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Product details

Parameters

Common mode voltage (Max) (V) 40 Common mode voltage (Min) (V) -0.2 Input offset (+/-) (Max) (uV) 50 Input offset drift (+/-) (Typ) (uV/C) 0.05 Gain (V/V) 100, 200, 25, 50, 500 Gain error (%) 0.9 Gain error drift (+/-) (Max) (ppm/°C) 10 CMRR (Min) (dB) 120 Bandwidth (kHz) 45, 37, 35, 32, 27 Supply voltage (Max) (V) 5.5 Supply voltage (Min) (V) 1.7 Iq (Max) (mA) 0.09 Number of channels (#) 1 Comparators (#) 0 Features Bi-directional, Low-side Capable Rating Automotive TI functional safety category Functional Safety-Capable Operating temperature range (C) -40 to 125 open-in-new Find other Current sense amplifiers analog output

Package | Pins | Size

SOT-23 (DBV) 5 5 mm² 2.9 x 1.6 SOT-SC70 (DCK) 6 4 mm² 2 x 2.1 open-in-new Find other Current sense amplifiers analog output

Features

  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • Wide common-mode voltage range, VCM:
    –0.2 V to +40 V with survivability up to 42 V (recommended for automotive 12-V battery applications)
  • Low input bias currents, IIB: 500 pA (typical)
  • 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-Q1: 25 V/V
    • INA186A2-Q1: 50 V/V
    • INA186A3-Q1: 100 V/V
    • INA186A4-Q1: 200 V/V
    • INA186A5-Q1: 500 V/V

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Description

The INA186-Q1 is an automotive, low-power, voltage-output, current-sense amplifier (also called a current-shunt monitor). This device is commonly used for monitoring systems directly connected to an automotive 12-V battery. The INA186-Q1 can sense drops across shunts at common-mode voltages from –0.2 V to +40 V, independent of the supply voltage. In addition, the input pins have an absolute maximum voltage of 42V.

The low input bias current of the INA186-Q1 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-Q1 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, and SOT-23 packages. The SC70 package supports bidirectional current measurement, whereas the SOT-23 (DBV) only supports current measurement in one direction.

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Technical documentation

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Type Title Date
* Datasheet INA186-Q1 Automotive, 40-V Current Sense Amplifier for Cost-Sensitive Systems datasheet (Rev. A) May 01, 2020
Application notes INA186-Q1 Functional Safety FIT Rate, Failure Mode Distribution and Pin FMA Mar. 23, 2020
Technical articles Dark-current measurement in automotive telematics applications Mar. 04, 2020
Application notes Evaluating Current Sensing Amplifiers in Body Control Modules Using Simulation Dec. 16, 2019
Application notes 12-V Battery Monitoring in an Automotive Module Mar. 06, 2019
Application notes External current sense amps vs integrated onboard amplifiers for current sensing (Rev. B) Feb. 19, 2019
Application notes Precision current measurements on high-voltage power-supply rails (Rev. C) Feb. 19, 2019
Application notes Low (microamp), high-side, current-sensing circuit with current-sensing amp Jan. 08, 2019
Technical articles A key to accurate system thermal management: monitoring both current flow and temperature Oct. 04, 2018
Application notes Power-Saving Topologies for TI Current Shunt Monitors (Rev. A) Aug. 01, 2018
Application notes Low-drift, low-side, bidirectional current sensing circuit with integrated preci Jun. 28, 2018
Technical articles System trade-offs for high- and low-side current measurements Jun. 01, 2017
Technical articles Why should you care about overcurrent protection in your system? Jun. 16, 2016

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
25
Description
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 (...)
Features
  • Easy to test INA186 with differential voltage or shunt resistor.
  • Pads and sockets allow quick and easy implementation of SMD or TH filtering and input protection.
  • Breakable panels allow experimenting and testing with all gain variants.

Design tools & simulation

SIMULATION MODELS Download
SBOMAX9A.TSC (192 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SBOMAY0A.ZIP (58 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SBOMBA6.ZIP (30 KB) - PSpice Model
SIMULATION MODELS Download
SBOMBA7.ZIP (30 KB) - PSpice Model
SIMULATION MODELS Download
SBOMBA9.ZIP (30 KB) - PSpice Model
SIMULATION MODELS Download
SBOMBD1.ZIP (30 KB) - PSpice Model
SIMULATION MODELS Download
SBOMBE8.ZIP (29 KB) - PSpice Model
SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SIMULATION TOOLS Download
SPICE-based analog simulation program
TINA-TI 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 (...)
document-generic User guide

Reference designs

REFERENCE DESIGNS Download
Current Shunt Monitor with Transient Robustness Reference Design
TIDA-00302 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 (...)

document-generic Schematic document-generic User guide
Design files

CAD/CAE symbols

Package Pins Download
SC70 (DCK) 6 View options
SOT-23 (DBV) 5 View options

Ordering & quality

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