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INA232

ACTIVE

48-V, 16-bit high-precision I²C output digital power monitor with alert

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Data sheet

INA232

ACTIVE
Data sheet Order now

Product details

Common-mode voltage (max) (V) 48 Common-mode voltage (min) (V) -0.3 Digital interface I2C Resolution (Bits) 16 Input offset (±) (max) (µV) 50 Input offset drift (±) (max) (µV/°C) 0.1 Voltage gain (V/V) 1 CMRR (min) (dB) 120 Gain error (%) 0.3 Gain error drift (±) (max) (ppm/°C) 30 Features Alert Function, Bidirectional, Intergrated Power Monitor, Low-side Capable Number of channels 1 Power measurement accuracy (%) 0.8 Rating Catalog Operating temperature range (°C) -40 to 125
Common-mode voltage (max) (V) 48 Common-mode voltage (min) (V) -0.3 Digital interface I2C Resolution (Bits) 16 Input offset (±) (max) (µV) 50 Input offset drift (±) (max) (µV/°C) 0.1 Voltage gain (V/V) 1 CMRR (min) (dB) 120 Gain error (%) 0.3 Gain error drift (±) (max) (ppm/°C) 30 Features Alert Function, Bidirectional, Intergrated Power Monitor, Low-side Capable Number of channels 1 Power measurement accuracy (%) 0.8 Rating Catalog Operating temperature range (°C) -40 to 125
SOT-23-THN (DDF) 8 8.12 mm² (2.9 mm × 2.8 mm)
  • High-side or low-side current sensing
  • Operates from a 1.7-V to 5.5-V power supply
  • Reports current, voltage and power
  • Programmable full scale range: 20mV / 80mV
  • Input common mode range: –0.3 V to 48 V
  • Current monitoring accuracy:
    • 16-bit ADC resolution
    • 0.3% gain error (maximum)
    • 50-µV offset (maximum)
  • Low input bias current: 10 nA (maximum)
  • Configurable averaging options
  • General call addressing allows conversion synchronization among devices
  • Alert limits for over and under current events
  • 1.2-V compliant I2C, SMBus interface
  • Two device address options with four pin selectable address
  • SOT23-8 Package
  • Operating temperature: –40°C and +125°C
  • High-side or low-side current sensing
  • Operates from a 1.7-V to 5.5-V power supply
  • Reports current, voltage and power
  • Programmable full scale range: 20mV / 80mV
  • Input common mode range: –0.3 V to 48 V
  • Current monitoring accuracy:
    • 16-bit ADC resolution
    • 0.3% gain error (maximum)
    • 50-µV offset (maximum)
  • Low input bias current: 10 nA (maximum)
  • Configurable averaging options
  • General call addressing allows conversion synchronization among devices
  • Alert limits for over and under current events
  • 1.2-V compliant I2C, SMBus interface
  • Two device address options with four pin selectable address
  • SOT23-8 Package
  • Operating temperature: –40°C and +125°C

The INA232 device is a 16-bit digital current monitor with an I2C/SMBus-compatible interface that is compliant with a wide range of digital bus voltages such as 1.2 V, 1.8 V, 3.3 V, and 5.0 V. The device monitors the voltage across an external sense resistor and reports values for current, bus voltage, and power.

The INA232 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 over/under current as well as over/under voltage conditions. High input impedance while in current measurement mode allows use of larger current sense resistors needed to measure small value system currents.

The INA232 senses current on common-mode bus voltages that can vary from –0.3 V to 48 V, independent of the supply voltage. The device operates from a single 1.7-V to 5.5-V supply, drawing a typical supply current of 300 µA in normal operation. The device can be placed in a low-power standby mode where the typical operating current is 2.2 µA.

The INA232 device is a 16-bit digital current monitor with an I2C/SMBus-compatible interface that is compliant with a wide range of digital bus voltages such as 1.2 V, 1.8 V, 3.3 V, and 5.0 V. The device monitors the voltage across an external sense resistor and reports values for current, bus voltage, and power.

The INA232 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 over/under current as well as over/under voltage conditions. High input impedance while in current measurement mode allows use of larger current sense resistors needed to measure small value system currents.

The INA232 senses current on common-mode bus voltages that can vary from –0.3 V to 48 V, independent of the supply voltage. The device operates from a single 1.7-V to 5.5-V supply, drawing a typical supply current of 300 µA in normal operation. The device can be placed in a low-power standby mode where the typical operating current is 2.2 µA.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet INA232 48-V, 16-Bit, Current, Voltage, and Power Monitor With an I2C Interface datasheet PDF | HTML Dec 16, 2022
Application note Closed Loop Constant Power Drive to Simplify Heater Element Control and Extend Battery Life PDF | HTML Jan 29, 2025
Application note Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers PDF | HTML Nov 18, 2024
Technical article 4 key current-sensing design trends that are powering electrification PDF | HTML Feb 21, 2023
User guide Migration From INA219 to INA232 PDF | HTML Jan 24, 2023
Certificate INA232EVM EU RoHS Declaration of Conformity (DoC) Jan 17, 2023
Application note Digital Interfaces for Current Sensing Devices (Rev. A) PDF | HTML Sep 30, 2021
Application note Getting Started with Digital Power Monitors (Rev. A) PDF | HTML Sep 2, 2021

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

INA234_236EVM — INA232, INA234 and INA236 evaluation module for current/voltage/power monitors

This evaluation module (EVM) is an easy-to-use platform to evaluate the main features and performance of the INA232, INA234 or INA236. The EVM comes with GUI support to read and write to device registers.
User guide: PDF | HTML
Supported products & hardware
IDE, configuration, compiler or debugger

ASC-STUDIO-INA232 — ASC Studio (SysConfig) for configuring all aspects of the INA232 current sensor

SysConfig can be used to help simplify configuration challenges and accelerate software development with the INA232 current sensor.
Supported products & hardware
Calculation tool

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 (...)

Supported products & hardware
Calculation tool

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 (...)
Supported products & hardware
Package Pins CAD symbols, footprints & 3D models
SOT-23-THN (DDF) 8 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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