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OPA2188

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SBOS525C – AUGUST 2011 – REVISED JUNE 2016

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Copyright © 2011–2016, Texas Instruments Incorporated

(1)

1000-hour life test at +125°C demonstrated randomly distributed variation in the range of measurement limits—approximately 4 μV.

7.6 Electrical Characteristics: Low-Voltage Operation, VS = ±2 V to < ±4 V (VS = +4 V to < +8 V)

at TA = 25°C, RL = 10 kΩ connected to VS/2, and VCOM = VOUT = VS/2, unless otherwise noted.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

OFFSET VOLTAGE

VOS

Input offset voltage

6

25

μV

TA = –40°C to +105°C

0.03

0.085

μV/°C

PSRR

Power-supply rejection ratio

VS = 4 V to 36 V, VCM = VS / 2

0.075

0.3

μV/V

VS = 4 V to 36 V, VCM = VS / 2,

TA = –40°C to +105°C

0.3

μV/V

Long-term stability

4(1)

μV

Channel separation, dc

1

μV/V

INPUT BIAS CURRENT

IB

Input bias current

VCM = VS / 2

±160

±850

pA

TA = –40°C to +105°C

±18

nA

IOS

Input offset current

±320

±1700

pA

TA = –40°C to +105°C

±6

nA

NOISE

en

Input voltage noise

f = 0.1 Hz to 10 Hz

0.25

μVPP

Input voltage noise density

f = 1 kHz

8.8

nV/

√Hz

in

Input current noise density

f = 1 kHz

7

fA/

√Hz

INPUT VOLTAGE RANGE

VCM

Common-mode voltage range

TA = –40°C to +105°C

V–

(V+) – 1.5

V

CMRR

Common-mode rejection ratio

(V–) < VCM < (V+) – 1.5 V

106

114

dB

(V–) + 0.5 V < VCM < (V+) – 1.5 V,

VS = ±2 V

114

120

dB

(V–) + 0.5 V < VCM < (V+) – 1.5 V,

VS = ±2 V, TA = –40°C to +105°C

110

120

dB

INPUT IMPEDANCE

Differential

100 || 6

MΩ || pF

Common-mode

6 || 95

1012 Ω || pF

OPEN-LOOP GAIN

AOL

Open-loop voltage gain

(V–) + 500 mV < VO < (V+) – 500 mV,

RL = 5 kΩ, VS = 5 V

110

120

dB

(V–) + 500 mV < VO < (V+) – 500 mV,

RL = 10 kΩ

120

130

dB

(V–) + 500 mV < VO < (V+) – 500 mV,

RL = 10 kΩ, TA = –40°C to +105°C

114

120

dB

FREQUENCY RESPONSE

GBW

Gain-bandwidth product

2

MHz

SR

Slew rate

G = +1

0.8

V/μs

Overload recovery time

VIN × G = VS

1

μs

THD+N

Total harmonic distortion + noise

1 kHz, G = 1, VOUT = 1 VRMS

0.0001

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