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Analog current-sense amplifiers

INA199

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26V, bi-directional current sense amplifier

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Data sheet

INA199

ACTIVE
Data sheet Order now

Product details

Product type Analog output Common-mode voltage (max) (V) 26 Common-mode voltage (min) (V) -0.3 Input offset (±) (max) (µV) 150 Input offset drift (±) (typ) (µV/°C) 0.1 Features Bidirectional, Low-side Capable Rating Catalog Voltage gain (V/V) 50, 100, 200 CMRR (min) (dB) 100 Bandwidth (kHz) 14, 30, 80 Supply voltage (max) (V) 26 Supply voltage (min) (V) 2.7 Iq (max) (mA) 0.115 Number of channels 1 Comparators (#) 0 Gain error (%) 0.9, 1.4 Gain error drift (±) (max) (ppm/°C) 10 Slew rate (V/µs) 0.4 Operating temperature range (°C) -40 to 125
Product type Analog output Common-mode voltage (max) (V) 26 Common-mode voltage (min) (V) -0.3 Input offset (±) (max) (µV) 150 Input offset drift (±) (typ) (µV/°C) 0.1 Features Bidirectional, Low-side Capable Rating Catalog Voltage gain (V/V) 50, 100, 200 CMRR (min) (dB) 100 Bandwidth (kHz) 14, 30, 80 Supply voltage (max) (V) 26 Supply voltage (min) (V) 2.7 Iq (max) (mA) 0.115 Number of channels 1 Comparators (#) 0 Gain error (%) 0.9, 1.4 Gain error drift (±) (max) (ppm/°C) 10 Slew rate (V/µs) 0.4 Operating temperature range (°C) -40 to 125
SOT-SC70 (DCK) 6 4.2 mm² 2 x 2.1 UQFN (RSW) 10 2.52 mm² 1.8 x 1.4
  • Wide Common-Mode Range: –0.3 V to 26 V
  • Offset Voltage: ±150 µV (Maximum) (Enables Shunt Drops of 10-mV Full-Scale)
  • Accuracy:
    • Gain Error (Maximum Over Temperature):
      • ±1% (C Version)
      • ±1.5% (A and B Versions)
    • 0.5-µV/°C Offset Drift (Maximum)
    • 10-ppm/°C Gain Drift (Maximum)
  • Choice of Gains:
    • INA199x1: 50 V/V
    • INA199x2: 100 V/V
    • INA199x3: 200 V/V
  • Quiescent Current: 100 µA (Maximum)
  • Packages: 6-Pin SC70, 10-Pin UQFN
  • Wide Common-Mode Range: –0.3 V to 26 V
  • Offset Voltage: ±150 µV (Maximum) (Enables Shunt Drops of 10-mV Full-Scale)
  • Accuracy:
    • Gain Error (Maximum Over Temperature):
      • ±1% (C Version)
      • ±1.5% (A and B Versions)
    • 0.5-µV/°C Offset Drift (Maximum)
    • 10-ppm/°C Gain Drift (Maximum)
  • Choice of Gains:
    • INA199x1: 50 V/V
    • INA199x2: 100 V/V
    • INA199x3: 200 V/V
  • Quiescent Current: 100 µA (Maximum)
  • Packages: 6-Pin SC70, 10-Pin UQFN

The INA199 series of voltage-output, current-shunt monitors (also called current-sense amplifiers) are commonly used for overcurrent protection, precision-current measurement for system optimization, or in closed-loop feedback circuits. This series of devices can sense drops across shunt resistors at common-mode voltages from –0.3 V to 26 V, independent of the supply voltage. Three fixed gains are available: 50 V/V, 100 V/V, and 200 V/V. The low offset of the zero-drift architecture enables current sensing with maximum drops across the shunt as low as 10-mV full-scale.

These devices operate from a single 2.7-V to 26-V power supply, drawing a maximum of 100 µA of supply current. All versions are specified from –40°C to 125°C, and offered in both SC70-6 and thin UQFN-10 packages.

The INA199 series of voltage-output, current-shunt monitors (also called current-sense amplifiers) are commonly used for overcurrent protection, precision-current measurement for system optimization, or in closed-loop feedback circuits. This series of devices can sense drops across shunt resistors at common-mode voltages from –0.3 V to 26 V, independent of the supply voltage. Three fixed gains are available: 50 V/V, 100 V/V, and 200 V/V. The low offset of the zero-drift architecture enables current sensing with maximum drops across the shunt as low as 10-mV full-scale.

