Product details

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
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
SOIC (D) 8 19 mm² 4.9 x 3.9 TSSOP (PW) 8 19 mm² 3 x 6.4
  • 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)
  • 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)

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.

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
* Data sheet INA240 High- and Low-Side, Bidirectional, Zero-Drift, Current-Sense Amplifier With Enhanced PWM Rejection datasheet (Rev. B) 13 Feb 2018
Application note Low-Drift, Precision, In-Line Motor Current Measurements With PWM Rejection (Rev. C) 28 Sep 2021
Selection guide Current Sense Amplifiers (Rev. E) 20 Sep 2021
Application note Circuit to measure multiple redundant source currents with singled-ended signal 28 Jun 2021
Application note Under the Hood: Output Swing Limitations of Current Sense Amplifiers 16 Jun 2021
Technical article Solving the multidecade current-measurement challenge in your 48-V BMS application 14 Jun 2021
Application note High-Side Motor Current Monitoring for Over-Current Protection (Rev. B) 23 Feb 2021
Technical article How current-sense amplifiers monitor satellite health 08 Feb 2021
Application note Current Sensing in an H-Bridge (Rev. B) 05 Feb 2021
Application note Current Measurements in Power Supplies (Rev. B) 29 Dec 2020
Application note Current Mode Control in Switching Power Supplies (Rev. B) 29 Dec 2020
Application note Current Sensing Applications in Communication Infrastructure Equipment (Rev. A) 29 Dec 2020
Application note Precision Current Measurements on High-Voltage Power-Supply Rails (Rev. D) 29 Dec 2020
Application note Current Sensing in a Programmable Logic Controller (PLC) (Rev. A) 04 Dec 2020
Application note High-Side Drive, High-Side Solenoid Monitor With PWM Rejection (Rev. C) 04 Dec 2020
Application note Difference Between an Instrumentation Amplifier and a Current Sense Amplifier 03 Apr 2020
E-book Ein Techniker-Leitfaden für Industrieroboter-Designs 25 Mar 2020
E-book E-book: An engineer’s guide to industrial robot designs 12 Feb 2020
E-book Simplifying Current Sensing (Rev. A) 09 Jan 2020
Technical article How current sensors help monitor and protect the world’s wireless infrastructure 30 Dec 2019
Technical article Current-sensing dynamics in automotive solenoids 01 Nov 2019
Application note Bidirectional current sensing with a window comparator circuit 16 Sep 2019
Application note Dual-Axis Motor Control Using FCL and SFRA On a Single C2000™ MCU 07 Aug 2019
Application note High-side, bidirectional current-sensing circuit with transient protection (Rev. A) 19 Feb 2019
Application note Dual Motor Ctl Using FCL and Perf Analysis Using SFRA on TMS320F28379D LaunchPad (Rev. A) 20 Mar 2018
Application note Performance Analysis of Fast Current Loop (FCL) in Servo 06 Mar 2018
Application note Current Sense Amplifiers in Class-D Audio Subsystems 27 Dec 2017
Application note Low Temperature Drift Integrated Shunt vs Active Temp Compensation of Shunt 27 Dec 2017
Application note High-current battery monitor circuit: 0–10A, 0-10kHz, 18 bit 22 Dec 2017
Application note Low-Drift, Low-Side Current Measurements for Three-Phase Systems (Rev. B) 05 Sep 2017
User guide INA240 EVM User's Guide (Rev. A) 17 Jul 2017
Application note Benefits of Intergated Low Inductive Shunt for PWM Applications 17 Jun 2017
Application note Precision LED Brightness and Color Mixing With Discrete Current Sense Amplifiers 28 Feb 2017
White paper Making factories smarter, more productive through predictive maintenance 02 Nov 2016
Application note Current Sensing for Inline Motor-Control Applications 20 Oct 2016

Design & development

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

Evaluation board

INA240EVM — High or Low Side Current Sensing Amplifier for PWM Applications Evaluation Module

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 (...)

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Evaluation board

PSEMTHR24EVM-081 — Mother board for 24-port IEEE 802.3bt ready PSE system

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.

Daughter card

BOOSTXL-3PHGANINV — 48-V Three-Phase Inverter With Shunt-Based In-Line Motor Phase Current Sensing Evaluation Module

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.

MathWorks MATLAB & Simulink example models include the following:

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Limit: 3
Simulation model

INA240 TINA-TI Spice Model (Rev. A)

SBOMAC7A.ZIP (28 KB) - TINA-TI Spice Model
Simulation model

INA240 TINA-TI Reference Design (Rev. A)

SBOMAC8A.TSC (440 KB) - TINA-TI Reference Design
Simulation model

Bidirectional Current Sensing with Window Comparator Circuit Reference Design

SBOMB05.TSC (4533 KB) - TINA-TI Reference Design
Simulation model

INA240 PSpice Model

SBOMB42.ZIP (48 KB) - PSpice Model
Simulation model

INA240A3 PSpice Model

SBOMBC6.ZIP (23 KB) - PSpice Model
Simulation model

INA240A1 PSpice Model

SBOMBE4.ZIP (23 KB) - PSpice Model
Simulation model

INA240A2 PSpice Model

SBOMBG4.ZIP (23 KB) - PSpice Model
Simulation model

INA240A4 PSpice Model

SBOMBG5.ZIP (25 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 (...)
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 (...)
Design tool

CIRCUIT060030 — High-side, bidirectional current-sensing circuit with transient protection

This high-side, bidirectional current sensing solution can accurately measure current in the range of –40 A to 40 A for a 36-V voltage bus. The linear voltage output is 100 mV to 4.90 V. This solution is also designed to survive IEC61000-4-4 level 4 EFT stress (Voc = 2 kV; Isc = 40 A; 8/20 (...)
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 (...)
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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