INA250

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)	18 Dec 2015
	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	Integrating a Current Sense Resistor With a Current Sense Amplifier (Rev. B)	20 Jul 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
	User guide	INA250EVM User Guide (Rev. A)	03 Dec 2015
	Design guide	30-A Range Bidirectional Current Shunt Monitor Design Guide	30 Jun 2015
	User 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

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Simulation model

INA250 TINA-TI Spice Model

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

Simulation model

INA250 TINA-TI Reference Design

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

Simulation model

INA250A4 PSpice Model

SBOMBC3.ZIP (24 KB) - PSpice Model

Simulation model

INA250A1 PSpice Model

SBOMBC7.ZIP (23 KB) - PSpice Model

Simulation model

INA250A3 PSpice Model

SBOMBF5.ZIP (24 KB) - PSpice Model

Simulation model

INA250A2 PSpice Model

SBOMBF7.ZIP (24 KB) - PSpice Model

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

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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-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 (...)

Schematic

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 (...)

Schematic

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 (...)