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Precision op amps (Vos<1mV)

OPA2189

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Dual, 14-MHz, MUX-friendly, low-noise, zero-drift, RRO, CMOS precision operational amplifier

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TLV2888 ACTIVE Dual, 36V, 14MHz, zero-drift, mux-friendly CMOS precision operational amplifier Cost-optimized replacement with higher offset voltage (15μV, maximum) and voltage noise (7.5 nV/√Hz at 1kHz)

OPA2189

ACTIVE
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Product details

Number of channels 2 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 36 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 4.5 Vos (offset voltage at 25°C) (max) (mV) 0.005 Offset drift (typ) (µV/°C) 0.006 Input bias current (max) (pA) 300 GBW (typ) (MHz) 14 Features EMI Hardened, High Cload Drive, Zero Drift Slew rate (typ) (V/µs) 20 Rail-to-rail In to V-, Out Iq per channel (typ) (mA) 1.3 Vn at 1 kHz (typ) (nV√Hz) 5.2 CMRR (typ) (dB) 168 Rating Catalog Operating temperature range (°C) -40 to 125 Iout (typ) (A) 0.065 Architecture CMOS Input common mode headroom (to negative supply) (typ) (V) -0.1 Input common mode headroom (to positive supply) (typ) (V) -2.5 Output swing headroom (to negative supply) (typ) (V) 0.02 Output swing headroom (to positive supply) (typ) (V) -0.02 THD + N at 1 kHz (typ) (%) 0.00006
Number of channels 2 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 36 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 4.5 Vos (offset voltage at 25°C) (max) (mV) 0.005 Offset drift (typ) (µV/°C) 0.006 Input bias current (max) (pA) 300 GBW (typ) (MHz) 14 Features EMI Hardened, High Cload Drive, Zero Drift Slew rate (typ) (V/µs) 20 Rail-to-rail In to V-, Out Iq per channel (typ) (mA) 1.3 Vn at 1 kHz (typ) (nV√Hz) 5.2 CMRR (typ) (dB) 168 Rating Catalog Operating temperature range (°C) -40 to 125 Iout (typ) (A) 0.065 Architecture CMOS Input common mode headroom (to negative supply) (typ) (V) -0.1 Input common mode headroom (to positive supply) (typ) (V) -2.5 Output swing headroom (to negative supply) (typ) (V) 0.02 Output swing headroom (to positive supply) (typ) (V) -0.02 THD + N at 1 kHz (typ) (%) 0.00006
VSSOP (DGK) 8 14.7 mm² (3 mm × 4.9 mm) SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm)
  • 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:
    • 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
  • Input includes negative rail
  • 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:
    • 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
  • Input includes negative rail

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.

All versions are specified from –40°C to +125°C.

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.

All versions are specified from –40°C to +125°C.
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Technical documentation

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* Data sheet OPAx189 Precision, Lowest-Noise, 36-V, Zero-Drift, 14-MHz, MUX-Friendly, Rail-to-Rail Output Operational Amplifiers datasheet (Rev. I) PDF | HTML Oct 6, 2021
Application brief Offset Correction Methods: Laser Trim, e-Trim, and Chopper (Rev. D) PDF | HTML Dec 5, 2024
Application brief How to Select Amplifiers for Pressure Transmitter Applications (Rev. B) PDF | HTML Feb 14, 2023
Application brief MUX-Friendly, Precision Operational Amplifiers (Rev. C) PDF | HTML Feb 8, 2022
Technical article How to achieve microvoltage-level precision in thermopile applications PDF | HTML Dec 9, 2021
Application brief Zero-Drift Amplifiers: Features and Benefits (Rev. C) Jan 28, 2021
Application brief Minimize Errors in Weigh-Scales With Zero-Drift, EMI-Hardened, Precision Amps (Rev. A) PDF | HTML Dec 8, 2020
Application note AN-31 Amplifier Circuit Collection (Rev. D) PDF | HTML Oct 21, 2020
Application brief EMI-Hardened Op Amps Reduce Errors in EKGs (Rev. A) Aug 21, 2019
Application brief Green-Williams-Lis: Improved Op Amp Spice Model Jan 28, 2019
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Application brief How to Properly Configure Unused Operational Amplifiers (Rev. A) Sep 21, 2018

Design & development

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Evaluation board

AMP-PDK-EVM — Amplifier performance development kit evaluation module

The amplifier performance development kit (PDK) is an evaluation module (EVM) kit to test common operational amplifier (op amp) parameters and is compatible with most op amps and comparators. The EVM kit offers a main board with several socketed daughtercard options to fit package needs, allowing (...)

User guide: PDF | HTML
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Simulation model

OPAx189 PSpice Model (Rev. E)

SBOMAE9E.ZIP (30 KB) - PSpice model
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Simulation model

OPAx189 TINA-TI Reference Design (Rev. D)

SBOMAF0D (342 KB) - TINA-TI reference design
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Simulation model

OPAx189 TINA-TI Spice Model (Rev. E)

SBOMAF1E.ZIP (11 KB) - TINA-TI Spice model
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Calculation tool

ANALOG-ENGINEER-CALC — PC software analog engineer's calculator

The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)

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Calculation tool

OPAMP-NOISECALC — Noise Calculator

This folder contains three tools to help in understandning and managing noise in cicuits. The included tools are:

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Design tool

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Reference design

TIDA-00777 — Active Integrator for Rogowski Coil Reference Design with Improved Accuracy for Relay and Breaker

This reference design shows an active integrator design that covers wide-input current range for Rogowski Coil with accuracy, linearity, stability and repeatability. The integrator uses a precision amplifier with very-low offset and temperature drift. Two configurations of the integrator are (...)
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Package Pins CAD symbols, footprints & 3D models
VSSOP (DGK) 8 Ultra Librarian
SOIC (D) 8 Ultra Librarian
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