6.5 Electrical Characteristics

at TA = 25°C, VS = ±15 V, RL = 10 kΩ, VREF = 0 V, VCM = VS / 2, and G = 1 (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

INPUT

VOS

Offset voltage (RTI)

INA2128U

±10 ±100 / G

±50 ±500 / G

µV

INA2128UA

±25 ±100 / G ±125 ±1000 / G

Offset voltage drift (RTI)

TA = –40°C to +85°C

INA2128U

±0.2 ±2 / G

±0.5 ±20 / G

µV/°C

INA2128UA

±0.2 ±5 / G

±1 ±20 / G

PSRR

Power-supply rejection

ratio (RTI)

VS = ±2.25 V to ±18 V

INA2128U

±0.2 ±20 / G

±1 ±100 / G

µV/V

INA2128UA

±0.2 ±20 / G

±2 ±200 / G

Long-term stability

±0.2 ±3 / G

µV/mo

Input impedance

Differential

10 || 2

GΩ || pF

Common-mode

100 || 9

VCM

Common-mode

voltage(1)

VO = 0 V

(V–) + 2

(V+) – 2

V

Safe input voltage

RS = 0 Ω

±40

V

CMRR

Common-mode rejection

ratio

ΔRS = 1 kΩ, VCM = ±13 V

G = 1

INA2128U

80

86

dB

INA2128UA

73

86

G = 10

INA2128U

100

106

INA2128UA

93

106

G = 100

INA2128U

120

125

INA2128UA

110

125

G = 1000

INA2128U

120

130

INA2128UA

110

130

INPUT BIAS CURRENT

IB

Input bias current

INA2128U

±2

±5

nA

INA2128UA

±2

±10

Input bias current drift

TA = –40°C to +85°C

±30

pA/

℃

IOS

Input offset current

INA2128U

±1

±5

nA

INA2128UA

±1

±10

Input offset current drift

TA = –40°C to +85°C

±30

pA/

℃

NOISE

eN

Voltage noise (RTI)

G = 1000, RS = 0 Ω

f = 10 Hz

10

nV/√Hz

f = 100 Hz

8

f = 1 kHz

8

fB = 0.1 Hz to 10 Hz

0.2

µVPP

Current noise

f = 10 Hz

0.9

pA/√Hz

f = 1 kHz

0.3

fB = 0.1 Hz to 10 Hz

30

pAPP

INA2128

SBOS035B – DECEMBER 1995 – REVISED MAY 2023

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