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Current sense amplifiers analog output

INA250

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36V, bi-directional, precision current sense amplifier w/int. shunt resistor

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Data sheet

INA250

ACTIVE
Data sheet Order now

Product details

Common mode voltage (Max) (V) 36 Common mode voltage (Min) (V) 0 Input offset (+/-) (Max) (uV) 100mA, 50mA, 30mA, 20mA Input offset drift (+/-) (Typ) (uV/C) 250uA/C Gain (V/V) 2000mV/A, 200mV/A, 500mV/A, 800mV/A Gain error (%) 0.3 Gain error drift (+/-) (Max) (ppm/°C) 45 CMRR (Min) (dB) 100 Bandwidth (kHz) 50 Supply voltage (Max) (V) 36 Supply voltage (Min) (V) 2.7 Iq (Max) (mA) 0.30 Number of channels (#) 1 Comparators (#) 0 Features Bi-directional, Integrated Shunt, Low-side Capable Rating Catalog Operating temperature range (C) -40 to 125
Common mode voltage (Max) (V) 36 Common mode voltage (Min) (V) 0 Input offset (+/-) (Max) (uV) 100mA, 50mA, 30mA, 20mA Input offset drift (+/-) (Typ) (uV/C) 250uA/C Gain (V/V) 2000mV/A, 200mV/A, 500mV/A, 800mV/A Gain error (%) 0.3 Gain error drift (+/-) (Max) (ppm/°C) 45 CMRR (Min) (dB) 100 Bandwidth (kHz) 50 Supply voltage (Max) (V) 36 Supply voltage (Min) (V) 2.7 Iq (Max) (mA) 0.30 Number of channels (#) 1 Comparators (#) 0 Features Bi-directional, Integrated Shunt, Low-side Capable Rating Catalog Operating temperature range (C) -40 to 125
TSSOP (PW) 16 22 mm² 5 x 4.4
  • Precision Integrated Shunt Resistor:
    • Shunt Resistor: 2 mΩ
    • Shunt Resistor Tolerance: 0.1% (Max)
    • 15 A Continuous from –40°C to 85°C
    • 0°C to 125°C Temperature Coefficient:
      10 ppm/°C
  • High Accuracy:
    • Gain Error (Shunt and Amplifier): 0.3% (Max)
    • Offset Current: 50 mA (Max, INA250A2)
  • Four Available Gains:
    • INA250A1: 200 mV/A
    • INA250A2: 500 mV/A
    • INA250A3: 800 mV/A
    • INA250A4: 2 V/A
  • Wide Common-Mode Range: –0.1 V to 36 V
  • Specified Operating Temperature: –40°C to 125°C
  • Precision Integrated Shunt Resistor:
    • Shunt Resistor: 2 mΩ
    • Shunt Resistor Tolerance: 0.1% (Max)
    • 15 A Continuous from –40°C to 85°C
    • 0°C to 125°C Temperature Coefficient:
      10 ppm/°C
  • High Accuracy:
    • Gain Error (Shunt and Amplifier): 0.3% (Max)
    • Offset Current: 50 mA (Max, INA250A2)
  • Four Available Gains:
    • INA250A1: 200 mV/A
    • INA250A2: 500 mV/A
    • INA250A3: 800 mV/A
    • INA250A4: 2 V/A
  • Wide Common-Mode Range: –0.1 V to 36 V
  • Specified Operating Temperature: –40°C to 125°C

The INA250 is a voltage-output, current-sensing amplifier family that integrates an internal shunt resistor to enable high-accuracy current measurements at common-mode voltages that can vary from 0 V to 36 V, independent of the supply voltage. The device is a bidirectional, low- or high-side current-shunt monitor that allows an external reference to be used to measure current flowing in both directions through the internal current-sensing resistor sensor. The integration of the precision current-sensing resistor provides calibration equivalent measurement accuracy with ultra-low temperature drift performance and ensures an optimized Kelvin layout for the sensing resistor is always obtained.

The INA250 family is available in four output voltage scales: 200 mV/A, 500 mV/A, 800 mV/A, and 2 V/A. This device is fully tested and specified for continuous currents up to 10 amps at the maximum temperature of 125°C. The INA250 operates from a single 2.7-V to 36-V supply and draws a maximum of 300 µA of supply current. All INA250 gain versions are specified over the extended operating temperature range (–40°C to 125°C), and are available in a TSSOP-16 package.

