Datasheet

Data Sheet AD8422
Rev. 0 | Page 5 of 24
Test Conditions/
Comments
AD8422ARZ AD8422BRZ
Parameter Min Typ Max Min Typ Max Unit
POWER SUPPLY
Operating Range
Dual-supply operation
±1.8
±18
±1.8
±18
V
Single-supply
operation
3.6 36 3.6 36 V
Quiescent Current 300 330 300 330 µA
Over Temperature T = −40°C to +85°C 400 400 µA
TEMPERATURE RANGE
Specified Performance –40 +85 –40 +85 °C
Operating Range
6
–40 +125 –40 +125 °C
1
Total RTI noise = √
e
NI
2
+ (e
NO
/G)
2
2
Total RTI V
OS
= (V
OSI
) + (V
OSO
/G).
3
Gain does not include the effects of the external resistor, R
G
.
4
One input grounded. G = 1.
5
Output current limited at cold temperatures. See Figure 35.
6
See Typical Performance Characteristics for expected operation between 85°C and 125°C.
MSOP PACKAGE
V
S
= ±15 V, V
REF
= 0 V, T
A
= 25°C, G = 1, R
L
= 2 kΩ, unless otherwise noted.
Table 2.
Test Conditions/
Comments
AD8422ARMZ
AD8422BRMZ
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 90 dB
G = 10 106 110 dB
G = 100 126 130 dB
G = 1000 146 150 dB
Over Temperature, G = 1 T = −40°C to +85°C 83 86
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 70 50 µV
Over Temperature T = −40°C to +85°C 110 75 µV
Average Temperature
Coefficient
0.6 0.4 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