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Monitores de potencia digitales

INA229

ACTIVO

Monitor de corriente/tensión/potencia/energía/carga de salida SPI ultrapreciso de 85 V y 20 bits

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INA229

ACTIVO
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Detalles del producto

Common-mode voltage (max) (V) 85 Common-mode voltage (min) (V) -0.3 Digital interface SPI Resolution (Bits) 20 Input offset (±) (max) (µV) 1 Input offset drift (±) (max) (µV/°C) 0.01 Input offset drift (±) (typ) (µV/°C) 0.002 Voltage gain (V/V) 1 CMRR (min) (dB) 154 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 2.7 Iq (max) (mA) 1.1 Gain error (%) 0.05 Gain error drift (±) (max) (ppm/°C) 20 Features Alert Function, Bidirectional, Digital Temp Monitor, Integrated Power Accumulator, Integrated Power Monitor, Low-side Capable, SPI, Ultra precise Number of channels 1 Power measurement accuracy (%) 0.1 Rating Catalog Operating temperature range (°C) -40 to 125
Common-mode voltage (max) (V) 85 Common-mode voltage (min) (V) -0.3 Digital interface SPI Resolution (Bits) 20 Input offset (±) (max) (µV) 1 Input offset drift (±) (max) (µV/°C) 0.01 Input offset drift (±) (typ) (µV/°C) 0.002 Voltage gain (V/V) 1 CMRR (min) (dB) 154 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 2.7 Iq (max) (mA) 1.1 Gain error (%) 0.05 Gain error drift (±) (max) (ppm/°C) 20 Features Alert Function, Bidirectional, Digital Temp Monitor, Integrated Power Accumulator, Integrated Power Monitor, Low-side Capable, SPI, Ultra precise Number of channels 1 Power measurement accuracy (%) 0.1 Rating Catalog Operating temperature range (°C) -40 to 125
VSSOP (DGS) 10 14.7 mm² 3 x 4.9
  • High-resolution, 20-bit delta-sigma ADC
  • Current monitoring accuracy:
    • Offset voltage: ±1 µV (maximum)
    • Offset drift: ±0.01 µV/°C (maximum)
    • Gain error: ±0.05% (maximum)
    • Gain error drift: ±20 ppm/°C (maximum)
    • Common mode rejection: 154 dB (minimum)
  • Power monitoring accuracy:
    • 0.5% full scale, –40°C to +125°C (maximum)
  • Energy and charge accuracy:
    • 1.0% full scale (maximum)
  • Fast alert response: 75 µs
  • Wide common-mode range: –0.3 V to +85 V
  • Bus voltage sense input: 0 V to 85 V
  • Shunt full-scale differential range: ±163.84 mV / ±40.96 mV
  • Input bias current: 2.5 nA (maximum)
  • Temperature sensor: ±1°C (maximum at 25°C)
  • Programmable resistor temperature compensation
  • Programmable conversion time and averaging
  • 10-MHz SPI communication interface
  • Operates from a 2.7-V to 5.5-V supply:
    • Operational current: 640 µA (typical)
    • Shutdown current: 5 µA (maximum)
  • High-resolution, 20-bit delta-sigma ADC
  • Current monitoring accuracy:
    • Offset voltage: ±1 µV (maximum)
    • Offset drift: ±0.01 µV/°C (maximum)
    • Gain error: ±0.05% (maximum)
    • Gain error drift: ±20 ppm/°C (maximum)
    • Common mode rejection: 154 dB (minimum)
  • Power monitoring accuracy:
    • 0.5% full scale, –40°C to +125°C (maximum)
  • Energy and charge accuracy:
    • 1.0% full scale (maximum)
  • Fast alert response: 75 µs
  • Wide common-mode range: –0.3 V to +85 V
  • Bus voltage sense input: 0 V to 85 V
  • Shunt full-scale differential range: ±163.84 mV / ±40.96 mV
  • Input bias current: 2.5 nA (maximum)
  • Temperature sensor: ±1°C (maximum at 25°C)
  • Programmable resistor temperature compensation
  • Programmable conversion time and averaging
  • 10-MHz SPI communication interface
  • Operates from a 2.7-V to 5.5-V supply:
    • Operational current: 640 µA (typical)
    • Shutdown current: 5 µA (maximum)

The INA229 is an ultra-precise digital power monitor with a 20-bit delta-sigma ADC specifically designed for current-sensing applications. The device can measure a full-scale differential input of ±163.84 mV or ±40.96 mV across a resistive shunt sense element with common-mode voltage support from –0.3 V to +85 V.

The INA229 reports current, bus voltage, 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 ±1°C accurate for die temperature measurement and is useful in monitoring the system ambient temperature.

The low offset and gain drift design of the INA229 allows the device to be used in precise systems that do not undergo multi-temperature calibration during manufacturing. Further, the very low offset voltage and noise allow for use in mA to kA sensing applications and provide a wide dynamic range without significant power dissipation losses on the sensing shunt element. The low input bias current of the device permits the use of larger current-sense resistors, thus providing accurate current measurements in the micro-amp range.

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

The INA229 is an ultra-precise digital power monitor with a 20-bit delta-sigma ADC specifically designed for current-sensing applications. The device can measure a full-scale differential input of ±163.84 mV or ±40.96 mV across a resistive shunt sense element with common-mode voltage support from –0.3 V to +85 V.

The INA229 reports current, bus voltage, 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 ±1°C accurate for die temperature measurement and is useful in monitoring the system ambient temperature.

The low offset and gain drift design of the INA229 allows the device to be used in precise systems that do not undergo multi-temperature calibration during manufacturing. Further, the very low offset voltage and noise allow for use in mA to kA sensing applications and provide a wide dynamic range without significant power dissipation losses on the sensing shunt element. The low input bias current of the device permits the use of larger current-sense resistors, thus providing accurate current measurements in the micro-amp range.

The device allows for selectable ADC conversion times from 50 µs to 4.12 ms 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 INA229 85-V, 20-Bit, Ultra-Precise Power/Energy/Charge Monitor With SPI Interface datasheet (Rev. A) PDF | HTML 11 may 2022
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
Certificate INA229EVM EU RoHS Declaration of Conformity (DoC) (Rev. A) 16 dic 2020
Application brief Energy and Power Monitoring with Digital Current Sensors 25 may 2017

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

INA229_239EVM — Módulo de evaluación INA229 y INA239

Este módulo de evaluación (EVM) es una plataforma fácil de usar para evaluar las funciones principales y el rendimiento de INA229 o INA239.

La EVM es compatible con mediciones de corriente de hasta 10 A e incorpora una interfaz gráfica de usuario (GUI) para leer y escribir en los registros del (...)

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

ASC-STUDIO-INA229 — ASC studio (SysConfig) for configuring all aspects of the INA229 current sensor

SysConfig can be used to help simplify configuration challenges and accelerate software development with the INA229 current sensor.
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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

Power Monitor Tool
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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 (...)
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Encapsulado Pines Símbolos CAD, huellas y modelos 3D
VSSOP (DGS) 10 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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