Datasheet

AD8421 Data Sheet
Rev. 0 | Page 6 of 28
ARM Grade BRM Grade
Parameter
Test Conditions/
Comments
Min Typ Max Min Typ Max
Unit
Offset RTI vs. Supply (PSR) V
S
= ±2.5 V to ±18 V
G = 1 90 120 100 120 dB
G = 10 110 120 120 140 dB
G = 100 124 130 140 150 dB
G = 1000 130 140 140 150 dB
INPUT CURRENT
Input Bias Current 1 2 0.1 1 nA
Over Temperature T
A
= −40°C to +85°C 8 6 nA
Average TC 50 50 pA/°C
Input Offset Current 0.5 2 0.1 1 nA
Over Temperature T
A
= −40°C to +85°C 3 1.5 nA
Average TC 1 1 pA/°C
DYNAMIC RESPONSE
Small Signal Bandwidth −3 dB
G = 1 10 10 MHz
G = 10 10 10 MHz
G = 100 2 2 MHz
G = 1000 0.2 0.2 MHz
Settling Time 0.01% 10 V step
G = 1 0.7 0.7 μs
G = 10 0.4 0.4 μs
G = 100 0.6 0.6 μs
G = 1000 5 5 μs
Settling Time 0.001% 10 V step
G = 1 1 1 μs
G = 10 0.6 0.6 μs
G = 100 0.8 0.8 μs
G = 1000 6 6 μs
Slew Rate
G = 1 to 100 35 35 V/μs
GAIN
3
G = 1 + (9.9 kΩ/R
G
)
Gain Range 1 10,000 1 10,000 V/V
Gain Error V
OUT
= ±10 V
G = 1 0.05 0.02 %
G = 10 to 1000 0.3 0.2 %
Gain Nonlinearity V
OUT
= −10 V to +10 V
G = 1 R
L
≥ 2 kΩ 1 1 ppm
R
L
= 600 Ω 1 3 1 3 ppm
G = 10 to 1000 R
L
≥ 600 Ω 30 50 30 50 ppm
V
OUT
= −5 V to +5 V 5 10 5 10 ppm
Gain vs. Temperature
3
G = 1 5 0.1 1 ppm/°C
G > 1 −50 −50 ppm/°C
INPUT
Input Impedance
Differential 30||3 30||3 GΩ||pF
Common Mode 30||3 30||3 GΩ||pF
Input Operating Voltage
Range
4
V
S
= ±2.5 V to ±18 V −V
S
+ 2.3 +V
S
− 1.8 −V
S
+ 2.3 +V
S
− 1.8 V
Over Temperature T
A
= −40°C −V
S
+ 2.5 +V
S
− 2.0 −V
S
+ 2.5 +V
S
− 2.0 V
T
A
= +85°C −V
S
+ 2.1 +V
S
− 1.8 −V
S
+ 2.1 +V
S
− 1.8 V