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INA240

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

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

INA240

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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
More literature Ein Techniker-Leitfaden für Industrieroboter-Designs Mar. 25, 2020
More literature 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 (...)
View details
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
View details
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
View details

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

REFERENCE DESIGNS Download
Distributed multi-axis servo drive over fast serial interface (FSI) reference design
TIDM-02006 — This design presents an example distributed multi-axis servo drive over Fast Serial Interface (FSI) using C2000™ real-time controllers. Multi-axis servo drives are used in many applications such as factory automation and robots. The cost per axis, performance and ease of use are always high (...)
document-generic Schematic document-generic User guide
Design files
View details
REFERENCE DESIGNS Download
Dual-axis motor drive using fast current loop (FCL) and SFRA on a single MCU reference design
TIDM-02007 — 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 (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
MPPT charge controller reference design for 12-V, 24-V and 48-V solar panels
TIDA-010042 — This reference design is a Maximum Power Point Tracking (MPPT) solar charge controller for 12-V and 24-V solar panels. This compact reference design targets small and medium power solar charger solutions and is capable of operating with 15- to 60-V solar panel modules, 12- or 24-V batteries and (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
24-port (PoE 2, 4-pair) power sourcing equipment reference design for multi-port applications
TIDA-050026-23881 — 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 family, our (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
24-port (PoE 2, 2-pair) power sourcing equipment reference design for multi-port applications
TIDA-050026-23882 — 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 family, TI's TPS2388x FirmPSE (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
48V/500W Three-phase Inverter with Smart Gate Driver Reference Design for Servo Drives
TIDA-01629 — 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 (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Low Side, High Bandwidth Current Amp and Fault Detection for Solar Inverters Reference Design
TIDA-01598 — 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 (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
48V 3-Phase Inverter with Shunt-based In-line Motor Phase Current Sensing Reference Design
TIDA-00913 — 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 voltage (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
2kW, 48V to 400V, >93% Efficiency, Isolated Bidirectional DC-DC Converter Reference Design for UPS
TIDA-00951 — The 2-kW isolated bidirectional DC-DC converter reference design (TIDA-00951) is capable of power transfer between a 400-V DC-BUS and a 12-14 cell lithium battery pack for use in UPS, battery backup and power storage applications. This reference design works as active clamped boost converter with (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Automotive, mA-to-kA Range, Current Shunt Sensor Reference Design
TIDA-03050 — 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 (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Automotive Shunt-Based ±500A Precision Current Sensing Reference Design
TIDA-03040 — This shunt-based current sensor reference design provides an accuracy of < 0.2% FSR over a temperature range of -40°C to +125°C. Precision current sensing is essential in a number of automotive applications, including battery management systems, motor currents, and others. Generally (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
48V/10A High Frequency PWM 3-Phase GaN Inverter Reference Design for High-Speed Drives
TIDA-00909 — 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 (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Shunt-Based, <1% Accurate, ±100A, High-Side, Bi-directional Current Measurement Reference Design
TIDA-01141 — The TIDA-01141 TI design provides a reference solution for ±100A shunt-based, high-side continuous bi-directional current measurement addressing applications such as battery current monitoring and current monitoring in UPS, Telecom Rectifiers and Server PSUs. This design achieves high (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

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SOIC (D) 8 View options
TSSOP (PW) 8 View options

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Training series

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Videos

Over Current Sensing Techniques

Watch this webinar recording to learn more about the over-current protection (OCP). This webinar was brought to you in cooperation with Farnell element 14. 

Posted: 19-Jan-2016
Duration: 07:00

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