User Manual

MAX478/MAX479
17µA Max, Dual/Quad, Single-Supply,
Precision Op Amps
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ELECTRICAL CHARACTERISTICS: 3V
(V
S
= 3V, 0V, V
CM
= 0.1V, V
O
= 0.8V, T
A
= +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
I
OS
90 270
0.05 0.05 nA
Input Bias Current
I
B
33nA
Common-Mode
Rejection Ratio
CMRR
V
CM
= 0V to 1.7V
93 103 90 102 dB
Input Offset Voltage
V
OS
MAX478ACP/CP/EP 30 90 40 140
µV
MAX479ACP/CP/EP 35 120 40 170
Power-Supply
Rejection Ratio
PSRR
V
S
= 2.2V to 12V
94 104 92 104 dB
Large-Signal
Voltage Gain
A
VOL
100 600 100 600
V/mV
MAX478CS/ES 80 200
V
O
= 0.03V to 1.5V, R
L
= 50kΩ
30 180 30 180
Output Voltage Swing
V
OUT
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
I
S
12 17 13 20 µA
Input Noise Voltage
e
N
0.1Hz to 10Hz 1.0 1.0
µV
p-p
Input Voltage Range
V
IN (CM)
Upper limit 1.7 1.9 1.7 1.9
V
Lower limit 0 -0.3
Gain-Bandwidth Product GBW
f
O
≤ 5kHz
50 50 kHz
Minimum Supply Voltage
V
S
2.2 2.2
V
V
O
= 0.03V to 2V, no load
(Note 1)
0 -0.3
With 300µV V
OS
degradation
1.7 1.7