5.7 Electrical Characteristics

at TA = 25°C, VS = 1.7V to 5.5V (single-supply) or VS = ±0.85V to ±2.75V (dual-supply), RL = 10kΩ connected to VS / 2, VCM

= VS / 2, and VOUT = VS / 2 (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

OFFSET VOLTAGE

VOS

Input offset voltage

VS = 5.0V

±10

±60

μV

VCM = (V+) – 200mV

±20

±100

TA = –40°C to +125°C(1)

±200

VCM = V–,

TA = –40°C to +125°C(1)

±125

OPA2397DGK

±180

dVOS/dT

Input offset voltage drift

VS = 5.0V

TA = 0°C to 85°C

±0.16

μV/°C

TA = –40°C to +125°C(1)

±1

VCM = 5.0V,

TA = –40°C to +125°C(1)

±0.18

±1.5

PSRR

Power supply rejection

ratio

VCM = V–

±30

μV/V

TA = –40°C to +125°C(1)

±80

INPUT BIAS CURRENT

IB

Input bias current(1)

±0.01

±1

pA

TA = –40°C to +85°C

±10

TA = –40°C to +125°C

±50

IOS

Input offset current(1)

±0.01

±0.8

pA

TA = –40°C to +85°C

±5

TA = –40°C to +125°C

±30

NOISE

Input voltage noise

f = 0.1Hz to 10Hz

2.0

μVPP

VCM = (V+) – 0.3V

3.2

eN

Input voltage noise density

f = 10Hz

42

nV/√Hz

VCM = (V+) – 0.3V

80

f = 1kHz

6.5

VCM = (V+) – 0.3V

10.4

f = 10kHz

4.4

VCM = (V+) – 0.3V

5.8

iN

Input current noise density f = 1kHz

OPA397

70

fA/√Hz

OPA2397, OPA4397

25

INPUT VOLTAGE

VCM

Common-mode voltage

range

V–

V+

V

CMRR

Common-mode rejection

ratio

(V–) < VCM < (V+) – 1.5V

75

120

dB

TA = –40°C to +125°C

113

(V–) < VCM < (V+),

TA = –40°C to +125°C(1)

66

97

VS = 5.5V

88

111

INPUT CAPACITANCE

ZID

Differential

1013 || 2.8

Ω || pF

ZICM

Common-mode

1013 || 3.5

Ω || pF

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OPA397, OPA2397, OPA4397

SBOSA02A – AUGUST 2021 – REVISED APRIL 2025

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