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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, Ultra precise Rating Catalog Operating temperature range (C) -40 to 125 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

  • 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:
      • Gain Error: 0.20% (Maximum)
      • Gain Drift: 2.5 ppm/°C (Maximum)
    • Offset:
      • Offset Voltage: ±25 µV (Maximum)
      • Offset Drift: 250 nV/°C (Maximum)
  • Available Gains:
    • INA240A1: 20 V/V
    • INA240A2: 50 V/V
    • INA240A3: 100 V/V
    • INA240A4: 200 V/V
  • Quiescent Current: 2.4 mA (Maximum)

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Description

The INA240 device is a 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. All 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.

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Technical documentation

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Type Title Date
* Datasheet INA240 High- and Low-Side, Bidirectional, Zero-Drift, Current-Sense Amplifier With Enhanced PWM Rejection datasheet (Rev. B) Feb. 13, 2018
Application note High-Side Motor Current Monitoring for Over-Current Protection (Rev. B) Feb. 23, 2021
Technical article How current-sense amplifiers monitor satellite health Feb. 08, 2021
Application note Current Sensing in an H-Bridge (Rev. B) Feb. 05, 2021
Application note Current Measurements in Power Supplies (Rev. B) Dec. 29, 2020
Application note Current Mode Control in Switching Power Supplies (Rev. B) Dec. 29, 2020
Application note Current Sensing Applications in Communication Infrastructure Equipment (Rev. A) Dec. 29, 2020
Application note Precision Current Measurements on High-Voltage Power-Supply Rails (Rev. D) Dec. 29, 2020
Application note Current Sensing in a Programmable Logic Controller (PLC) (Rev. A) Dec. 04, 2020
Application note High-Side Drive, High-Side Solenoid Monitor With PWM Rejection (Rev. C) Dec. 04, 2020
Application note The Difference Between an Instrumentation Amplifier and a Current Sense Amplifie Apr. 03, 2020
E-book Ein Techniker-Leitfaden für Industrieroboter-Designs Mar. 25, 2020
E-book E-book: An engineer’s guide to industrial robot designs Feb. 12, 2020
E-book Simplifying Current Sensing (Rev. A) Jan. 09, 2020
Technical article How current sensors help monitor and protect the world’s wireless infrastructure Dec. 30, 2019
Technical article Current-sensing dynamics in automotive solenoids Nov. 01, 2019
Application note Bidirectional current sensing with a window comparator circuit Sep. 16, 2019
Application note Dual-Axis Motor Control Using FCL and SFRA On a Single C2000™ MCU Aug. 07, 2019
Application note High-side, bidirectional current-sensing circuit with transient protection (Rev. A) Feb. 19, 2019
Technical article Anything but discrete: How to simplify 48-V to 60-V DC-fed three-phase inverter design Feb. 01, 2019
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 Current Sense Amplifiers in Class-D Audio Subsystems Dec. 27, 2017
Application note Low Temperature Drift Integrated Shunt vs Active Temp Compensation of Shunt Dec. 27, 2017
Application note High-current battery monitor circuit: 0–10A, 0-10kHz, 18 bit Dec. 22, 2017
Application note Low-Drift, Low-Side Current Measurements for Three-Phase Systems (Rev. B) Sep. 05, 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
Application note Precision LED Brightness and Color Mixing With Discrete Current Sense Amplifiers Feb. 28, 2017
White paper Making factories smarter, more productive through predictive maintenance Nov. 02, 2016
Application note Current Sensing for Inline Motor-Control Applications Oct. 20, 2016

Design & development

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Hardware development

EVALUATION BOARD Download
document-generic User guide
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
EVALUATION BOARD Download
document-generic User guide
Description

PSEMTHR24EVM-081 is the base board for the TPS23881 and TPS23882 PSE controllers. This board contains 24 2-Pair / 4-Pair ports that can that can be used to send up to 30W/port for IEEE 802.3at applications and up to 90W/port for IEEE 802.3bt applications.

Features
  • 24 port PoE PSE system and expandable to 48 ports
  • Highly flexible system with configurable GUI and host interface
  • Multiport power management
  • IEEE802.3bt compliance
  • Mutiple power supplies
  • Supporting legacy powered devices
DAUGHTER CARD Download
document-generic User guide
49
Description
The BOOSTXL-3PHGANINV evaluation module features a 48-V/10-A three-phase GaN inverter with precision in-line shunt-based phase current sensing for accurate control of precision drives such as servo drives.
Features
  • Wide Input Voltage Range 12-V to 60-V Three Phase GaN Inverter with 7-ARMS Output Current per Phase
  • High Accuracy Phase Current Sensing Over Temperature Range From –25°C to 85°C
  • Precision In-Line Phase Current Sensing
  • TI BoosterPack Compatible Interface

Get started

  • See the Get Started sections of (...)

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
SBOMB05.TSC (4533 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 (...)
document-generic User guide
CALCULATION TOOL Download
SBOR020A.ZIP (525 KB)

Reference designs

Many TI reference designs include the INA240 Use our reference design selection tool to review and identify designs that best match your application and parameters.

CAD/CAE symbols

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

Ordering & quality

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  • Ongoing reliability monitoring

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