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INA250-Q1

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AEC-Q100, 36V, bi-directional, precision current sense amplifier w/int. shunt resistor

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AEC-Q100, 36V, bi-directional, precision current sense amplifier w/int. shunt resistor

INA250-Q1

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Product details

Parameters

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) 0.35 Number of channels (#) 1 Comparators (#) 0 Features Bi-directional, Integrated Shunt, 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

TSSOP (PW) 16 22 mm² 5 x 4.4 open-in-new Find other Current sense amplifiers analog output

Features

  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature Range
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C5
  • Functional Safety-Capable
  • Precision Integrated Shunt Resistor:
    • Shunt Resistor: 2-mΩ
    • Shunt Resistor Tolerance: 0.1% (Maximum)
    • 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% (Maximum)
    • Offset Current: 50 mA (Maximum, INA250A2-Q1)
  • Four Available Gains:
    • INA250A1-Q1: 200 mV/A
    • INA250A2-Q1: 500 mV/A
    • INA250A3-Q1: 800 mV/A
    • INA250A4-Q1: 2 V/A
  • Wide Common-Mode Range: –0.1 V to 36 V
  • Specified Operating Temperature: –40°C to +125°C

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Description

The automotive qualified INA250-Q1 is a voltage-output, current-sensing amplifier family that integrates an internal precision shunt resistor to enable high-accuracy current measurements at common-mode voltages that may vary from 0 V to 36 V, independent of the supply voltage.

The INA250-Q1 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-Q1 device operates from a single 2.7-V to 36-V supply and draws a maximum of 300 µA of supply current. All INA250-Q1 gain versions are specified over the extended operating temperature range of –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
* Datasheet INA250-Q1, Automotive 36-V, Low- or High-Side, Bidirectional, Zero-Drift Current-Shunt Monitor With Precision Integrated Shunt Resistor datasheet (Rev. B) Apr. 24, 2020
Functional safety information INA250-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA Mar. 23, 2020
Application note Precision, Low-Side Current Measurement (Rev. B) Mar. 06, 2019
Technical articles A key to accurate system thermal management: monitoring both current flow and temperature Oct. 04, 2018
Application note Integrating a Current Sense Resistor With a Current Sense Amplifier (Rev. B) Jul. 20, 2018
Application note Benefits of Intergated Low Inductive Shunt for PWM Applications Jun. 17, 2017
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
User guide INA250EVM User Guide (Rev. A) Dec. 03, 2015
User guide 30-A Range Bidirectional Current Shunt Monitor Design Guide Jun. 30, 2015
Technical articles How to get started with current sense amplifiers – part 2 May 26, 2015
User guide INA250EVM User Guide Mar. 12, 2015

Design & development

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

Hardware development

EVALUATION BOARD Download
49
Description

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 (...)

Features
  • INA250EVM consists of one PCB with an option to cut out four individual PCBs one for each of the four devices (INA250A1, INA250A2, INA250A3 and INA250A4).
  • Ease of access to all device pins.
  • Optional input filter.
  • Banana jack terminals on IN+ and IN- pins for ease of connection.

 

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Design tools & simulation

SIMULATION MODEL Download
SBOM963.ZIP (33 KB) - TINA-TI Spice Model
SIMULATION MODEL Download
SBOM964.TSC (612 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SBOMBC3.ZIP (24 KB) - PSpice Model
SIMULATION MODEL Download
SBOMBC7.ZIP (23 KB) - PSpice Model
SIMULATION MODEL Download
SBOMBF5.ZIP (24 KB) - PSpice Model
SIMULATION MODEL Download
SBOMBF7.ZIP (24 KB) - PSpice Model
SIMULATION TOOL 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
  • (...)
View details
SIMULATION TOOL 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 (...)

Reference designs

REFERENCE DESIGNS Download
30-A Range Bidirectional Current Shunt Monitor Reference Design
TIDA-00614 — 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 (...)
document-generic Schematic
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
Design files
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CAD/CAE symbols

Package Pins Download
TSSOP (PW) 16 View options

Ordering & quality

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  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

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