AD8231 Datasheet, PDF (5/20 Pages) Analog Devices – Zero Drift, Digitally Programmable Instrumentation Amplifier

VS = 3.0 V, VREF = 1.5 V, TA = 25°C, G = 1, RL = 10 kΩ, unless otherwise noted.
Table 3.
Parameter
INSTRUMENTATION AMPLIFIER
OFFSET VOLTAGE
Input Offset, VOSI
Average Temperature Drift
Output Offset, VOSO
Average Temperature Drift
INPUT CURRENTS
Input Bias Current
Input Offset Current
GAINS
Gain Error
G=1
G = 2 to 128
Gain Drift
G=1
G = 2 to 128
CMRR
G=1
G=2
G=4
G=8
G = 16
G = 32
G = 64
G = 128
NOISE
Input Voltage Noise, eni
Output Voltage Noise, eno
OTHER INPUT CHARACTERISTICS
Common-Mode Input Impedance
Power Supply Rejection Ratio
Input Operating Voltage Range
REFERENCE INPUT
Input Impedance
Voltage Range
Conditions
VOS RTI = VOSI + VOSO/G
TA = −40°C to +125°C
TA = −40°C to +125°C
1, 2, 4, 8, 16, 32, 64, 128
en = √(eni2 + (eno/G)²)
VIN+, VIN− = 2.5 V, TA = 25°C
f = 1 kHz
f = 1 kHz, TA = −40°C
f = 1 kHz, TA = 125°C
f = 0.1 Hz to 10 Hz
f = 1 kHz
f = 1 kHz, TA = −40°C
f = 1 kHz, TA = 125°C
f = 0.1 Hz to 10 Hz
AD8231
Min Typ
Max Unit
4
15
μV
0.01 0.05 μV/°C
15
30
μV
0.05 0.5
μV/°C
250
500 pA
5
nA
20
100 pA
0.5
nA
3
3
80
86
92
98
104
110
110
110
0.05 %
0.8
%
10
ppm/°C
10
ppm/°C
dB
dB
dB
dB
dB
dB
dB
dB
40
nV/√Hz
35
nV/√Hz
48
nV/√Hz
0.8
μV p-p
72
nV/√Hz
62
nV/√Hz
83
nV/√Hz
1.4
μV p-p
10||5
GΩ||pF
100 110
dB
0.05
2.95 V
28
−0.2
kΩ||pF
+3.2 V
Rev. 0 | Page 5 of 20