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Current sense amplifiers analog output

INA240-Q1

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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

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 Automotive TI functional safety category Functional Safety-Capable Operating temperature range (C) -40 to 125, -40 to 150
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 Automotive TI functional safety category Functional Safety-Capable Operating temperature range (C) -40 to 125, -40 to 150
SOIC (D) 8 19 mm² 4.9 x 3.9 TSSOP (PW) 8 19 mm² 3 x 6.4
  • 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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Type Title Date
* 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 14 Dec 2021
Application note Precision Current Measurements on High-Voltage Power-Supply Rails (Rev. F) PDF | HTML 17 Oct 2022
Application note Current Mode Control in Switching Power Supplies (Rev. D) PDF | HTML 27 Sep 2022
Application note Current Sensing in an H-Bridge (Rev. C) PDF | HTML 15 Aug 2022
Application note High-Side Drive, High-Side Solenoid Monitor With PWM Rejection (Rev. D) PDF | HTML 15 Aug 2022
Application note Switching Power Supply Current Measurements (Rev. D) 15 Aug 2022
Application note 12-V Battery Monitoring in an Automotive Module (Rev. A) PDF | HTML 10 Mar 2022
Application note Integrating the Current Sensing Resistor (Rev. C) PDF | HTML 09 Mar 2022
Application note Using a PCB Copper Trace as a Current-Sense Shunt Resistor PDF | HTML 25 Jan 2022
Application note Low-Drift, Precision, In-Line Motor Current Measurements With PWM Rejection (Rev. C) PDF | HTML 28 Sep 2021
Selection guide Current Sense Amplifiers (Rev. E) 20 Sep 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) PDF | HTML 23 Feb 2021
Technical article How current-sense amplifiers monitor satellite health 08 Feb 2021
Application note Shunt-Based Current-Sensing Solutions for BMS Applications in HEVs and EVs (Rev. B) PDF | HTML 02 Feb 2021
Functional safety information INA240-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMEA (Rev. A) 23 Mar 2020
E-book Simplifying Current Sensing (Rev. A) 09 Jan 2020
Application note Evaluating Current Sensing Amplifiers in Body Control Modules Using Simulation 16 Dec 2019
Technical article Current-sensing dynamics in automotive solenoids 01 Nov 2019
Circuit design High-side, bidirectional current-sensing circuit with transient protection (Rev. A) 19 Feb 2019
Technical article A key to accurate system thermal management: monitoring both current flow and temperature 04 Oct 2018
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 note Low-Drift, Low-Side Current Measurements for Three-Phase Systems (Rev. B) 05 Sep 2017
EVM User's 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
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
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Simulation model

INA240 PSpice Model

SBOMB42.ZIP (48 KB) - PSpice Model
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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
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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
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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

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 (...)
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Calculation tool

Current Sense Amplifier Comparison and Error Tool (Rev. E)

SBOR020E.ZIP (592 KB)
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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 (...)
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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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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 (...)
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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
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Reference designs

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 (...)
Design guide: PDF
Schematic: PDF
Reference designs

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 (...)
Design guide: PDF
Schematic: PDF
Reference designs

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  (...)
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
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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