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INA234

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28-V, 12-bit, I²C output current/voltage/power monitor with alert in WCSP

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Data sheet

INA234

ACTIVE
Data sheet Order now

Product details

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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Technical documentation

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* Data sheet INA234 28V , 12-Bit , Current, Voltage, and Power Monitor With an I2 C Interface datasheet (Rev. D) PDF | HTML 27 Aug 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 Jan 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 Jan 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

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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IDE, configuration, compiler or debugger

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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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 (...)
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SBOR021 — Power Monitor Tool

Power Monitor Tool
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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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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 (...)
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