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Monitores de potencia digitales con resistencia de derivación integrada
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INA745A

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Monitor de potencia dig. de salida I²C, alta prec., 40 V y 16 bits con tecnología EZShunt™ de 800 μΩ

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INA745A

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Detalles del producto

Common-mode voltage (max) (V) 40 Common-mode voltage (min) (V) -0.1 Continuous current (max) (A) 35 Input offset current (±) (max) (mA) 6.25 Input offset current drift (±) (typ) (µA/°C) 5 Gain error (%) 0.1 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 2.7 Iq (max) (mA) 1 Digital interface I2C Resolution (Bits) 16 Features Alert Function, Bidirectional, Digital Temp Monitor, High precision, Integrated Power Monitor, Integrated Shunt, Low-side Capable Rating Catalog Operating temperature range (°C) -40 to 125
Common-mode voltage (max) (V) 40 Common-mode voltage (min) (V) -0.1 Continuous current (max) (A) 35 Input offset current (±) (max) (mA) 6.25 Input offset current drift (±) (typ) (µA/°C) 5 Gain error (%) 0.1 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 2.7 Iq (max) (mA) 1 Digital interface I2C Resolution (Bits) 16 Features Alert Function, Bidirectional, Digital Temp Monitor, High precision, Integrated Power Monitor, Integrated Shunt, Low-side Capable Rating Catalog Operating temperature range (°C) -40 to 125
VQFN (REL) 14 15 mm² 5 x 3
  • Low loss integrated shunt resistor
    • Internal resistance: 800µΩ, TA = 25°C
    • Continuous current: ±35A, TA = 25°C
    • Peak measurement capability: ±39.32A
  • Current monitoring accuracy: A/B Grade (maximum)
    • Offset current: ±6.25mA / ±62.5mA
    • Offset drift: ±30µA/°C (A and B Grades)
    • System gain error: ±0.75% / ±1.25%
    • Common-mode rejection: ±0.125 / ±1.25mA/V
  • Power monitoring accuracy: A/B Grade, (maximum)
    • ±0.9% / ±1.6% at 25°C, full scale
  • Energy and charge accuracy: A/B Grade, (maximum)
    • ±1.4% / ±2.1% at 25°C, full scale
  • Temperature sensor: ±1.5°C (maximum at 25°C)
  • Precision oscillator: ±0.5% (maximum at 25°C)
  • Programmable conversion time and averaging
  • 2.94MHz high-speed I2C interface with 16 pin-selectable addresses
  • Operates from a 2.7V to 5.5V supply:
    • Operational current: 640µA (typical)
    • Shutdown current: 5µA (maximum)
  • Low loss integrated shunt resistor
    • Internal resistance: 800µΩ, TA = 25°C
    • Continuous current: ±35A, TA = 25°C
    • Peak measurement capability: ±39.32A
  • Current monitoring accuracy: A/B Grade (maximum)
    • Offset current: ±6.25mA / ±62.5mA
    • Offset drift: ±30µA/°C (A and B Grades)
    • System gain error: ±0.75% / ±1.25%
    • Common-mode rejection: ±0.125 / ±1.25mA/V
  • Power monitoring accuracy: A/B Grade, (maximum)
    • ±0.9% / ±1.6% at 25°C, full scale
  • Energy and charge accuracy: A/B Grade, (maximum)
    • ±1.4% / ±2.1% at 25°C, full scale
  • Temperature sensor: ±1.5°C (maximum at 25°C)
  • Precision oscillator: ±0.5% (maximum at 25°C)
  • Programmable conversion time and averaging
  • 2.94MHz high-speed I2C interface with 16 pin-selectable addresses
  • Operates from a 2.7V to 5.5V supply:
    • Operational current: 640µA (typical)
    • Shutdown current: 5µA (maximum)

The INA745x is a digital power monitor with an integrated current sensing element along with a 16-bit delta-sigma ADC specifically designed for current-sensing applications. The device can measure full-scale currents up to ±39.32A with common-mode voltage support from –0.1V to +40V.

The INA745x reports current, bus voltage, die temperature, power, energy and charge accumulation while employing a precision ±0.5% integrated oscillator, all while performing the needed calculations in the background. The integrated temperature sensor is ±2.5°C accurate over the junction temperature range.

The low offset and gain drift design of the INA745x allows the device to be used in precise systems that do not undergo multi-temperature calibration during manufacturing.

The device allows for selectable ADC conversion times from 50µs to 4.12ms as well as sample averaging from 1x to 1024x, which further helps reduce the noise of the measured data.

The INA745x is a digital power monitor with an integrated current sensing element along with a 16-bit delta-sigma ADC specifically designed for current-sensing applications. The device can measure full-scale currents up to ±39.32A with common-mode voltage support from –0.1V to +40V.

The INA745x reports current, bus voltage, die temperature, power, energy and charge accumulation while employing a precision ±0.5% integrated oscillator, all while performing the needed calculations in the background. The integrated temperature sensor is ±2.5°C accurate over the junction temperature range.

The low offset and gain drift design of the INA745x allows the device to be used in precise systems that do not undergo multi-temperature calibration during manufacturing.

The device allows for selectable ADC conversion times from 50µs to 4.12ms as well as sample averaging from 1x to 1024x, which further helps reduce the noise of the measured data.
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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Fecha
* Data sheet INA745x 40V , 16 -Bit, Precision I2C Output Digital Power Monitor With EZShunt Technology datasheet (Rev. B) PDF | HTML 22 ago 2025
Application note Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers PDF | HTML 18 nov 2024
Application note How EZShunt Technology Simplifies and Reduces Error in Shunt-Based Designs PDF | HTML 27 jun 2024

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

INA745-INA746EVM — Módulo de evaluación INA745 e INA746 para EZShunt™ Digital Power Monitor con resistencia de derivaci

El módulo de evaluación (EVM) INA745-IN746 es una plataforma compacta para evaluar las principales características y el rendimiento de los monitores de alimentación digitales de alta precisión INA745A, INA745B o INA746 con tecnología EZShunt™ en rangos especificados de corriente de entrada, tensión (...)

Guía del usuario: PDF | HTML
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IDE, configuración, compilador o depurador

ASC-STUDIO-INA745 — ASC Studio (SysConfig) for configuring all aspects of the INA745 current sensor

SysConfig can be used to help simplify configuration challenges and accelerate software development with the INA745 current sensor.
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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 (...)
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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 (...)
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Encapsulado Pines Símbolos CAD, huellas y modelos 3D
VQFN (REL) 14 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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