-3

-2

-1

0

1

2

3

2.47

2.48

2.49

2.5

2.51

2.52

2.53

±100 ±80 ±60 ±40 ±20

0

20

40

60

80

100

û5 5 SSP

C001

R

GND

25 k

25 k

+

±

OPA388

GND

5 V

100 k

REF5025

5 V

+

±

OPA388

GND

5 V

R2

10 k

GND

100 k

5 V

G = 5 +

200

NŸ

+SENSE

±SENSE

Load Cell

Product

Folder

Order

Now

Technical

Documents

Tools &

Software

Support &

Community

Reference

Design

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. UNLESS OTHERWISE NOTED, this document contains PRODUCTION

DATA.

OPA388, OPA2388, OPA4388

SBOS777C – DECEMBER 2016 – REVISED MAY 2019

OPAx388 Precision, Zero-Drift, Zero-Crossover,

True Rail-to-Rail, Input/Output Operational Amplifiers

1

1 Features

1

•

Ultra-low offset voltage: ±0.25 µV

•

Zero drift: ±0.005 µV/°C

•

Zero crossover: 140-dB CMRR true RRIO

•

Low noise: 7.0 nV

√Hz at 1 kHz

•

•

Fast settling: 2 µs (1 V to 0.01%)

•

Gain bandwidth: 10 MHz

•

Single supply: 2.5 V to 5.5 V

•

Dual supply: ±1.25 V to ±2.75 V

•

True rail-to-rail input and output

•

EMI/RFI filtered inputs

•

Industry-standard packages:

–

Single in SOIC-8, SOT-23-5, and VSSOP-8

–

Dual in SOIC-8 and VSSOP-8

–

Quad in SOIC-14 and TSSOP-14

2 Applications

•

Bridge amplifiers

•

Strain gauges

•

Test equipment

•

Current shunt measurement

•

Thermocouples, thermopiles

•

Electronic scales

•

Medical instrumentation

•

Resistor thermal detectors

•

Precision active filters

3 Description

The OPAx388 (OPA388, OPA2388, and OPA4388)

series of precision operational amplifiers are ultra-low

noise, fast-settling, zero-drift, zero-crossover devices

that provide rail-to-rail input and output operation.

These

features

and

excellent

ac

performance,

combined with only 0.25 µV of offset and 0.005 µV/°C

of drift over temperature, makes the OPAx388 a great

choice for driving high-precision, analog-to-digital

converters (ADCs) or buffering the output of high-

resolution, digital-to-analog converters (DACs). This

design results in excellent performance when driving

analog-to-digital

converters

(ADCs)

without

degradation of linearity. The OPA388 (single version)

is available in the VSSOP-8, SOT23-5, and SOIC-8

packages. The OPA2388 (dual version) is offered in

the VSSOP-8 and SO-8 packages. The OPA4388

(quad version) is offered in the TSSOP-14 and SO-14

packages.

All

versions

are

specified

over

the

industrial temperature range of –40°C to +125°C.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

OPA388

SOIC (8)

4.90 mm × 3.90 mm

SOT-23 (5)

2.90 mm × 1.60 mm

VSSOP (8)

3.00 mm × 3.00 mm

OPA2388

SOIC (8)(2)

4.90 mm × 3.90 mm

VSSOP (8)

3.00 mm × 3.00 mm

OPA4388

SOIC (14)

8.65 mm x 3.90 mm

TSSOP (14)

5.00 mm x 4.40 mm

(1) For all available packages, see the package option addendum

at the end of the data sheet.

(2) The OPA2388 SOIC (D) package is preview.

The OPA388 in a High-CMRR, Instrumentation

Amplifier Application

The OPA388 Allows Precision, Low-Error

Measurements