Home Amplifiers Current-sense amplifiers Analog current-sense amplifiers
Home
Amplifiers
Current-sense amplifiers
Analog current-sense amplifiers

INA240

ACTIVE

-4 to 80V, bidirectional, ultra-precise current sense amplifier with enhanced PWM rejection

Order now
Data sheet

INA240

ACTIVE
Data sheet Order now

Product details

Product type Analog output Common-mode voltage (max) (V) 80 Common-mode voltage (min) (V) -4 Input offset (±) (max) (µV) 25 Input offset drift (±) (typ) (µV/°C) 0.05 Features Bidirectional, Enhanced PWM Rejection, Low-side Capable, Ultra precise Rating Catalog Voltage gain (V/V) 20, 50, 100, 200 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 Gain error (%) 0.2 Gain error drift (±) (max) (ppm/°C) 2.5 Slew rate (V/µs) 2 Operating temperature range (°C) -40 to 125
Product type Analog output Common-mode voltage (max) (V) 80 Common-mode voltage (min) (V) -4 Input offset (±) (max) (µV) 25 Input offset drift (±) (typ) (µV/°C) 0.05 Features Bidirectional, Enhanced PWM Rejection, Low-side Capable, Ultra precise Rating Catalog Voltage gain (V/V) 20, 50, 100, 200 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 Gain error (%) 0.2 Gain error drift (±) (max) (ppm/°C) 2.5 Slew rate (V/µs) 2 Operating temperature range (°C) -40 to 125
SOIC (D) 8 29.4 mm² 4.9 x 6 TSSOP (PW) 8 19.2 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.
filter Find other Analog current-sense amplifiers
Download View video with transcript Video

Similar products you might be interested in

open-in-new Compare alternates
Drop-in replacement with upgraded functionality to the compared device
INA241A ACTIVE -5-V to 110-V bidirectional ultraprecise current sense amplifier with enhanced PWM rejection PWM rejection device with increased operating voltage, and improved Vos, gain error, CMRR and PSRR performance.
INA241B ACTIVE -5-V to 110-V bidirectional high-precision current sense amplifier with enhanced PWM rejection PWM rejection device with increased operating voltage, and improved gain error & similar CMRR and PSRR performance.

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 46
Top documentation Type Title Format options Date
* Data sheet INA240 –4-V to 80-V, Bidirectional, Ultra-Precise Current Sense Amplifier With Enhanced PWM Rejection datasheet (Rev. C) PDF | HTML 14 Dec 2021
Application note Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers PDF | HTML 18 Nov 2024
Technical article Fast Current Loop performance: better than we thought, and measurable in your own (Rev. A) PDF | HTML 01 Nov 2024
Circuit design Bidirectional current sensing with a window comparator circuit (Rev. A) PDF | HTML 27 Sep 2024
Circuit design High-current battery monitor circuit: 0–10A, 0-10kHz, 18 bit (Rev. A) PDF | HTML 12 Sep 2024
Technical article For efficiencies’ sake – how to integrate bidirectional power flow into your UPS design (part 1) PDF | HTML 11 Jan 2024
Application brief Current Sensing Applications in Communication Infrastructure Equipment (Rev. C) PDF | HTML 08 Aug 2023
Application note Using Current Sense Amplifiers at Near-Zero Vsense PDF | HTML 26 Apr 2023
Application brief Current Mode Control in Switching Power Supplies (Rev. E) PDF | HTML 12 Apr 2023
Application brief Current Sensing in an H-Bridge (Rev. D) PDF | HTML 07 Apr 2023
Application brief Low-Drift, Precision, In-Line Motor Current Measurements With PWM Rejection (Rev. D) PDF | HTML 07 Apr 2023
Application brief Switching Power Supply Current Measurements (Rev. E) PDF | HTML 07 Apr 2023
Application brief Precision Current Measurements on High-Voltage Power-Supply Rails (Rev. F) PDF | HTML 17 Oct 2022
Application brief High-Side Drive, High-Side Solenoid Monitor With PWM Rejection (Rev. D) PDF | HTML 15 Aug 2022
Application brief Current Sense Amplifiers in Class-D Audio Subsystems (Rev. A) PDF | HTML 29 Jul 2022
Application note Driving Voltage Reference Pins of Current-Sensing Amplifiers PDF | HTML 29 Jun 2022
E-book An Engineer's Guide to Current Sensing (Rev. B) 12 Apr 2022
Application brief Safety and Protection for Discrete Digital Outputs in a PLC System Using Current (Rev. B) PDF | HTML 10 Mar 2022
Application brief Introduction to Current Sense Amplifiers PDF | HTML 02 Feb 2022
Application note Using a PCB Copper Trace as a Current-Sense Shunt Resistor PDF | HTML 25 Jan 2022
Application note Grounding Considerations in Current-Sensing Applications PDF | HTML 14 Dec 2021
Selection guide Current Sense Amplifiers (Rev. E) 20 Sep 2021
Circuit design Circuit to measure multiple redundant source currents with singled-ended signal PDF | HTML 28 Jun 2021
Application note Under the Hood: Output Swing Limitations of Current Sense Amplifiers PDF | HTML 16 Jun 2021
Application brief High-Side Motor Current Monitoring for Over-Current Protection (Rev. B) PDF | HTML 23 Feb 2021
Application brief 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
Technical article How current sensors help monitor and protect the world’s wireless infrastructure PDF | HTML 30 Dec 2019
Technical article Current-sensing dynamics in automotive solenoids PDF | HTML 01 Nov 2019
Application note Dual-Axis Motor Control Using FCL and SFRA On a Single C2000™ MCU PDF | HTML 07 Aug 2019
Technical article Anything but discrete: How to simplify 48-V to 60-V DC-fed three-phase inverter de PDF | HTML 01 Feb 2019
Circuit design High-Side, Bidirectional Current-Sensing Circuit with Transient Protection (Rev. A) PDF | HTML 01 Feb 2019
Analog Design Journal Second-sourcing options for small-package amplifiers 26 Mar 2018
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 brief Low Temperature Drift Integrated Shunt vs Active Temp Compensation of Shunt 27 Dec 2017
Technical article For efficiencies’ sake – how to integrate bidirectional power flow (part 2) PDF | HTML 19 Sep 2017
Application brief Low-Drift, Low-Side Current Measurements for Three-Phase Systems (Rev. B) 05 Sep 2017
Application brief Benefits of Intergated Low Inductive Shunt for PWM Applications 17 Jun 2017
Technical article A handy tool for power-supply designs PDF | HTML 10 Apr 2017
Application brief Precision LED Brightness and Color Mixing With Discrete Current Sense Amplifiers 28 Feb 2017
Technical article Gallium nitride transistors open up new frontiers in high-speed motor drives PDF | HTML 12 Dec 2016
Technical article Five benefits of enhanced PWM rejection for in-line motor control PDF | HTML 08 Nov 2016
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 (...)

