4:2

HV

MUX

High-Voltage Level Translation

Input

High-Voltage Multiplexed Input

Analog Inputs

LED

Photo

Detector

Bridge Sensor

Thermocouple

Current Sensing

Optical Sensor

+

+

OPAx189

OPAx189

Robust MUX-Friendly Inputs

without Anti-Parallel Diodes

Copyright © 2017, Texas Instruments Incorporated

Time

C003

Classical High-Voltage Op Amp

Anti-Parallel Diodes Loads Source

OPAx189 MUX-friendly Inputs

Prevents Loading of Source

Competitor HV Amp

OPAx189

Copyright © 2017, Texas Instruments Incorporated

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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.

OPA189, OPA2189

SBOS830C – SEPTEMBER 2017 – REVISED OCTOBER 2018

OPAx189 Precision, Lowest-Noise 36-V, Zero-Drift, 14-MHz

MUX-Friendly, Rail-to-Rail Output, Operational Amplifiers

1

1 Features

1

•

Ultra-High Precision:

–

Zero-Drift: 0.005 μV/°C (OPA189)

–

Ultra-Low Offset Voltage: 3 μV Maximum

(OPA189)

•

Excellent DC Precision:

–

CMRR: 168 dB

–

Open-Loop Gain: 170 dB

•

Low Noise:

–

–

•

Excellent Dynamic Performance:

–

Gain Bandwidth: 14 MHz

–

Slew Rate: 20 V/µs

–

Fast Settling: 10-V step, 0.01% in 1.1 µs

•

Robust Design:

–

MUX-Friendly Inputs

–

RFI/EMI Filtered Inputs

•

Wide Supply Range: 4.5 V to 36 V

•

Quiescent Current: 1.7 mA (Maximum)

•

Rail-to-Rail Output

•

Input Includes Negative Rail

2 Applications

•

Precision Multi-Channel Systems

•

Bridge Amplifier

•

Strain Gauges

•

Temperature Measurement

•

Resistance Temperature Detectors

3 Description

The OPAx189 (OPA189 and OPA2189) series of

high-precision operational amplifiers are ultra-low

noise, fast-settling, zero-drift devices that provide rail-

to-rail output operation and feature a unique MUX-

friendly architecture and controlled start-up system.

These

features

and

excellent

ac

performance,

combined with only 0.4 µV of offset voltage and

0.005 µV/°C of drift over temperature for the single-

channel version, make the OPAx189 a great choice

for precision instrumentation, signal measurement,

and active filtering applications. Moreover, the MUX-

friendly input architecture prevents inrush current

when applying large input differential voltages which

improves

settling

performance

in

multi-channel

systems, all while providing robust ESD protection

during shipment, handling, and assembly. All versions

are specified from –40°C to +125°C.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

OPA189

SOIC (8)

4.90 mm × 3.90 mm

SOT-23 (5)

(preview)

2.90 mm × 1.60 mm

VSSOP (8)

3.00 mm × 3.00 mm

OPA2189 (preview)

SOIC (8) (preview)

4.90 mm × 3.90 mm

VSSOP (8)

(preview)

3.00 mm × 3.00 mm

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

at the end of the data sheet.

OPAx189 Preserves R-C Settling Performance in a

Switched or Multiplexed Application

OPAx189 MUX-Friendly Input Settles Quickly and

Maintains High Input Impedance When Switched