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. ADVANCE INFORMATION for pre-production products; subject to

change without notice.

OPA189, OPA2189, OPA4189

SBOS830 – JUNE 2017

OPAx189, Precision, 36-V, 14-MHz, MUX-Friendly

Low-Noise, Rail-to-Rail Output, Zero-Drift Operational Amplifiers

1

1 Features

1

•

Ultra-High Precision:

–

Ultra-Low Offset Voltage: 0.4 μV

–

Zero-Drift: 0.0035 μV/°C

•

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, 0.01% in 1.5 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-Chanel Systems

•

Bridge Amplifier

•

Strain Gauges

•

Temperature Measurement

•

Resistance Temperature Detectors

3 Description

The OPAx189 (OPA189, OPA2189, and OPA4189)

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. These features and

excellent ac performance, combined with only 0.4 µV

of offset and 0.0035 µV/°C of drift over temperature,

makes

the

OPAx189

well-suited

for

precision

instrumentation, signal measurement, and active

filtering applications. Moreover, the MUX-friendly

input architecture prevents inrush current when

applying large 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)

2.90 mm × 1.60 mm

VSSOP (8)

3.00 mm × 3.00 mm

OPA2189

SOIC (8)

4.90 mm × 3.90 mm

VSSOP (8)

3.00 mm × 3.00 mm

OPA4189

SOIC (14)

8.65 mm × 3.90 mm

TSSOP (14)

5.00 mm × 4.40 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