5.7 Electrical Characteristics (continued)

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

OPEN-LOOP GAIN

AOL

Open-loop voltage gain

VS = 5.5V

(V–) + 50mV < VOUT <

(V+) – 50mV

115

132

dB

(V–) + 100mV < VO <

(V+) – 100mV, RL = 2kΩ

110

128

(V–) + 100mV < VOUT <

(V+) – 100mV, RL = 2kΩ,

TA = –40°C to +125°C(1)

100

VS = 1.7V

(V–) + 50mV < VOUT <

(V+) – 50mV,

VCM = (V+) – 1.15V

106

124

(V–) + 100mV < VOUT <

(V+) – 100mV, RL = 2kΩ,

VCM = (V+) – 1.15V

106

124

(V–) + 100mV < VOUT <

(V+) – 100mV, RL = 2kΩ,

VCM = (V+) – 1.15V,

TA = –40°C to +125°C(1)

100

FREQUENCY RESPONSE

GBW

Gain-bandwidth product

AV = 1000V/V

13

MHz

SR

Slew rate

4V step, gain = +1

falling

4.5

V/μs

rising

3.5

Phase margin

CL = 100pF

OPA397

45

°

OPA2397, OPA4397

35

tS

Settling time

To 0.1%, 2V step, gain = +1

0.75

μs

To 0.01%, 2V step, gain = +1

1

Overload recovery time

VIN × gain > VS

0.45

μs

THD+N

Total harmonic distortion +

noise

VOUT = 1VRMS, gain = +1, f = 1kHz,

VCM = (V–) + 1.5V

–112

dB

0.00025

%

OUTPUT

Voltage output swing from

both rails

VS = 1.7V

20

mV

RL = 2kΩ

30

VS = 5.5V

20

RL = 2kΩ

35

ISC

Short-circuit current

Sinking, VS = 5.5V

–55

mA

Sourcing, VS = 5.5V

65

RO

Open-loop output

impedance

f = 1MHz

120

Ω

POWER SUPPLY

IQ

Quiescent current per

amplifier

IO = 0mA

1.22

1.4

mA

TA = –40°C to +125°C(1)

1.5

(1)

Specification established from device population bench system measurements across multiple lots.

OPA397, OPA2397, OPA4397

SBOSA02A – AUGUST 2021 – REVISED APRIL 2025

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