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Amplificadores de detección de corriente
Monitores de potencia digitales

INA234

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Monitor de corriente, tensión y potencia de salida I2C de 28 V y 12 bits con alerta en WCSP

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INA234

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Detalles del producto

Common-mode voltage (max) (V) 28 Common-mode voltage (min) (V) -0.3 Digital interface I2C Resolution (Bits) 12 Input offset (±) (max) (µV) 100 Input offset drift (±) (max) (µV/°C) 0.5 Voltage gain (V/V) 1 CMRR (min) (dB) 100 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 1.7 Iq (max) (mA) 0.5 Gain error (%) 0.5 Gain error drift (±) (max) (ppm/°C) 50 Features Alert Function, Bidirectional, Integrated Power Monitor, Low-side Capable Number of channels 1 Power measurement accuracy (%) 1 Rating Catalog Operating temperature range (°C) -40 to 125
Common-mode voltage (max) (V) 28 Common-mode voltage (min) (V) -0.3 Digital interface I2C Resolution (Bits) 12 Input offset (±) (max) (µV) 100 Input offset drift (±) (max) (µV/°C) 0.5 Voltage gain (V/V) 1 CMRR (min) (dB) 100 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 1.7 Iq (max) (mA) 0.5 Gain error (%) 0.5 Gain error drift (±) (max) (ppm/°C) 50 Features Alert Function, Bidirectional, Integrated Power Monitor, Low-side Capable Number of channels 1 Power measurement accuracy (%) 1 Rating Catalog Operating temperature range (°C) -40 to 125
DSBGA (YBJ) 8 0.2316 mm² 1.2 x 0.193
  • High-side or low-side current sensing
  • Operates from a 1.7V to 5.5V power supply
  • Reports current, voltage and power
  • Programmable full scale range: 20mV / 80mV
  • Input common mode range: –0.3V to 28V
  • Current monitoring accuracy:
    • 12-bit ADC resolution
    • 0.5% gain error (maximum)
    • 100µV offset (maximum)
  • Low input bias current: 10nA (maximum)
  • Configurable averaging options
  • General call addressing allows conversion synchronization among devices
  • Alert limits for over and under current events
  • 1.2V compliant I2C, SMBus interface
  • Two device address options with a 4-pin selectable address
  • DSBGA-8 Package (0.745mm × 1.508mm)
  • Operating temperature: –40°C and +125°C
  • High-side or low-side current sensing
  • Operates from a 1.7V to 5.5V power supply
  • Reports current, voltage and power
  • Programmable full scale range: 20mV / 80mV
  • Input common mode range: –0.3V to 28V
  • Current monitoring accuracy:
    • 12-bit ADC resolution
    • 0.5% gain error (maximum)
    • 100µV offset (maximum)
  • Low input bias current: 10nA (maximum)
  • Configurable averaging options
  • General call addressing allows conversion synchronization among devices
  • Alert limits for over and under current events
  • 1.2V compliant I2C, SMBus interface
  • Two device address options with a 4-pin selectable address
  • DSBGA-8 Package (0.745mm × 1.508mm)
  • Operating temperature: –40°C and +125°C

The INA234 device is a 12-bit digital current monitor with an I2C/SMBus-compatible interface that is compliant with a wide range of digital bus voltages such as 1.2V, 1.8V, 3.3V, and 5V. The device monitors the voltage across an external sense resistor and reports values for current, bus voltage, and power.

The INA234 features programmable ADC conversion times and averaging. The device also has a programmable calibration value with an internal multiplier that enables direct readouts of current in amperes and power in watts. The device monitors the bus voltage present on the IN– pin and can alert on overcurrent and undercurrent conditions as well as overvoltage and undervoltage conditions. High input impedance while in current measurement mode allows use of larger current sense resistors needed to measure small value system currents.

The INA234 senses current on common-mode bus voltages that can vary from –0.3V to 28V, independent of the supply voltage. The device operates from a single 1.7V to 5.5V supply, drawing a typical supply current of 300µA in normal operation. The device can be placed in a low-power standby mode where the typical operating current is 2.2µA.

The INA234 device is a 12-bit digital current monitor with an I2C/SMBus-compatible interface that is compliant with a wide range of digital bus voltages such as 1.2V, 1.8V, 3.3V, and 5V. The device monitors the voltage across an external sense resistor and reports values for current, bus voltage, and power.

The INA234 features programmable ADC conversion times and averaging. The device also has a programmable calibration value with an internal multiplier that enables direct readouts of current in amperes and power in watts. The device monitors the bus voltage present on the IN– pin and can alert on overcurrent and undercurrent conditions as well as overvoltage and undervoltage conditions. High input impedance while in current measurement mode allows use of larger current sense resistors needed to measure small value system currents.

The INA234 senses current on common-mode bus voltages that can vary from –0.3V to 28V, independent of the supply voltage. The device operates from a single 1.7V to 5.5V supply, drawing a typical supply current of 300µA in normal operation. The device can be placed in a low-power standby mode where the typical operating current is 2.2µA.
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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Fecha
* Data sheet INA234 28V , 12-Bit , Current, Voltage, and Power Monitor With an I2 C Interface datasheet (Rev. D) PDF | HTML 27 ago 2025
Application note Aliasing and Prevention in Some Capacitively Coupled Current Sense Amplifiers PDF | HTML 06 nov 2025
Application note Closed Loop Constant Power Drive to Simplify Heater Element Control and Extend Battery Life PDF | HTML 29 ene 2025
Application note Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers PDF | HTML 18 nov 2024
Application note Using a PCB Copper Trace as a Current-Sense Shunt Resistor PDF | HTML 25 ene 2022
Application note Digital Interfaces for Current Sensing Devices (Rev. A) PDF | HTML 30 sep 2021
Application brief Integrating the Current Sensing Signal Path (Rev. B) PDF | HTML 29 sep 2021
Application brief Integrated, Current Sensing Analog-to-Digital Converter (Rev. A) PDF | HTML 28 sep 2021
Application note Getting Started with Digital Power Monitors (Rev. A) PDF | HTML 02 sep 2021
Application note Understanding the I2C Bus PDF | HTML 30 jun 2015

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

INA234_236EVM — Módulo de evaluación INA232, INA234 e INA236 para monitores de corriente/tensión/potencia.

Este módulo de evaluación (EVM) es una plataforma fácil de usar para evaluar las funciones principales y el rendimiento de INA232, INA234 o INA236. El EVM dispone de una interfaz gráfica de usuario para leer y escribir registros de dispositivo.
Guía del usuario: PDF | HTML
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IDE, configuración, compilador o depurador

ASC-STUDIO-INA234 — ASC Studio (SysConfig) for configuring all aspects of the INA234 digital power monitor

SysConfig can be used to help simplify configuration challenges and accelerate software development with the INA234 digital power monitor.
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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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SBOR021 — Power Monitor Tool

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Encapsulado Pines Símbolos CAD, huellas y modelos 3D
DSBGA (YBJ) 8 Ultra Librarian
Se aplican los Términos y condiciones estándar de TI para los elementos de evaluación.

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

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