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Current sense amplifiers analog output

INA199

ACTIVE

26V, bi-directional current sense amplifier

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Data sheet

INA199

ACTIVE
Data sheet Order now

Product details

Common mode voltage (Max) (V) 26 Common mode voltage (Min) (V) -0.1 Input offset (+/-) (Max) (uV) 150 Input offset drift (+/-) (Typ) (uV/C) 0.1 Gain (V/V) 100, 200, 50 Gain error (%) 1.5, 1 Gain error drift (+/-) (Max) (ppm/°C) 10 CMRR (Min) (dB) 100 Bandwidth (kHz) 80, 30, 14 Supply voltage (Max) (V) 26 Supply voltage (Min) (V) 2.7 Iq (Max) (mA) 0.115 Number of channels (#) 1 Comparators (#) 0 Features Bi-directional, Low-side Capable Rating Catalog Operating temperature range (C) -40 to 125
Common mode voltage (Max) (V) 26 Common mode voltage (Min) (V) -0.1 Input offset (+/-) (Max) (uV) 150 Input offset drift (+/-) (Typ) (uV/C) 0.1 Gain (V/V) 100, 200, 50 Gain error (%) 1.5, 1 Gain error drift (+/-) (Max) (ppm/°C) 10 CMRR (Min) (dB) 100 Bandwidth (kHz) 80, 30, 14 Supply voltage (Max) (V) 26 Supply voltage (Min) (V) 2.7 Iq (Max) (mA) 0.115 Number of channels (#) 1 Comparators (#) 0 Features Bi-directional, Low-side Capable Rating Catalog Operating temperature range (C) -40 to 125
SOT-SC70 (DCK) 6 4 mm² 2 x 2.1 UQFN (RSW) 10 3 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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Type Title Date
* Data sheet INA199 26-V, Bidirectional, Zero-Drift, Low- or High-Side, Voltage-Output, Current-Shunt Monitor datasheet (Rev. G) PDF | HTML 02 Feb 2017
Application note Precision Current Measurements on High-Voltage Power-Supply Rails (Rev. E) PDF | HTML 30 Mar 2022
Application note Using a PCB Copper Trace as a Current-Sense Shunt Resistor PDF | HTML 25 Jan 2022
Application note Integrating the Current Sensing Signal Path (Rev. B) PDF | HTML 29 Sep 2021
Selection guide Current Sense Amplifiers (Rev. E) 20 Sep 2021
Technical article Solving the multidecade current-measurement challenge in your 48-V BMS application 14 Jun 2021
Technical article How current-sense amplifiers monitor satellite health 08 Feb 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
E-book Simplifying Current Sensing (Rev. A) 09 Jan 2020
Application note External current sense amps vs integrated onboard amplifiers for current sensing (Rev. B) 19 Feb 2019
Technical article A key to accurate system thermal management: monitoring both current flow and temperature 04 Oct 2018
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 15 Jun 2017
Application note Low-Side Current Sense Circuit Integration 30 Mar 2017
EVM User's guide INA199B1-B3EVM User's Guide Hardware Version 2 08 Jul 2016
White paper Overcurrent protection enables more efficient and reliable systems 16 May 2016
EVM User's guide INA199A1-A3EVM User's Guide Hardware Version 1 13 May 2010

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 (...)

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Simulation model

INA199A1 TINA Spice Macromodel

SBOM925.ZIP (7 KB) - TINA-TI Spice 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

INA199A2 TINA Spice Macromodel

SBOM927.ZIP (7 KB) - TINA-TI Spice 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

INA199A3 TINA Spice Macromodel

SBOM929.ZIP (7 KB) - TINA-TI Spice 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

INA199A2 PSpice Model

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

INA199A1 PSpice Model

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

INA199A3 PSpice Model

SBOMBD0.ZIP (24 KB) - PSpice Model
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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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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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Calculation tool

Current Sense Amplifier Comparison and Error Tool (Rev. E)

SBOR020E.ZIP (592 KB)
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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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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 (...)
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 (...)
Schematic: PDF
Reference designs

PMP40133 — Fast Charge Adapter Control Board Using MaxCharge™ Technology Reference Design

The PMP40133 control board provides the interface with fast charger adapter solution. The main MCU is MSP430G2955 which controls communication with a charger device using MaxCharge™ techonlogy. TPL0102-100 digital potentiometer is used for fine tuning the adapter output voltage. 256 (...)
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 (...)
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 (...)
Schematic: PDF
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 (...)

Schematic: PDF
Package Pins Download
SC70 (DCK) 6 View options
UQFN (RSW) 10 View options

Ordering & quality

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