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INA186

ACTIVE

40-V, bidirectional, high-precision current sense amplifier with picoamp input bias & ENABLE

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Data sheet

INA186

ACTIVE
Data sheet Order now

Product details

Product type Analog output Common-mode voltage (max) (V) 40 Common-mode voltage (min) (V) -0.2 Input offset (±) (max) (µV) 50 Input offset drift (±) (typ) (µV/°C) 0.05 Features Bidirectional, High precision, Low-side Capable Rating Catalog Voltage gain (V/V) 25, 50, 100, 200, 500 CMRR (min) (dB) 120 Bandwidth (kHz) 27, 33, 35, 37, 45 Iq (max) (mA) 0.09 Number of channels 1 Comparators (#) 0 Gain error (%) 1 Gain error drift (±) (max) (ppm/°C) 10 Slew rate (V/µs) 0.3 Operating temperature range (°C) -40 to 125
Product type Analog output Common-mode voltage (max) (V) 40 Common-mode voltage (min) (V) -0.2 Input offset (±) (max) (µV) 50 Input offset drift (±) (typ) (µV/°C) 0.05 Features Bidirectional, High precision, Low-side Capable Rating Catalog Voltage gain (V/V) 25, 50, 100, 200, 500 CMRR (min) (dB) 120 Bandwidth (kHz) 27, 33, 35, 37, 45 Iq (max) (mA) 0.09 Number of channels 1 Comparators (#) 0 Gain error (%) 1 Gain error drift (±) (max) (ppm/°C) 10 Slew rate (V/µs) 0.3 Operating temperature range (°C) -40 to 125
SOT-SC70 (DCK) 6 4.2 mm² (2 mm × 2.1 mm) DSBGA (YFD) 6 1.4000000000000001 mm² (— mm × — mm) SOT-23-THN (DDF) 8 8.12 mm² (2.9 mm × 2.8 mm)
  • Wide common-mode voltage range, VCM: –0.2 V to +40 V
  • Low input bias currents, IIB: 500 pA (typical) (enables microamp current measurement)
  • Low power:
    • Low supply voltage, VS: 1.7 V to 5.5 V
    • Low quiescent current, IQ: 48 µA (typical)
  • Accuracy:
    • Common-mode rejection ratio: 120 dB (minimum)
    • Gain error, EG: ±1% (maximum)
    • Gain drift: 10 ppm/°C (maximum)
    • Offset voltage, VOS: ±50 µV (maximum)
    • Offset drift: 0.5 µV/°C (maximum)
  • Bidirectional current sensing capability
  • Gain options:
    • INA186A1: 25 V/V
    • INA186A2: 50 V/V
    • INA186A3: 100 V/V
    • INA186A4: 200 V/V
    • INA186A5: 500 V/V
  • Wide common-mode voltage range, VCM: –0.2 V to +40 V
  • Low input bias currents, IIB: 500 pA (typical) (enables microamp current measurement)
  • Low power:
    • Low supply voltage, VS: 1.7 V to 5.5 V
    • Low quiescent current, IQ: 48 µA (typical)
  • Accuracy:
    • Common-mode rejection ratio: 120 dB (minimum)
    • Gain error, EG: ±1% (maximum)
    • Gain drift: 10 ppm/°C (maximum)
    • Offset voltage, VOS: ±50 µV (maximum)
    • Offset drift: 0.5 µV/°C (maximum)
  • Bidirectional current sensing capability
  • Gain options:
    • INA186A1: 25 V/V
    • INA186A2: 50 V/V
    • INA186A3: 100 V/V
    • INA186A4: 200 V/V
    • INA186A5: 500 V/V

The INA186 is a low-power, voltage-output, current-sense amplifier (also called a current-shunt monitor). This device is commonly used for overcurrent protection, precision current measurement for system optimization, or in closed-loop feedback circuits. The INA186 can sense drops across shunts at common-mode voltages from –0.2 V to +40 V, independent of the supply voltage.

The low input bias current of the INA186 permits the use of larger current-sense resistors, thus providing accurate current measurements in the microamp range. The low offset voltage of the zero-drift architecture extends the dynamic range of the current measurement. This feature allows for smaller sense resistors with lower power loss, while still providing accurate current measurements.

The INA186 operates from a single 1.7-V to 5.5-V power supply, and draws a maximum of 90 µA of supply current . Five fixed gain options are available: 25 V/V, 50 V/V, 100 V/V, 200 V/V, or 500 V/V. The device is specified over the operating temperature range of –40°C to +125°C, and offered in SC70, SOT-23-THIN, and DSBGA packages. The SC70 and SOT-23 (DDF) packages support bidirectional current measurement, whereas the DSBGA package only supports current measurement in one direction.

