AD8231ACPZ-R7 datasheet(4/25 Pages) AD

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Data Sheet

AD8231

SPECIFICATIONS

VS = 5 V, VREF = 2.5 V, G = 1, RL = 10 kΩ, TA = 25°C, unless otherwise noted.

Table 2.

Parameter

Conditions

Min

Typ

Max

Unit

INSTRUMENTATION AMPLIFIER

Offset Voltage

VOS RTI = VOSI + VOSO/G

Input Offset, VOSI

µV

Average Temperature Drift

TA = −40°C to +125°C

0.01

0.05

µV/°C

Output Offset, VOSO

µV

Average Temperature Drift

TA = −40°C to +125°C

0.05

0.5

µV/°C

Input Currents

Input Bias Current

250

500

TA = −40°C to +125°C

Input Offset Current

100

TA = −40°C to +125°C

0.5

Gains

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

Gain Error

G = 1

0.05

G = 2 to 128

0.8

Gain Drift

TA = −40°C to +125°C

G = 1 to 32

ppm/°C

G = 64

ppm/°C

G = 128

ppm/°C

Linearity

0.2 V to 4.8 V, 10 kΩ load

ppm

0.2 V to 4.8 V, 2 kΩ load

ppm

CMRR

G = 1

G = 2

G = 4

G = 8

G = 16

104

G = 32

110

G = 64

110

G = 128

110

Noise

en = √(eni2 + (eno/G)2), VIN+, VIN− = 2.5 V

Input Voltage Noise, eni

f = 1 kHz

nV/√Hz

f = 1 kHz, TA = −40°C

nV/√Hz

f = 1 kHz, TA = 125°C

nV/√Hz

f = 0.1 Hz to 10 Hz

0.7

µV p-p

Output Voltage Noise, eno

f = 1 kHz

nV/√Hz

f = 1 kHz, TA = −40°C

nV/√Hz

f = 1 kHz, TA = 125°C

nV/√Hz

f = 0.1 Hz to 10 Hz

1.1

µV p-p

Current Noise

f = 10 Hz

fA/√Hz

Other Input Characteristics

Common-Mode Input Impedance

10||5

GΩ||pF

Power Supply Rejection Ratio

100

115

Input Operating Voltage Range

0.05

4.95

Reference Input

Input Impedance

kΩ

Voltage Range

−0.2

+5.2

Rev. C | Page 3 of 24

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