AD8231_07 datasheet(2/8 Pages) AD

Nome de Peças	AD8231

Descrição Electrónicos	Zero Drift, Digital Programmable Instrumentation Amplifier

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Fabricante Electrônico	AD [Analog Devices]

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AD8231

Preliminary Data Sheet

Rev. PrC | Page 2 of 8

SPECIFICATIONS

Table 1. VS = 5 V, VREF = 2.5 V, G=1, RL = 10 kΩ, -40°C ≤TA ≤ +125°C unless otherwise noted).

Parameter

Conditions

Min

Typ

Max

Unit

INSTRUMENTATION AMPLIFIER

OFFSET VOLTAGE

VOS RTI = VOSI + VOSO/G

Input Offset, VOSI

5

25

μV

Average Temperature Drift

0.01

0.05

μV/°C

Output Offset, VOSO

15

50

μV

Average Temperature Drift

0.02

0.1

μV/°C

INPUT CURRENTS

Input Bias Current

TA = 25°C

200

400

pA

1

nA

Input Offset Current

TA = 25°C

50

100

pA

0.5

nA

GAINS

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

Gain Error

G = 1

0.1

0.3

%

G = 2 to 128

1

TBD

%

Gain Drift

G = 1

2

10

ppm/°C

G = 2 to 128

2

10

ppm/°C

Gain Nonlinearity

VOUT = 0.1 to 4.9V

G= 1

5

ppm

G= 8

TBD

ppm

G= 128

TBD

ppm

CMRR

G=1

80

100

dB

G=2

86

106

dB

G=4

92

112

dB

G=8

98

118

dB

G=16

104

124

dB

G=32

110

130

dB

G=64

116

136

dB

G=128

122

142

dB

NOISE

Noise RTI = sqrt(eni2 + (eno/G)2

VIN+, VIN− =2.5V ; TA = 25°C

Input Voltage Noise, eni

f = 1 kHz,

32

nV/√Hz

f = 0.1 Hz to 10 Hz

0.7

μV p-p

f = 0.01 Hz to 1 Hz

0.2

μV p-p

Output Voltage Noise, eno

f = 1 kHz

60

nV/√Hz

f = 0.1 Hz to 10 Hz

1

μV p-p

f = 0.01 Hz to 1 Hz

0.5

μV p-p

OTHER INPUT CHARACTERISTICS

Differential Input Impedance

Common Mode

10||5

GΩ||pF

Common Mode Input Impedance

Differential

10||5

GΩ||pF

Power Supply Rejection Ratio

100

110

dB

Input Operating Voltage Range

0.05

4.95

V

REFERENCE INPUT

Input Impedance

10||10

GΩ||pF

Voltage Range

0.05

4.95

V

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