Datasheet

Data Sheet AD8422
Rev. 0 | Page 3 of 24
SPECIFICATIONS
SOIC PACKAGE
V
S
= ±15 V, V
REF
= 0 V, T
A
= 25°C, G = 1, R
L
= 2 kΩ, unless otherwise noted.
Table 1.
Test Conditions/
Comments
AD8422ARZ AD8422BRZ
Parameter Min Typ Max Min Typ Max Unit
COMMON-MODE REJECTION RATIO
CMRR DC to 60 Hz with 1 kΩ
Source Imbalance
V
CM
= −10 V to +10 V
G = 1 86 94 dB
G = 10 106 114 dB
G = 100 126 134 dB
G = 1000 146 150 dB
Over Temperature, G=1 T = −40°C to +85°C 83 89 dB
CMRR at 7 kHz V
CM
= −10 V to +10 V
G = 1 80 80 dB
G = 10 90 95 dB
G = 100 100 100 dB
G = 1000
100
100
dB
NOISE
1
Voltage Noise, 1 kHz
Input Voltage Noise, e
NI
V
IN+
, V
IN−
, V
REF
= 0 V 8 8 nV/√Hz
Output Voltage Noise, e
NO
80 80 nV/√Hz
Peak to Peak, RTI f = 0.1 Hz to 10 Hz
G = 1
2
2
µV p-p
G = 10 0.5 0.5 µV p-p
G = 100 to 1000 0.15 0.15 µV p-p
Current Noise
f = 1 kHz
90
90
110
fA/√Hz
f = 0.1 Hz to 10 Hz 8 8 pA p-p
VOLTAGE OFFSET
2
Input Offset, V
OSI
V
S
= ±1.8 V to ±15 V 60 25 µV
Over Temperature T = −40°C to +85°C 70 40 µV
Average Temperature
Coefficient
0.4 0.3 µV/°C
Output Offset, V
OSO
V
S
= ±1.8 V to ±15 V 300 150 µV
Over Temperature T = −40°C to +85°C 500 300 µV
Average Temperature
Coefficient
5 2 µV/°C
Offset RTI vs. Supply (PSR) V
S
= ±1.8 V to ±18 V
G = 1 90 110 100 120 dB
G = 10
110
130
120
140
dB
G = 100 124 150 140 160 dB
G = 1000 130 150 140 160 dB
INPUT CURRENT
Input Bias Current V
S
= ±1.8 V to ±15 V 0.5 1 0.2 0.5 nA
Over Temperature
T = −40°C to +85°C
2
1
nA
Average Temperature
Coefficient
4 4 pA/°C
Input Offset Current V
S
= ±1.8 V to ±15 V 0.2 0.3 0.1 0.15 nA
Over Temperature T = −40°C to +85°C 0.8 0.3 nA
Average Temperature
Coefficient
1
1
pA/°C