INA254

AKTIV

Bidirektionaler Nulldrift-Strommessverstärker mit 80 V, ±75 A, PWM-Unterdrückung und int. Shunt-Wide

Produktdetails

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 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 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 mm × 6.4 mm)
  • 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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Technische Dokumentation

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Top-Dokumentation Typ Titel Format-Optionen Neueste englische Version herunterladen Datum
* Datenblatt INA254 80-V, High-Voltage, ±75-A Integrated Precision Shunt, Bidirectional, Zero-Drift Current-Shunt Monitor datasheet (Rev. A) PDF | HTML 30.03.2023
Anwendungshinweis Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers PDF | HTML 18.11.2024
Application brief Current Sensing in Collaborative and Industrial Robotic Arms (Rev. B) PDF | HTML 24.07.2023
Application brief Current Mode Control in Switching Power Supplies (Rev. E) PDF | HTML 12.04.2023
Application brief Current Sensing in an H-Bridge (Rev. D) PDF | HTML 07.04.2023
Application brief Switching Power Supply Current Measurements (Rev. E) PDF | HTML 07.04.2023
Application brief Integrating the Current Sensing Resistor (Rev. D) PDF | HTML 07.04.2023
Application brief Low-Drift, Precision, In-Line Motor Current Measurements With PWM Rejection (Rev. D) PDF | HTML 07.04.2023
Application brief High-Side Drive, High-Side Solenoid Monitor With PWM Rejection (Rev. D) PDF | HTML 15.08.2022
E-book An Engineer's Guide to Current Sensing (Rev. B) 12.04.2022
Technischer Artikel A key to accurate system thermal management: monitoring both current flow and temp PDF | HTML 04.10.2018
Application brief Low Temperature Drift Integrated Shunt vs Active Temp Compensation of Shunt 27.12.2017
Application brief Integrated-Resistor Current Sensors Simplify PCB Design 30.06.2017
Application brief Benefits of Intergated Low Inductive Shunt for PWM Applications 17.06.2017
Technischer Artikel Why should you care about overcurrent protection in your system? PDF | HTML 16.06.2016

Design und Entwicklung

Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.

Evaluierungsplatine

INA254EVM — INA254 Evaluierungsmodul für bidirektionale Nulldrift-Strommessverstärker mit 80 V

Der INA254EVM besteht aus einer Leiterplatte (PCB) mit einer Option zum Ausschneiden von drei einzelnen PCBs. Jeder PCB-Ausschnitt besteht aus dem INA254Ax-Baustein (wobei Ax für A1, A2 und A3 für durch drei teilbare Leiterplatten steht) sowie Testpunkten für externe Hardwareverbindungen.
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