The INA250 is a voltage-output, current-sensing amplifier family that integrates an internal shunt resistor to enable high-accuracy current measurements at common-mode voltages that can vary from 0 V to 36 V, independent of the supply voltage. The device is a bidirectional, low- or high-side current-shunt monitor that allows an external reference to be used to measure current flowing in both directions through the internal current-sensing resistor sensor. The integration of the precision current-sensing resistor provides calibration equivalent measurement accuracy with ultra-low temperature drift performance and ensures an optimized Kelvin layout for the sensing resistor is always obtained.

The INA250 family is available in four output voltage scales: 200 mV/A, 500 mV/A, 800 mV/A, and 2 V/A. This device is fully tested and specified for continuous currents up to 10 amps at the maximum temperature of 125°C. The INA250 operates from a single 2.7-V to 36-V supply and draws a maximum of 300 µA of supply current. All INA250 gain versions are specified over the extended operating temperature range (–40°C to 125°C), and are available in a TSSOP-16 package.
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Technical documentation

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Type Title Date
* Data sheet INA250 36-V, Low- or High-Side, Bidirectional, Zero-Drift Current-Shunt Monitor with Precision Integrated Shunt Resistor datasheet (Rev. B) PDF | HTML 18 Dec 2015
Application note Integrating the Current Sensing Resistor (Rev. C) PDF | HTML 09 Mar 2022
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
E-book Simplifying Current Sensing (Rev. A) 09 Jan 2020
Application note Precision, Low-Side Current Measurement (Rev. B) 06 Mar 2019
Technical article A key to accurate system thermal management: monitoring both current flow and temperature 04 Oct 2018
Application note Integrated-Resistor Current Sensors Simplify PCB Design 30 Jun 2017
Application note Benefits of Intergated Low Inductive Shunt for PWM Applications 17 Jun 2017
Technical article System trade-offs for high- and low-side current measurements 01 Jun 2017
EVM User's guide INA250EVM User Guide (Rev. A) 03 Dec 2015
Design guide 30-A Range Bidirectional Current Shunt Monitor Design Guide 30 Jun 2015
EVM User's guide INA250EVM User Guide 12 Mar 2015

Design & development

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

Evaluation board

INA250EVM — INA250 Current Shunt Monitor Evaluation Module

INA250 is a family of current shunt monitor with integrated shunt. The INA250EVM (INA250AxEVM) is intended to provide basic functional evaluation of INA250A1, INA250A2, INA250A3 and INA250A4 devices in the family. The fixture layout is not intended to be a model for the target circuit, nor is it (...)

User guide: PDF
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Simulation model

INA250 TINA-TI Reference Design

SBOM964.TSC (612 KB) - TINA-TI Reference Design
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Simulation model

INA250 TINA-TI Spice Model

SBOM963.ZIP (33 KB) - TINA-TI Spice Model
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Simulation model

INA250A1 PSpice Model

SBOMBC7.ZIP (23 KB) - PSpice Model
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Simulation model

INA250A2 PSpice Model

SBOMBF7.ZIP (24 KB) - PSpice Model
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Simulation model

INA250A3 PSpice Model

SBOMBF5.ZIP (24 KB) - PSpice Model
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Simulation model

INA250A4 PSpice Model

SBOMBC3.ZIP (24 KB) - PSpice Model
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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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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-010011 — High efficiency power supply architecture reference design for protection relay processor module

This reference design showcases various power architectures for generating multiple voltage rails for an application processor module, requiring >1A load current and high efficiency . The required power supply is generated using 5-, 12- or 24-V DC input from the backplane. Power supplies are (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00614 —

30-A Range Bidirectional Current Shunt Monitor Reference Design

This verified design can accurately measure current across a range of 30 A on a bus that carries up to 36-V common mode voltage over a range of -40°C to +85°C.  This design can measure current from 0 A to 30 A with a grounded reference or -30 A to 0 A with a 16-V reference.  The (...)
Design guide: PDF
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 (...)

Design guide: PDF
Schematic: PDF
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TSSOP (PW) 16 View options

Ordering & quality

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