2.2 2.4
1.8 2.0
50
13
1.7
9
0.6
20
2.2
V/mV
mV
V
kHz
µA
V
_______________________________________________________________________________________ 5
5 Page 
17µA Max, Dual/Quad, Single-Supply,
Precision Op Amps
________Typical Application Circuit
IN-
1/4MAX479 R2
R3
1M
R1 1M
9.1M
1/4MAX479
___________________Chip Topograqhy
V+
OUTA
OUTB
RG 200k
OUTPUT
R1 1M
R2
R3
IN+ 1M 9.1M
1/4MAX479
GAIN = (1 + 2RRG1) (RR32) = 100 FOR VALUES SHOWN
LOW-POWER INSTRUMENTATION AMPLIFIER
INA-
INA+
INB-
0.111"
(2.82mm)
INB+
V- V+
0.079"
(2.01mm)
________________________________________________________Package Information
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MAX479.PDF ] | |
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