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Product details

Parameters

Common mode voltage (Max) (V) 80 Common mode voltage (Min) (V) -4 Input offset (+/-) (Max) (uV) 25 Input offset drift (+/-) (Typ) (uV/C) 0.05 Gain (V/V) 100, 20, 200, 50 Gain error (%) 0.2 Gain error drift (+/-) (Max) (ppm/°C) 2.5 CMRR (Min) (dB) 120 Bandwidth (kHz) 400 Supply voltage (Max) (V) 5.5 Supply voltage (Min) (V) 2.7 Iq (Max) (mA) 2.6 Number of channels (#) 1 Comparators (#) 0 Features Bi-directional, Enhanced PWM Rejection, Low-side Capable Rating Automotive TI functional safety category Functional Safety-Capable Operating temperature range (C) -40 to 125, -40 to 150 open-in-new Find other Current sense amplifiers analog output

Package | Pins | Size

SOIC (D) 8 19 mm² 4.9 x 3.9 TSSOP (PW) 8 19 mm² 3 x 6.4 open-in-new Find other Current sense amplifiers analog output

Features

  • AEC-Q100 Qualified for Automotive Applications
    • Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature Range
    • Temperature Grade 0: –40°C to +150°C Ambient Operating Temperature Range
    • HBM ESD Classification Level H2
    • CDM ESD Classification Level C5
  • Functional Safety-Capable
  • Enhanced PWM Rejection
  • Excellent CMRR:
    • 132-dB DC CMRR
    • 93-dB AC CMRR at 50 kHz
  • Wide Common-Mode Range: –4 V to 80 V
  • Accuracy:
    • Gain Error: 0.20% (Maximum) With 2.5 ppm/°C (Maximum Drift)
    • Offset Voltage: ±25 µV (Maximum) With 250 nV/°C (Maximum Drift)
  • Available Gains:
    • INA240A1-Q1: 20 V/V
    • INA240A2-Q1: 50 V/V
    • INA240A3-Q1: 100 V/V
    • INA240A4-Q1: 200 V/V

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Description

The INA240-Q1 device is an automotive-qualified, voltage-output, current-sense amplifier with enhanced PWM rejection that can sense drops across shunt resistors over a wide common-mode voltage range from –4 V to 80 V, independent of the supply voltage. The negative common-mode voltage allows the device to operate below ground, accommodating the flyback period of typical solenoid applications. Enhanced PWM rejection provides high levels of suppression for large common-mode transients (ΔV/Δt) in systems that use pulse width modulation (PWM) signals (such as motor drives and solenoid control systems). This feature allows for accurate current measurements without large transients and associated recovery ripple on the output voltage.

This device operates from a single 2.7-V to 5.5-V power supply, drawing a maximum of 2.4 mA of supply current. Four fixed gains are available: 20 V/V, 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. Grade 1 versions are specified over the extended operating temperature range (–40°C to +125°C) and are offered in an 8-pin TSSOP and 8-pin SOIC packages. Grade 0 versions are specified over the extended operating temperature range (–40°C to +150°C) and are offered in an 8-pin SOIC package.

