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INA240-Q1

ACTIVE

AEC-Q100, -4 to 80V, bi-directional, ultra-precise current sense amplifier w/ enhanced pwm rejection

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Data sheet

INA240-Q1

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 Automotive Voltage gain (V/V) 20, 50, 100, 200 CMRR (min) (dB) 120 Bandwidth (kHz) 400 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 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 150
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 Automotive Voltage gain (V/V) 20, 50, 100, 200 CMRR (min) (dB) 120 Bandwidth (kHz) 400 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 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 150
TSSOP (PW) 8 19.2 mm² (3 mm × 6.4 mm) SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm)
  • 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
  • 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

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.

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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* Data sheet INA240-Q1 AEC-Q100, –4-V to 80-V, Bidirectional, Ultra-Precise Current Sense Amplifier With Enhanced PWM Rejection datasheet (Rev. E) PDF | HTML Dec 14, 2021
Application note Using a PCB Copper Trace as a Current Sense Shunt Resistor (Rev. A) PDF | HTML Apr 27, 2026
Application note Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers PDF | HTML Nov 18, 2024
Application brief Current Mode Control in Switching Power Supplies (Rev. E) PDF | HTML Apr 12, 2023
Application brief Low-Drift, Precision, In-Line Motor Current Measurements With PWM Rejection (Rev. D) PDF | HTML Apr 7, 2023
Application brief Current Sensing in an H-Bridge (Rev. D) PDF | HTML Apr 7, 2023
Application brief Switching Power Supply Current Measurements (Rev. E) PDF | HTML Apr 7, 2023
Application brief Integrating the Current Sensing Resistor (Rev. D) PDF | HTML Apr 7, 2023
Application brief Precision Current Measurements on High-Voltage Power-Supply Rails (Rev. F) PDF | HTML Oct 17, 2022
Application brief High-Side Drive, High-Side Solenoid Monitor With PWM Rejection (Rev. D) PDF | HTML Aug 15, 2022
E-book An Engineer's Guide to Current Sensing (Rev. B) Apr 12, 2022
Application brief 12-V Battery Monitoring in an Automotive Module (Rev. A) PDF | HTML Mar 10, 2022
Selection guide Current Sense Amplifiers (Rev. E) Sep 20, 2021
Technical article Solving the multidecade current-measurement challenge in your 48-V BMS application PDF | HTML Jun 14, 2021
Application brief High-Side Motor Current Monitoring for Over-Current Protection (Rev. B) PDF | HTML Feb 23, 2021
Application brief Shunt-Based Current-Sensing Solutions for BMS Applications in HEVs and EVs (Rev. B) PDF | HTML Feb 2, 2021
Functional safety information INA240-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMEA (Rev. A) Mar 23, 2020
Application note Evaluating Current Sensing Amplifiers in Body Control Modules Using Simulation Dec 16, 2019
Technical article Current-sensing dynamics in automotive solenoids PDF | HTML Nov 1, 2019
Circuit design High-Side, Bidirectional Current-Sensing Circuit with Transient Protection (Rev. A) PDF | HTML Feb 1, 2019
Analog design Journal Second-sourcing options for small-package amplifiers Mar 26, 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 6, 2018
Application brief Low-Drift, Low-Side Current Measurements for Three-Phase Systems (Rev. B) Sep 5, 2017
Technical article Understanding current sensing in HEV/EV batteries PDF | HTML Aug 2, 2017
Application brief Benefits of Intergated Low Inductive Shunt for PWM Applications Jun 17, 2017
Application brief Precision LED Brightness and Color Mixing With Discrete Current Sense Amplifiers Feb 28, 2017
Technical article Gallium nitride transistors open up new frontiers in high-speed motor drives PDF | HTML Dec 12, 2016
Technical article Five benefits of enhanced PWM rejection for in-line motor control PDF | HTML Nov 8, 2016
Application note Current Sensing for Inline Motor-Control Applications Oct 20, 2016
Technical article Precision current measurement enhances electronic power-steering systems PDF | HTML Sep 19, 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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Simulation model

INA240 PSpice Model

SBOMB42.ZIP (48 KB) - PSpice model
Supported products & hardware
Simulation model

INA240 TINA-TI Reference Design (Rev. A)

SBOMAC8A.TSC (440 KB) - TINA-TI reference design
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Simulation model

INA240 TINA-TI Spice Model (Rev. A)

SBOMAC7A.ZIP (28 KB) - TINA-TI Spice model
Supported products & hardware
Simulation model

INA240A1 PSpice Model

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

INA240A2 PSpice Model

SBOMBG4.ZIP (23 KB) - PSpice model
Supported products & hardware
Simulation model

INA240A3 PSpice Model

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

INA240A4 PSpice Model

SBOMBG5.ZIP (25 KB) - PSpice model
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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 (...)

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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
Reference design

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 (...)

Supported products & hardware
Reference design

TIDA-01421 — Automotive Brushed-Motor Ripple Counter Reference Design for Sensorless Position Measurement

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 (...)
Supported products & hardware
Reference design

TIDA-01506 — Reference Design for Automotive, Proportional-Solenoid Current Sensor

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  (...)
Supported products & hardware
Reference design

TIDA-03050 — Automotive, mA-to-kA Range, Current Shunt Sensor Reference Design

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 (...)
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TSSOP (PW) 8 Ultra Librarian
SOIC (D) 8 Ultra Librarian
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