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Analog current-sense amplifiers with integrated shunt resistor

INA254

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80-V, bidirectional ±75-A zero-drift current-sense amplifier with PWM rejection and shunt resistor

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Data sheet

INA254

ACTIVE
Data sheet Order now

Product details

Common-mode voltage (max) (V) 80 Common-mode voltage (min) (V) -4 Input offset (±) (max) (µV) 62.5, 62500 Gain error (%) 0.5 Gain error drift (±) (max) (ppm/°C) 45 CMRR (min) (dB) 120 Bandwidth (kHz) 350 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 2.7 Iq (max) (mA) 2.4 Features Bidirectional, Enhanced PWM Rejection, Integrated Shunt, Low-side Capable Rating Catalog Operating temperature range (°C) -40 to 125
Common-mode voltage (max) (V) 80 Common-mode voltage (min) (V) -4 Input offset (±) (max) (µV) 62.5, 62500 Gain error (%) 0.5 Gain error drift (±) (max) (ppm/°C) 45 CMRR (min) (dB) 120 Bandwidth (kHz) 350 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 2.7 Iq (max) (mA) 2.4 Features Bidirectional, Enhanced PWM Rejection, Integrated Shunt, Low-side Capable Rating Catalog Operating temperature range (°C) -40 to 125
HTSSOP (PWA) 24 62.08 mm² 9.7 x 6.4
  • Precision integrated 400-µΩ shunt resistor
    • Continuous ±75 A at 25°C
    • Continuous ±50 A from –40°C to +85°C
    • Shunt resistor tolerance: 0.5% (maximum)
    • Low drift: 10 ppm/°C (0°C to 125°C)
    • Low inductance: 2 nH
  • High accuracy
    • System gain error: 0.5% (maximum)
    • System gain drift: 45 ppm/°C (maximum)
    • Input offset current: ±62.5 mA (maximum)
    • Input offset drift: 625 µA/°C (maximum)
    • DC CMRR > 120-dB
    • 90-dB AC CMRR at 50 kHz
  • Enhanced PWM rejection
  • Wide common-mode range: –4 V to +80 V
  • Available gains: 20 mV/A, 40 mV/A, and 75 mV/A
  • Precision integrated 400-µΩ shunt resistor
    • Continuous ±75 A at 25°C
    • Continuous ±50 A from –40°C to +85°C
    • Shunt resistor tolerance: 0.5% (maximum)
    • Low drift: 10 ppm/°C (0°C to 125°C)
    • Low inductance: 2 nH
  • High accuracy
    • System gain error: 0.5% (maximum)
    • System gain drift: 45 ppm/°C (maximum)
    • Input offset current: ±62.5 mA (maximum)
    • Input offset drift: 625 µA/°C (maximum)
    • DC CMRR > 120-dB
    • 90-dB AC CMRR at 50 kHz
  • Enhanced PWM rejection
  • Wide common-mode range: –4 V to +80 V
  • Available gains: 20 mV/A, 40 mV/A, and 75 mV/A

The INA254 is a voltage-output, current sense amplifier with a 400-µΩ integrated shunt resistor. The INA254 is designed to monitor bidirectional currents over a wide common-mode range from –4 V to +80 V, independent of the supply voltage. Three fixed gains are available: 20 mV/A, 40 mV/A, and 75 mV/A. The integration of the precision resistor with a zero-drift chopped amplifier provides calibration equivalent measurement accuracy, ultra-low temperature drift performance of ±45 ppm/°C (maximum), and an optimized Kelvin layout for the sensing resistor.

The INA254 is designed with enhanced PWM rejection circuitry to suppress large (dv/dt) signals that enable real-time continuous current measurements. The measurements are critical for in-line current measurements in a motor-drive application, and for solenoid valve control applications.

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. All gain versions are specified over the extended operating temperature range (–40°C to +125°C), and are available in a 24-pin HTSSOP package.

The INA254 is a voltage-output, current sense amplifier with a 400-µΩ integrated shunt resistor. The INA254 is designed to monitor bidirectional currents over a wide common-mode range from –4 V to +80 V, independent of the supply voltage. Three fixed gains are available: 20 mV/A, 40 mV/A, and 75 mV/A. The integration of the precision resistor with a zero-drift chopped amplifier provides calibration equivalent measurement accuracy, ultra-low temperature drift performance of ±45 ppm/°C (maximum), and an optimized Kelvin layout for the sensing resistor.

The INA254 is designed with enhanced PWM rejection circuitry to suppress large (dv/dt) signals that enable real-time continuous current measurements. The measurements are critical for in-line current measurements in a motor-drive application, and for solenoid valve control applications.

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. All gain versions are specified over the extended operating temperature range (–40°C to +125°C), and are available in a 24-pin HTSSOP package.
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* Data sheet INA254 80-V, High-Voltage, ±75-A Integrated Precision Shunt, Bidirectional, Zero-Drift Current-Shunt Monitor datasheet (Rev. A) PDF | HTML 30 Mar 2023
Application note Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers PDF | HTML 18 Nov 2024
Application brief Current Sensing in Collaborative and Industrial Robotic Arms (Rev. B) PDF | HTML 24 Jul 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 Integrating the Current Sensing Resistor (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 High-Side Drive, High-Side Solenoid Monitor With PWM Rejection (Rev. D) PDF | HTML 15 Aug 2022
E-book An Engineer's Guide to Current Sensing (Rev. B) 12 Apr 2022
Technical article A key to accurate system thermal management: monitoring both current flow and temp PDF | HTML 04 Oct 2018
Application brief Low Temperature Drift Integrated Shunt vs Active Temp Compensation of Shunt 27 Dec 2017
Application brief Integrated-Resistor Current Sensors Simplify PCB Design 30 Jun 2017
Application brief Benefits of Intergated Low Inductive Shunt for PWM Applications 17 Jun 2017
Technical article Why should you care about overcurrent protection in your system? PDF | HTML 16 Jun 2016

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Evaluation board

INA254EVM — INA254 evaluation module for 80-V bidirectional zero-drift current-sense amplifier

The INA254EVM consists of one printed circuit board (PCB) with an option to cut out three individual PCBs. Each PCB cutout consists of the INA254Ax device (where Ax is A1, A2 and A3 for boards one through three) as well as test points for external hardware connections.
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