Datasheet

AD8422 Data Sheet
Rev. 0 | Page 6 of 24
Test Conditions/
Comments
AD8422ARMZ AD8422BRMZ
Parameter Min Typ Max Min Typ Max Unit
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
REFERENCE INPUT
R
IN
20 20 kΩ
I
IN
V
IN+
, V
IN−
, V
REF
= 0 V 35 50 35 50 µA
Voltage Range −V
S
+V
S
−V
S
+V
S
V
Gain to Output 1 1 V/V
DYNAMIC RESPONSE
Small Signal −3 dB Bandwidth
G = 1 2200 2200 kHz
G = 10 850 850 kHz
G = 100
120
120
kHz
G = 1000 12 12 kHz
Settling Time 0.01% 10 V step
G = 1 13 13 µs
G = 10 13 13 µs
G = 100 12 12 µs
G = 1000 80 80 µs
Settling Time 0.001% 10 V step
G = 1 15 15 µs
G = 10 15 15 µs
G = 100 15 15 µs
G = 1000 160 160 µs
Slew Rate G = 1 to 100 0.8 0.8 V/µs
GAIN
3
G = 1 + (19.8 kΩ/R
G
)
Gain Range 1 1000 1 1000 V/V
Gain Error V
OUT
± 10 V
G = 1 0.03 0.01 %
G = 10
0.2
0.04
%
G = 100 0.2 0.04 %
G = 1000 0.2 0.04 %
Gain Nonlinearity V
OUT
= −10 V to +10 V
G = 1
R
L
= 2 kΩ
0.5
5
0.5
5
ppm
G = 10 2 5 2 5 ppm
G = 100 4 10 4 10 ppm
G = 1000 10 20 10 20 ppm
Gain vs. Temperature
G = 1 5 1 ppm/°C
G > 1
−80
−80
ppm/°C