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Precision op amps (Vos<1mV)

OPA2387

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Ultra-high precision, zero-drift, low-input-bias-current op amp

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Data sheet

OPA2387

ACTIVE
Data sheet Order now

Product details

Number of channels (#) 2 Total supply voltage (Max) (+5V=5, +/-5V=10) 5.5 Total supply voltage (Min) (+5V=5, +/-5V=10) 1.7 Vos (offset voltage @ 25 C) (Max) (mV) 0.002 GBW (Typ) (MHz) 5.7 Features Zero Drift Slew rate (Typ) (V/us) 2.8 Rail-to-rail In, Out Offset drift (Typ) (uV/C) 0.003 Iq per channel (Typ) (mA) 0.57 Vn at 1 kHz (Typ) (nV/rtHz) 8.5 CMRR (Typ) (dB) 150 Rating Catalog Operating temperature range (C) -40 to 125 Input bias current (Max) (pA) 150 Output current (Typ) (mA) 55 Architecture CMOS THD + N @ 1 kHz (Typ) (%) 0.002
Number of channels (#) 2 Total supply voltage (Max) (+5V=5, +/-5V=10) 5.5 Total supply voltage (Min) (+5V=5, +/-5V=10) 1.7 Vos (offset voltage @ 25 C) (Max) (mV) 0.002 GBW (Typ) (MHz) 5.7 Features Zero Drift Slew rate (Typ) (V/us) 2.8 Rail-to-rail In, Out Offset drift (Typ) (uV/C) 0.003 Iq per channel (Typ) (mA) 0.57 Vn at 1 kHz (Typ) (nV/rtHz) 8.5 CMRR (Typ) (dB) 150 Rating Catalog Operating temperature range (C) -40 to 125 Input bias current (Max) (pA) 150 Output current (Typ) (mA) 55 Architecture CMOS THD + N @ 1 kHz (Typ) (%) 0.002
VSSOP (DGK) 8 15 mm² 3 x 4.9 WSON (DSG) 8 4 mm² 2 x 2
  • Ultra-low offset voltage: ±2 µV (maximum, tested)
  • Zero drift: ±0.003 µV/°C
  • Low-input bias current: 150 pA (maximum, tested)
  • Low noise: 8.5 nV√Hz at 1 kHz
  • No 1/f noise: 177 nVPP (0.1 Hz to 10 Hz)
  • Common-mode input range ±100 mV beyond supply rails
  • Gain bandwidth: 5.7 MHz
  • Quiescent current: 570 µA per amplifier
  • Single supply: 1.7 V to 5.5 V
  • Dual supply: ±0.85 V to ±2.75 V
  • EMI and RFI filtered inputs
  • Ultra-low offset voltage: ±2 µV (maximum, tested)
  • Zero drift: ±0.003 µV/°C
  • Low-input bias current: 150 pA (maximum, tested)
  • Low noise: 8.5 nV√Hz at 1 kHz
  • No 1/f noise: 177 nVPP (0.1 Hz to 10 Hz)
  • Common-mode input range ±100 mV beyond supply rails
  • Gain bandwidth: 5.7 MHz
  • Quiescent current: 570 µA per amplifier
  • Single supply: 1.7 V to 5.5 V
  • Dual supply: ±0.85 V to ±2.75 V
  • EMI and RFI filtered inputs

The OPA387, OPA2387, and OPA4387 ( OPAx387) family of precision amplifiers offers state-of-the-art performance. With zero-drift technology, the OPAx387 offset voltage and offset drift provide unparalleled long-term stability. With a mere 570 µA of quiescent current, the OPAx387 are able to achieve 5.7 MHz of bandwidth, a broadband noise of 8.5 nV/√Hz, and a 1/f noise at 177 nVPP. These specifications are crucial to achieve extremely-high precision and no degradation of linearity in 16-bit to 24-bit analog to digital converters (ADCs). The OPAx387 feature flat bias current over temperature; therefore, little to no calibration is needed in high input impedance applications over temperature.

All versions are specified over the industrial temperature range of –40°C to +125°C.

The OPA387, OPA2387, and OPA4387 ( OPAx387) family of precision amplifiers offers state-of-the-art performance. With zero-drift technology, the OPAx387 offset voltage and offset drift provide unparalleled long-term stability. With a mere 570 µA of quiescent current, the OPAx387 are able to achieve 5.7 MHz of bandwidth, a broadband noise of 8.5 nV/√Hz, and a 1/f noise at 177 nVPP. These specifications are crucial to achieve extremely-high precision and no degradation of linearity in 16-bit to 24-bit analog to digital converters (ADCs). The OPAx387 feature flat bias current over temperature; therefore, little to no calibration is needed in high input impedance applications over temperature.

All versions are specified over the industrial temperature range of –40°C to +125°C.
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Technical documentation

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Type Title Date
* Data sheet OPAx387 Ultra-High Precision, Zero-Drift, Low-Input-Bias-Current Op Amps datasheet (Rev. F) PDF | HTML 15 Feb 2022
Technical article How to achieve microvoltage-level precision in thermopile applications 09 Dec 2021
Application note Zero-Drift Amplifiers: Features and Benefits (Rev. C) 28 Jan 2021
Application note Minimize Errors in Weigh-Scales With Zero-Drift, EMI-Hardened, Precision Amps (Rev. A) PDF | HTML 08 Dec 2020

Design & development

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Evaluation board

DIP-ADAPTER-EVM — DIP adapter evaluation module

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Simulation model

OPAx387 PSpice Model (Rev. B)

SBOMBI9B.ZIP (31 KB) - PSpice Model
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Simulation model

OPAx387 TINA-TI Reference Design (Rev. A)

SBOMBJ0A.TSC (342 KB) - TINA-TI Reference Design
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OPAx387 TINA-TI Spice Model (Rev. A)

SBOMBJ1A.ZIP (11 KB) - TINA-TI Spice Model
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Calculation tool

ANALOG-ENGINEER-CALC — 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, Generator and Examples

This folder contains three tools to help in understandning and managing noise in cicuits. The included tools are:
  • A noise generator tool - This is a Lab View 4-Run Time executable that generates Gaussian white noise, uniform white noise, 1/f noise, short noise, and 60Hz line noise. Temporal data, (...)
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Simulation tool

TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
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