OPA189, OPA2189, OPA4189
SBOS830I – SEPTEMBER 2017 – REVISED OCTOBER 2021
OPAx189 Precision, Lowest-Noise, 36-V, Zero-Drift, 14-MHz,
MUX-Friendly, Rail-to-Rail Output Operational Amplifiers
1 Features
3 Description
•
Ultra-high precision:
The OPA189, OPA2189, and OPA4189 (OPAx189)
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
0.005µV/°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 multichannel
systems, all while providing robust ESD protection
during shipment, handling, and assembly.
– 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:
– en at 1 kHz: 5.2 nV/√Hz
– 0.1-Hz to 10-Hz noise: 0.1 µVPP
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
•
All versions are specified from –40°C to +125°C.
•
•
•
•
Device Information
PART NUMBER
PACKAGE(1)
BODY SIZE (NOM)
4.90 mm × 3.90 mm
2.90 mm × 1.60 mm
3.00 mm × 3.00 mm
4.90 mm × 3.90 mm
3.00 mm × 3.00 mm
5.00 mm × 4.40 mm
8.65 mm × 3.91 mm
SOIC (8)
Input includes negative rail
OPA189
SOT-23 (5)
VSSOP (8)
SOIC (8)
2 Applications
•
•
•
•
•
Battery test
Analog input module
Weigh scale
DC power supply, ac source, electronic load
Multifunction relay
OPA2189
OPA4189
VSSOP (8)
TSSOP (14)
SOIC (14)
(1) For all available packages, see the package option
addendum at the end of the data sheet.
Analog Inputs
OPAx189 MUX-friendly Inputs
Prevents Loading of Source
OPAx189
Bridge Sensor
OPAx189
+
4:2
HV
MUX
Robust MUX-Friendly Inputs
without Anti-Parallel Diodes
Thermocouple
+
OPAx189
Current Sensing
Competitor HV Amp
Photo
Detector
Classical High-Voltage Op Amp
Anti-Parallel Diodes Loads Source
High-Voltage Level Translation
Input
LED
High-Voltage Multiplexed Input
Optical Sensor
Copyright © 2017, Texas Instruments Incorporated
Time
Copyright © 2017, Texas Instruments IncorporatedC003
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
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.
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