Inicio Amplificadores Amplificadores de detección de corriente Amplificadores analógicos de detección de corriente con resistencia de derivación integrada

INA254

ACTIVO

Amplificador de detección de corriente bidireccional de deriva cero, 80 V y ±75 A con rechazo PWM y

Detalles del producto

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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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Fecha
* 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 abr 2023
Application brief Current Sensing in an H-Bridge (Rev. D) PDF | HTML 07 abr 2023
Application brief Integrating the Current Sensing Resistor (Rev. D) PDF | HTML 07 abr 2023
Application brief Low-Drift, Precision, In-Line Motor Current Measurements With PWM Rejection (Rev. D) PDF | HTML 07 abr 2023
Application brief Switching Power Supply Current Measurements (Rev. E) PDF | HTML 07 abr 2023
Application brief High-Side Drive, High-Side Solenoid Monitor With PWM Rejection (Rev. D) PDF | HTML 15 ago 2022
E-book An Engineer's Guide to Current Sensing (Rev. B) 12 abr 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 dic 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

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Placa de evaluación

INA254EVM — Módulo de evaluación INA254 para amplificador de detección de corriente bidireccionales de 80 V y

El INA254EVM consta de una placa de circuito impreso (PCB) con la opción de recortar tres PCB individuales. Cada recorte de PCB consta del dispositivo INA254Ax (donde Ax es A1, A2 y A3 para las placas uno a tres), así como puntos de prueba para conexiones de hardware externo.
Guía del usuario: PDF | HTML
Herramienta de cálculo

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 (...)

Productos y hardware compatibles

Productos y hardware compatibles

Herramienta de simulación

PSPICE-FOR-TI — PSpice® para herramienta de diseño y simulación de TI

PSpice® para TI es un entorno de diseño y simulación que ayuda a evaluar la funcionalidad de los circuitos analógicos. Esta completa suite de diseño y simulación utiliza un motor de análisis analógico de Cadence®. Disponible sin ningún costo, PSpice para TI incluye una de las bibliotecas de modelos (...)
Herramienta de simulación

TINA-TI — Programa de simulación analógica basado en SPICE

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 (...)
Guía del usuario: PDF
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
HTSSOP (PWA) 24 Ultra Librarian

Pedidos y calidad

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL)/reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

Soporte y capacitación

Foros de TI E2E™ con asistencia técnica de los ingenieros de TI

El contenido lo proporcionan “tal como está” TI y los colaboradores de la comunidad y no constituye especificaciones de TI. Consulte los términos de uso.

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