User guide: PDF
Not available on TI.com
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.

Not available on TI.com
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:

User guide: PDF
Not available on TI.com
Simulation model

Bidirectional Current Sensing with Window Comparator Circuit Reference Design

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

INA240 PSpice Model

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

INA240 TINA-TI Reference Design (Rev. A)

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

INA240 TINA-TI Spice Model (Rev. A)

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

INA240A1 PSpice Model

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

INA240A2 PSpice Model

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

INA240A3 PSpice Model

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

INA240A4 PSpice Model

SBOMBG5.ZIP (25 KB) - PSpice Model
Download
Calculation tool

ANALOG-ENGINEER-CALC — PC software analog engineer's calculator

The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)

Supported products & hardware

Supported products & hardware
Launch Download
Calculation tool

CS-AMPLIFIER-ERROR-TOOL — Current Sense Amplifier Comparison and Error Tool

This Excel calculator provides a comparison between two and five of our standard current sense amplifiers, delivering a chart containing the basic parameters of each device. This calculator also takes system condition inputs from users such as common-mode voltage, supply voltage, shunt resistor (...)
Supported products & hardware

Supported products & hardware
Download
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 (...)
View Options
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 (...)
View Options
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 (...)
View Options
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 (...)
Request
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 (...)
User guide: PDF
View Options
Reference designs

TIDA-050026-23881 — 24-port (PoE 2, 4-pair) power sourcing equipment reference design for multi-port applications

This reference design showcases a Type-4 (PoE 2, 4-Pair) 24-port Ethernet switch for Power over Ethernet (PoE) applications which can send up to 90W per port for for IEEE 802.3bt (PoE 2) applications and up to 120W per port for non-standard applications. Based on the MSP430F523x and MSPM0G1107x (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-050026-23882 — 24-port (PoE 2, 2-pair) power sourcing equipment reference design for multi-port applications ;

This reference design showcases a Type-3, 30W, 2-Pair 24-port Ethernet switch for Power over Ethernet (PoE) applications which can send up to 30W per port for IEEE 802.3bt Type 3 applications and up to 60W per port for non-standard applications. Based on the MSP430F523x and MSPM0G1107x family, TI's (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00302 — Current Shunt Monitor with Transient Robustness Reference Design

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 (...)

Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00909 — 48V/10A High Frequency PWM 3-Phase GaN Inverter Reference Design for High-Speed Drives

Low voltage, high-speed drives and/or low inductance brushless motors require higher inverter switching frequencies in the range of 40 kHz to 100 kHz to minimize losses and torque ripple in the motor. The TIDA-00909 reference design achieves that by using a 3-phase inverter with three 80V/10A (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00913 — 48V 3-Phase Inverter with Shunt-based In-line Motor Phase Current Sensing Reference Design

The TIDA-00913 reference design realizes a 48V/10A 3-phase GaN inverter with precision in-line shunt-based phase current sensing for accurate control of precision drives such as servo drives. One of the largest challenges with in-line shunt-based phase current sensing is the high common-mode (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-01629 — 48V/500W Three-phase Inverter with Smart Gate Driver Reference Design for Servo Drives

Efficiency, protection, and integration are important design factors for compact DC-fed drives up to 60VDC. This reference design shows a three-phase inverter with nominal 48-V DC input and a 10-ARMS output current.  The 100-V intelligent three-phase gate driver DRV8350R with integrated buck (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDM-02007 — Dual-axis motor drive using fast current loop (FCL) and SFRA on a single MCU reference design

This reference design presents a dual-axis motor drive using fast current loop (FCL) and software frequency response analyzer (SFRA) technologies on a single C2000 controller. The FCL utilizes dual core (CPU, CLA) parallel processing techniques to achieve a substantial improvement in control (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-01598 — Low Side, High Bandwidth Current Amp and Fault Detection for Solar Inverters Reference Design

This reference design provides a solution for an accurate shunt-based current measurement on the low side with an integrated fault-detection feature. It consists of a current sense amplifier which supports current sensing for a high bandwidth. The fault detection feature allows detection of (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-01141 — Shunt-Based, <1% Accurate, ±100A, High-Side, Bi-directional Current Measurement Reference Design

This reference design is ±100-A shunt-based, high-side continuous bidirectional current measurement addressing applications such as battery current monitoring and current monitoring in UPS, telecom rectifiers and server PSUs. This design achieves high accuracy with low-shunt (...)
Design guide: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
SOIC (D) 8 Ultra Librarian
TSSOP (PW) 8 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos