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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 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 notes The Difference Between an Instrumentation Amplifier and a Current Sense Amplifie Apr. 03, 2020
White papers Ein Techniker-Leitfaden für Industrieroboter-Designs Mar. 25, 2020
White papers E-book: An engineer’s guide to industrial robot designs Feb. 12, 2020
White papers Simplifying Current Sensing (Rev. A) Jan. 09, 2020
Technical articles How current sensors help monitor and protect the world’s wireless infrastructure Dec. 30, 2019
Technical articles Current-sensing dynamics in automotive solenoids Nov. 01, 2019
Application notes Current Sensing Applications in Communication Infrastructure Equipment Sep. 19, 2019
Application notes Bidirectional current sensing with a window comparator circuit Sep. 16, 2019
Application notes Dual-Axis Motor Control Using FCL and SFRA On a Single C2000™ MCU Aug. 07, 2019
Application notes High-side, bidirectional current-sensing circuit with transient protection (Rev. A) Feb. 19, 2019
Application notes Precision current measurements on high-voltage power-supply rails (Rev. C) Feb. 19, 2019
Technical articles Anything but discrete: How to simplify 48-V to 60-V DC-fed three-phase inverter design Feb. 01, 2019
Technical articles A key to accurate system thermal management: monitoring both current flow and temperature Oct. 04, 2018
Application notes Power-Saving Topologies for TI Current Shunt Monitors (Rev. A) Aug. 01, 2018
Application notes Current Measurements in Power Supplies (Rev. A) Jul. 20, 2018
Application notes Current Mode Control in Switching Power Supplies (Rev. A) Jul. 20, 2018
Application notes Current Sensing in an H-Bridge (Rev. A) Jul. 20, 2018
Application notes High-Side Drive, High-Side Solenoid Monitor With PWM Rejection (Rev. B) Jul. 20, 2018
Application notes Low-Drift, Precision, In-Line Motor Current Measurements With PWM Rejection (Rev. B) Jul. 20, 2018
Selection guides Current Sense Amplifiers (Rev. D) Apr. 04, 2018
Application notes Dual Motor Ctl Using FCL and Perf Analysis Using SFRA on TMS320F28379D LaunchPad (Rev. A) Mar. 20, 2018
Application notes Performance Analysis of Fast Current Loop (FCL) in Servo Mar. 06, 2018
Application notes Current Sense Amplifiers in Class-D Audio Subsystems Dec. 27, 2017
Application notes Low Temperature Drift Integrated Shunt vs Active Temp Compensation of Shunt Dec. 27, 2017
Application notes High-current battery monitor circuit: 0–10A, 0-10kHz, 18 bit Dec. 22, 2017
Application notes Low-Drift, Low-Side Current Measurements for Three-Phase Systems (Rev. B) Sep. 05, 2017
User guides INA240 EVM User's Guide (Rev. A) Jul. 17, 2017
Application notes Benefits of Intergated Low Inductive Shunt for PWM Applications Jun. 17, 2017
Application notes Current Sensing in a Programmable Logic Controller (PLC) May 03, 2017
Application notes Precision LED Brightness and Color Mixing With Discrete Current Sense Amplifiers Feb. 28, 2017
Application notes High-Side Motor Current Monitoring for Over-Current Protection (Rev. A) Dec. 01, 2016
White papers Making factories smarter, more productive through predictive maintenance Nov. 02, 2016
Application notes 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 BOARDS Download
document-generic User guide
$49.00
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 (...)
EVALUATION BOARDS Download
document-generic User guide
$25.00
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 BOARDS Download
document-generic User guide
Description
The PSEMTHR24EVM-081 mother board features 24 port 2pair/4pair PSE system. When paired with the TPS23881EVM-083 48-channel 4-Pair (90W) PSE daughter card or TPS23882EVM-084 24-channel 2-Pair (30W) PSE daughter card and PSEMCUDAUEVM-082 MCU daughter card (sold separately), users can evaluate this (...)
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 PD

Design tools & simulation

SIMULATION MODELS Download
SBOMAC7A.ZIP (28 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SBOMAC8A.TSC (440 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SBOMB05.TSC (4533 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SBOMB42.ZIP (48 KB) - PSpice Model
SIMULATION TOOLS 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

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

Support & training

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