AD8221
Rev. C | Page 3 of 24
SPECIFICATIONS
VS = ±15 V, VREF = 0 V, TA = 25°C, G = 1, RL = 2 kΩ, unless otherwise noted.
Table 1.
AR Grade
BR Grade
Parameter
Conditions
Min
Typ
Max
Min
Typ
Max
Unit
COMMON-MODE REJECTION RATIO
CMRR DC to 60 Hz with 1 kΩ
Source Imbalance
VCM = 10 V to +10 V
G = 1
80
90
dB
G = 10
100
110
dB
G = 100
120
130
dB
G = 1000
130
140
dB
CMRR at 10 kHz
VCM = 10 V to +10 V
G = 1
80
dB
G = 10
90
100
dB
G = 100
100
110
dB
G = 1000
100
110
dB
NOISE
RTI noise =
√eNI2 + (eNO/G)2
Voltage Noise, 1 kHz
Input Voltage Noise, eNI
VIN+, VIN, VREF = 0
8
nV/√Hz
Output Voltage Noise, eNO
75
nV/√Hz
RTI
f = 0.1 Hz to 10 Hz
G = 1
2
μV p-p
G = 10
0.5
μV p-p
G = 100 to 1000
0.25
μV p-p
Current Noise
f = 1 kHz
40
fA/√Hz
f = 0.1 Hz to 10 Hz
6
pA p-p
Input Offset, VOSI
VS = ±5 V to ±15 V
60
25
μV
Over Temperature
T = 40°C to +85°C
86
45
μV
Average TC
0.4
0.3
μV/°C
Output Offset, VOSO
VS = ±5 V to ±15 V
300
200
μV
Over Temperature
T = 40°C to +85°C
0.66
0.45
mV
Average TC
6
5
μV/°C
Offset RTI vs. Supply (PSR)
VS = ±2.3 V to ±18 V
G = 1
90
110
94
110
dB
G = 10
110
120
114
130
dB
G = 100
124
130
140
dB
G = 1000
130
140
150
dB
INPUT CURRENT
Input Bias Current
0.5
1.5
0.2
0.4
nA
Over Temperature
T = 40°C to +85°C
2.0
1
nA
Average TC
1
pA/°C
Input Offset Current
0.2
0.6
0.1
0.4
nA
Over Temperature
T = 40°C to +85°C
0.8
0.6
nA
Average TC
1
pA/°C
REFERENCE INPUT
RIN
20
kΩ
IIN
VIN+, VIN, VREF = 0
50
60
50
60
μA
Voltage Range
–VS
+VS
–VS
+VS
V
Gain to Output
1 ± 0.0001
V/V