These devices operate from a single 2.7-V to 26-V power supply, drawing a maximum of 100 µA of supply current. All versions are specified from –40°C to 125°C, and offered in both SC70-6 and thin UQFN-10 packages.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet INA199 26-V, Bidirectional, Zero-Drift, Low- or High-Side,Voltage-Output, Current-Shunt Monitor datasheet (Rev. H) PDF | HTML 17 Oct 2023
Application note Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers PDF | HTML 18 Nov 2024
Application brief Precision Current Measurements on High-Voltage Power-Supply Rails (Rev. F) PDF | HTML 17 Oct 2022
E-book An Engineer's Guide to Current Sensing (Rev. B) 12 Apr 2022
Application note Using a PCB Copper Trace as a Current-Sense Shunt Resistor PDF | HTML 25 Jan 2022
Application brief Integrating the Current Sensing Signal Path (Rev. B) PDF | HTML 29 Sep 2021
Selection guide Current Sense Amplifiers (Rev. E) 20 Sep 2021
Analog Design Journal Current sensing in high‐power USB Type‐C applications 21 Dec 2020
Circuit design Low-Drift, Low-Side, Bidirectional Current Sensing Circuit (Rev. A) PDF | HTML 02 Dec 2020
Application brief External current sense amps vs integrated onboard amplifiers for current sensing (Rev. B) 19 Feb 2019
Application note Closed-Loop Analysis of Load-Induced Amplifier Stability Issues Using Zout 27 Oct 2017
Technical article Precise constant current regulation helps advance fast-charging PDF | HTML 15 Jun 2017
Application brief Low-Side Current Sense Circuit Integration 30 Mar 2017
White paper Overcurrent protection enables more efficient and reliable systems 16 May 2016
Technical article How to get started with current sense amplifiers – part 4 PDF | HTML 16 Jul 2015
Technical article What are you sensing? Re-thinking system efficiency and reliability - part 1 PDF | HTML 27 May 2015
Technical article How to get started with current sense amplifiers – part 1 PDF | HTML 19 May 2015

Design & development

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

Evaluation board

INA199EVM — INA199 Evaluation Module

The INA199B1-B3 devices are voltage output, high-side measurement, bi-directional, zero-drift current

shunt monitors. The INA199EVM is intended to provide basic functional evaluation of this device family.  The fixture layout is not intended to be a model for the target circuit, nor is it laid (...)

User guide: PDF
Not available on TI.com
Simulation model

INA199A1 PSpice Model

SBOMBC8.ZIP (24 KB) - PSpice Model
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Simulation model

INA199A1 TINA Reference Design

SBOM926.TSC (252 KB) - TINA-TI Reference Design
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Simulation model

INA199A1 TINA Spice Macromodel

SBOM925.ZIP (7 KB) - TINA-TI Spice Model
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Simulation model

INA199A2 PSpice Model

SBOMBC1.ZIP (24 KB) - PSpice Model
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Simulation model

INA199A2 TINA Reference Design

SBOM928.TSC (253 KB) - TINA-TI Reference Design
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Simulation model

INA199A2 TINA Spice Macromodel

SBOM927.ZIP (7 KB) - TINA-TI Spice Model
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Simulation model

INA199A3 PSpice Model

SBOMBD0.ZIP (24 KB) - PSpice Model
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Simulation model

INA199A3 TINA Reference Design

SBOM930.TSC (253 KB) - TINA-TI Reference Design
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Simulation model

INA199A3 TINA Spice Macromodel

SBOM929.ZIP (7 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 (...)

Supported products & hardware

Supported products & hardware
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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 (...)
Supported products & hardware

Supported products & hardware
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Design tool

CIRCUIT060033 — Low-drift, low-side, bidirectional current sensing circuit with integrated precision gain

The low-side bidirectional current-shunt monitor solution illustrated in the following image can accurately measure currents from –4 A to 4 A, and the design parameters can easily be changed for different current measurement ranges. Current-shunt monitors from the INA21x family have (...)
User guide: PDF
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Design tool

CIRCUIT060035 — Bidirectional current sensing with a window comparator circuit

This bidirectional current sensing solution uses a current-sense amplifier and a high-speed dual comparator with a rail-to-rail input common mode range to create over-current (OC) alert signals at the comparator outputs (OUTA and OUTB) if the input current (IG1) rises above 100 A or falls below (...)
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Design tool

CIRCUIT060037 — Precision over-current latch circuit

This high-side, current sensing solution uses a current sense amplifier, a comparator with an integrated reference and a P-channel MOSFET to create an over-current latch circuit. When a load current greater than 200 mA is detected, the circuit disconnects the system from its power source. The (...)
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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 (...)
User guide: PDF
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Reference designs

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 (...)

Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00753 — Three Phase AC Current Measurements Using Current Transformer Reference Design

The TIDA-00753 reference design demonstrates high accuracy wide range AC current measurement for a three phase motor using the INA199 zero drift current shunt monitor. The design also has low power consumption of 25mW for Gain stage of 200 as compared to a discrete solution. The design footprint (...)
Design guide: PDF
Schematic: PDF
Reference designs

PMP10594 — 97% efficiency, 125W, Wide input Synchronous 4-Switch Buck-Boost Battery Charger Reference Design

PMP10594 is a synchronous 4-switch buck-boost converter reference design which utilizes the LM5175 controller for battery charger applications. The output voltage set point can be adjusted by a PWM signal over the range of 7.1V to 9.2V. I2C programming allows independent control of the (...)
Test report: PDF
Schematic: PDF
Reference designs

TIDA-00748 — 60W Synchronous Boost LED Driver Reference Design for Automotive Application

TIDA-00748 is a 60W Synchronous Boost Design for automotive LED application utilizing the Synchronous Boost Converter LM5122-Q1.  This design applies to automotive lighting for exterior lighting such as headlights and taillights and also interior LED lighting systems. The design accepts an (...)
Test report: PDF
Schematic: PDF
Reference designs

TIDM-LPSM — Low Power Micro Stepper Motor Driver Reference Design Using FRAM

Controlled by the  MSP-EXP430FR5969 FRAM LaunchPad, this 20-pin boosterpack utilizes the DRV8836 motor driver for operating low-voltage stepper motors with minimal power consumption to better optimize battery life.  Micro stepping logic provides for smooth motor steps, a INA199 current (...)
Design guide: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
SOT-SC70 (DCK) 6 Ultra Librarian
UQFN (RSW) 10 Ultra Librarian
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