The INA186 is a low-power, voltage-output, current-sense amplifier (also called a current-shunt monitor). This device is commonly used for overcurrent protection, precision current measurement for system optimization, or in closed-loop feedback circuits. The INA186 can sense drops across shunts at common-mode voltages from –0.2 V to +40 V, independent of the supply voltage.

The low input bias current of the INA186 permits the use of larger current-sense resistors, thus providing accurate current measurements in the microamp range. The low offset voltage of the zero-drift architecture extends the dynamic range of the current measurement. This feature allows for smaller sense resistors with lower power loss, while still providing accurate current measurements.

The INA186 operates from a single 1.7-V to 5.5-V power supply, and draws a maximum of 90 µA of supply current . Five fixed gain options are available: 25 V/V, 50 V/V, 100 V/V, 200 V/V, or 500 V/V. The device is specified over the operating temperature range of –40°C to +125°C, and offered in SC70, SOT-23-THIN, and DSBGA packages. The SC70 and SOT-23 (DDF) packages support bidirectional current measurement, whereas the DSBGA package only supports current measurement in one direction.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet INA186 Bidirectional, Low-Power, Zero-Drift, Wide Dynamic Range, Current-Sense Amplifier With Enable datasheet (Rev. B) PDF | HTML Jul 30, 2021
Application note Using a PCB Copper Trace as a Current Sense Shunt Resistor (Rev. A) PDF | HTML Apr 27, 2026
Application note Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers PDF | HTML Nov 18, 2024
Circuit design Low (microamp), high-side, current-sensing circuit with current-sensing amp (Rev. A) PDF | HTML Sep 25, 2024
Application brief Improving Power Amplifier Efficiency With Current Monitors (Rev. B) PDF | HTML Jul 24, 2023
Application brief Precision Current Measurements on High-Voltage Power-Supply Rails (Rev. F) PDF | HTML Oct 17, 2022
Circuit design Low-Drift, Low-Side, Bidirectional Current Sensing Circuit (Rev. A) PDF | HTML Dec 2, 2020
Application brief Difference Between an Instrumentation Amplifier and a Current Sense Amplifier Apr 3, 2020
Application brief External current sense amps vs integrated onboard amplifiers for current sensing (Rev. B) Feb 19, 2019

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

INA186EVM — INA186 evaluation module

This is a small module with 5 completely independent boards that can be broken off by the user. Five identical boards (15A rating) can be used for the five device gain variants. Each board provides test points for VS, GND, OUT, and REF. Additionally, boards are compatible with 1206 to 0603 shunt (...)
User guide: PDF
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Simulation model

INA186 TINA-TI Reference Design (Rev. A)

SBOMAX9A.TSC (192 KB) - TINA-TI reference design
Supported products & hardware
Simulation model

INA186 TINA-TI Spice Model (Rev. A)

SBOMAY0A.ZIP (58 KB) - TINA-TI Spice model
Supported products & hardware
Simulation model

INA186A1 PSpice Model

SBOMBE8.ZIP (29 KB) - PSpice model
Supported products & hardware
Simulation model

INA186A2 PSpice Model

SBOMBA6.ZIP (30 KB) - PSpice model
Supported products & hardware
Simulation model

INA186A3 PSpice Model

SBOMBA7.ZIP (30 KB) - PSpice model
Supported products & hardware
Simulation model

INA186A4 PSpice Model

SBOMBA9.ZIP (30 KB) - PSpice model
Supported products & hardware
Simulation model

INA186A5 PSpice Model

SBOMBD1.ZIP (30 KB) - PSpice model
Supported products & hardware
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 (...)

Supported products & hardware
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 (...)

Supported products & hardware
Calculation tool

CS-AMPLIFIER-ERROR-TOOL — Current Sense Amplifier Comparison and Error Tool

This Excel calculator provides a comparison between two and five of our standard current sense amplifiers, delivering a chart containing the basic parameters of each device. This calculator also takes system condition inputs from users such as common-mode voltage, supply voltage, shunt resistor (...)
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Reference design

TIDA-00302 — Current Shunt Monitor with Transient Robustness Reference Design

This high-side current shunt monitor is used to measure the voltage developed across a current-sensing resistor when current passes through it.

Additionally, an external protection circuit is implemented to provide surge and fast-transient protection and demonstrate the different immunity levels to (...)

Supported products & hardware
Package Pins CAD symbols, footprints & 3D models
SOT-SC70 (DCK) 6 Ultra Librarian
DSBGA (YFD) 6 Ultra Librarian
SOT-23-THN (DDF) 8 Ultra Librarian
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