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Technical documentation

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Type Title Date
* Datasheet INA240-Q1 Automotive, Wide Common-Mode Range, High- and Low-Side, Bidirectional, Zero-Drift, Current-Sense Amplifier With Enhanced PWM Rejection datasheet (Rev. D) Apr. 24, 2020
Functional safety information INA240-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMEA (Rev. A) Mar. 23, 2020
E-book Simplifying Current Sensing (Rev. A) Jan. 09, 2020
Application note Evaluating Current Sensing Amplifiers in Body Control Modules Using Simulation Dec. 16, 2019
Technical articles Current-sensing dynamics in automotive solenoids Nov. 01, 2019
Application note 12-V Battery Monitoring in an Automotive Module Mar. 06, 2019
Application note High-side, bidirectional current-sensing circuit with transient protection (Rev. A) Feb. 19, 2019
Application note Precision current measurements on high-voltage power-supply rails (Rev. C) Feb. 19, 2019
Application note Shunt-based current-sensing solutions for BMS applications in HEVs and EVs (Rev. A) Jan. 31, 2019
Technical articles A key to accurate system thermal management: monitoring both current flow and temperature Oct. 04, 2018
Application note Current Measurements in Power Supplies (Rev. A) Jul. 20, 2018
Application note Current Mode Control in Switching Power Supplies (Rev. A) Jul. 20, 2018
Application note Current Sensing in an H-Bridge (Rev. A) Jul. 20, 2018
Application note High-Side Drive, High-Side Solenoid Monitor With PWM Rejection (Rev. B) Jul. 20, 2018
Application note Integrating a Current Sense Resistor With a Current Sense Amplifier (Rev. B) Jul. 20, 2018
Application note Low-Drift, Precision, In-Line Motor Current Measurements With PWM Rejection (Rev. B) Jul. 20, 2018
Selection guide Current Sense Amplifiers (Rev. D) Apr. 04, 2018
Application note Dual Motor Ctl Using FCL and Perf Analysis Using SFRA on TMS320F28379D LaunchPad (Rev. A) Mar. 20, 2018
Application note Performance Analysis of Fast Current Loop (FCL) in Servo Mar. 06, 2018
Application note Low-Drift, Low-Side Current Measurements for Three-Phase Systems (Rev. B) Sep. 05, 2017
Technical articles Understanding current sensing in HEV/EV batteries Aug. 02, 2017
User guide INA240 EVM User's Guide (Rev. A) Jul. 17, 2017
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
Application note Precision LED Brightness and Color Mixing With Discrete Current Sense Amplifiers Feb. 28, 2017
Application note High-Side Motor Current Monitoring for Over-Current Protection (Rev. A) Dec. 01, 2016
Application note Current Sensing for Inline Motor-Control Applications Oct. 20, 2016

Design & development

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

Hardware development

EVALUATION BOARD Download
25
Description

Evaluate the performance of the INA240 current sense amplifier with the INA240 evaluation module. The INA240EVM package includes one large PCB that can be broken apart into four separate PCBs, one for each of the four gain versions (INA240A1/A2/A3/A4).

 The EVM includes test points for external (...)

Features
  • Simple access to all device pins
  • Multiple input signal options
  • Space for optional input filtering
  • Configurable reference pins

Design tools & simulation

SIMULATION MODEL Download
SBOMAC7A.ZIP (28 KB) - TINA-TI Spice Model
SIMULATION MODEL Download
SBOMAC8A.TSC (440 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SBOMB42.ZIP (48 KB) - PSpice Model
SIMULATION MODEL Download
SBOMBC6.ZIP (23 KB) - PSpice Model
SIMULATION MODEL Download
SBOMBE4.ZIP (23 KB) - PSpice Model
SIMULATION MODEL Download
SBOMBG4.ZIP (23 KB) - PSpice Model
SIMULATION MODEL Download
SBOMBG5.ZIP (25 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
  • (...)
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 (...)
CALCULATION TOOL Download
SBOR020.ZIP (483 KB)

Reference designs

REFERENCE DESIGNS Download
Automotive Brushed-Motor Ripple Counter Reference Design for Sensorless Position Measurement
TIDA-01421 — The demand to retain memory on the position of the seat, window, sliding door, mirror, lift-gate, and others driven by that motor has increased as small motors within the modern automotive vehicle continue to evolve. Existing solutions utilize multiple magnetic sensors attached to the body of a (...)
document-generic Schematic
REFERENCE DESIGNS Download
Automotive, mA-to-kA Range, Current Shunt Sensor Reference Design
TIDA-03050 — This reference design shows how to detect current from the mA-to-KA range using a busbar-type shunt resistor. The increasing demand of high-capacity batteries in electric vehicles (EVs) and hybrid electric vehicles (HEVs) drives the requirement for larger current spans and highly-accurate current (...)
document-generic Schematic
REFERENCE DESIGNS Download
Reference Design for Automotive, Proportional-Solenoid Current Sensor
TIDA-01506 — Precision control of automotive proportional solenoids is necessary to achieve the precise control in an automatic transmission, in electronic fuel injectors, and in several automotive actuator applications. In proportional solenoids, the current flowing through the coil is directly  oportional (...)
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

CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options
TSSOP (PW) 8 View options

Ordering & quality

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

Support & training

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