AD8231ACPZ-WP datasheet(5/20 Pages) AD

Part #	AD8231ACPZ-WP

Description	Zero Drift, Digitally Programmable Instrumentation Amplifier

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AD8231

Rev. 0 | Page 5 of 20

VS = 3.0 V, VREF = 1.5 V, TA = 25°C, G = 1, RL = 10 kΩ, unless otherwise noted.

Table 3.

Parameter

Conditions

Min

Typ

Max

Unit

INSTRUMENTATION AMPLIFIER

OFFSET VOLTAGE

VOS RTI = VOSI + VOSO/G

Input Offset, VOSI

4

15

μV

Average Temperature Drift

0.01

0.05

μV/°C

Output Offset, VOSO

15

30

μV

Average Temperature Drift

0.05

0.5

μV/°C

INPUT CURRENTS

Input Bias Current

250

500

pA

TA = −40°C to +125°C

5

nA

Input Offset Current

20

100

pA

TA = −40°C to +125°C

0.5

nA

GAINS

1, 2, 4, 8, 16, 32, 64, 128

Gain Error

G = 1

0.05

%

G = 2 to 128

0.8

%

Gain Drift

G = 1

3

10

ppm/°C

G = 2 to 128

3

10

ppm/°C

CMRR

G = 1

80

dB

G = 2

86

dB

G = 4

92

dB

G = 8

98

dB

G = 16

104

dB

G = 32

110

dB

G = 64

110

dB

G = 128

110

dB

NOISE

en = √(eni2 + (eno/G)2)

VIN+, VIN− = 2.5 V, TA = 25°C

Input Voltage Noise, eni

f = 1 kHz

40

nV/√Hz

f = 1 kHz, TA = −40°C

35

nV/√Hz

f = 1 kHz, TA = 125°C

48

nV/√Hz

f = 0.1 Hz to 10 Hz

0.8

μV p-p

Output Voltage Noise, eno

f = 1 kHz

72

nV/√Hz

f = 1 kHz, TA = −40°C

62

nV/√Hz

f = 1 kHz, TA = 125°C

83

nV/√Hz

f = 0.1 Hz to 10 Hz

1.4

μV p-p

OTHER INPUT CHARACTERISTICS

Common-Mode Input Impedance

10||5

GΩ||pF

Power Supply Rejection Ratio

100

110

dB

Input Operating Voltage Range

0.05

2.95

V

REFERENCE INPUT

Input Impedance

28

kΩ||pF

Voltage Range

−0.2

+3.2

V

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