OPAx182 36-V, 5-MHz, Low-Noise, Zero-Drift, MUX-Friendly, Precision Op Amps

1 Features

• Ultra-high precision:

– Zero-drift: 0.003 μV/°C

– Ultra-low offset voltage: 4 μV (maximum)

• Excellent dc precision:

– CMRR: 168 dB

– Open-loop gain: 170 dB

• Low noise:

• Excellent dynamic performance:

– Gain bandwidth: 5 MHz

– Slew rate: 10 V/µs

– Fast settling: 10-V step, 0.01% in 1.7 µs

• Robust design:

– MUX-friendly inputs

– RFI/EMI filtered inputs

• Wide supply: : ±2.25 V to ±18 V, 4.5 V to 36 V

• Quiescent current: 0.85 mA

• Rail-to-rail output

• Input includes negative rail

2 Applications

• Battery test

• DC power supply, ac source, electronic load

• Data acquisition (DAQ)

• Semiconductor test

• Weigh scale

• Analog input module

• Flow transmitter

3 Description

The OPA182, OPA2182, and OPA4182 (OPAx182)

are high-precision operational amplifiers in an

ultra-low noise, fast-settling, zero-drift device that

provides rail-to-rail output operation and features

a unique MUX-friendly architecture and controlled

start-up system. These features and excellent ac

performance, combined with only 0.45 µV of offset

voltage and 0.003 µV/°C of drift over temperature,

make the OPAx182 a great choice for data

acquisition, battery test, analog input modules, weigh

scales, and any other systems requiring high dc

precision and low noise.

The MUX-friendly input architecture prevents inrush

current when applying large input differential voltages

that improves settling performance in multichannel

systems. Moreover, the controlled start-up system

rejects any inrush current upon ramping up the supply

rails, all while providing robust ESD protection during

shipment, handling, and assembly.

The device is specified from –40°C to +125°C.

Device Information

PART NUMBER

PACKAGE(1)

BODY SIZE (NOM)

OPA182

SOIC (8)

4.90 mm x 3.90 mm

SOT-23 (5) - Preview

2.90 mm x 1.60 mm

OPA2182

SOIC (8)

4.90 mm x 3.90 mm

VSSOP (8)

3.00 mm x 3.00 mm

OPA4182

TSSOP (14) - Preview 5.00 mm x 4.40 mm

SOIC (14)

8.65 mm x 3.91 mm

(1)

For all available packages, see the package option

addendum at the end of the data sheet.

±

+

18 V

±18 V

±

+

18 V

±18 V

Strain Gauge

10 k

10 k

3.4 M

5 V

OPA2182

OPA2182

OPA2182 Bridge Sensor Application

Input Offset Voltage Drift (PV/qC)

-0.02

-0.0125

-0.005

0.0025

0.01

0.0175

0

4

8

12

16

20

24

28

32

36

OPAx182 Offset Drift

OPA182, OPA2182, OPA4182

SBOS936D – DECEMBER 2019 – REVISED DECEMBER 2021

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. PRODUCTION DATA.