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INA232

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48-V, 16-bit high-precision I²C output current/voltage/power monitor with alert

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Data sheet

INA232

ACTIVE
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Product details

Common-mode voltage (max) (V) 48 Common-mode voltage (min) (V) -0.3 Input offset (±) (max) 0.00005 Voltage gain (V/V) 1 CMRR (min) (dB) 120 Bandwidth (MHz) 0.01 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 1.7 Digital interface I2C Features Alert Function, Bi-directional, Integrated Power Monitor, Low-side Capable Resolution (Bps) 16 Rating Catalog Operating temperature range -40 to 125
Common-mode voltage (max) (V) 48 Common-mode voltage (min) (V) -0.3 Input offset (±) (max) 0.00005 Voltage gain (V/V) 1 CMRR (min) (dB) 120 Bandwidth (MHz) 0.01 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 1.7 Digital interface I2C Features Alert Function, Bi-directional, Integrated Power Monitor, Low-side Capable Resolution (Bps) 16 Rating Catalog Operating temperature range -40 to 125
SOT-23-THN (DDF) 8 8.12 mm² 2.9 x 2.8
  • 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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Type Title Date
* Data sheet INA232 48-V, 16-Bit, Current, Voltage, and Power Monitor With an I2C Interface datasheet PDF | HTML 16 Dec 2022
Technical article 4 key current-sensing design trends that are powering electrification 21 Feb 2023
User guide Migration From INA219 to INA232 PDF | HTML 24 Jan 2023
Certificate INA232EVM EU RoHS Declaration of Conformity (DoC) 17 Jan 2023
EVM User's guide INA232EVM, INA234EVM and INA236EVM User's Guide (Rev. B) PDF | HTML 23 Dec 2022
Technical article Solving the multidecade current-measurement challenge in your 48-V BMS application 14 Jun 2021
Technical article How current-sense amplifiers monitor satellite health 08 Feb 2021
Technical article A key to accurate system thermal management: monitoring both current flow and temperature 04 Oct 2018

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
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Simulation tool

TINA-TI — SPICE-based analog simulation program

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 (...)
User guide: PDF
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Package Pins Download
SOT-23-THN (DDF) 8 View options

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