INA234
- 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 28 V
- Current monitoring accuracy:
- 12-bit ADC resolution
- 0.5% gain error (maximum)
- 100-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 I 2C, SMBus interface
- Two device address options with a 4-pin selectable address
- DSBGA-8 Package (0.745 mm × 1.508 mm)
- Operating temperature: –40°C and +125°C
The INA234 device is a 12-bit digital current monitor with an I 2C/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 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 overcurent 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 –0.3 V to 28 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.
Technical documentation
Type | Title | Date | ||
---|---|---|---|---|
* | Data sheet | INA234 28-V, 12-Bit, Current, Voltage, and Power Monitor With an I2C Interface datasheet (Rev. C) | PDF | HTML | 31 Mar 2023 |
Application note | Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers | PDF | HTML | 18 Nov 2024 | |
EVM User's guide | INA232EVM, INA234EVM and INA236EVM User's Guide (Rev. B) | PDF | HTML | 23 Dec 2022 | |
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.
INA234_236EVM — INA232, INA234 and INA236 evaluation module for current/voltage/power monitors
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
Products
Precision op amps (Vos<1mV)
General-purpose op amps
Audio op amps
Transimpedance amplifiers
High-speed op amps (GBW ≥ 50 MHz)
Power op amps
Video amplifiers
Line drivers
Transconductance amplifiers & laser drivers
Fully differential amplifiers
Precision ADCs
Biosensing AFEs
High-speed ADCs (≥10 MSPS)
Touchscreen controllers
Difference amplifiers
Instrumentation amplifiers
Audio line receivers
Analog current-sense amplifiers
Digital power monitors
Analog current-sense amplifiers with integrated shunt resistor
Digital power monitors with integrated shunt resistor
Die & wafer services
RF receivers
RF transmitters
CS-AMPLIFIER-ERROR-TOOL — Current Sense Amplifier Comparison and Error Tool
Supported products & hardware
Products
Analog current-sense amplifiers
Digital power monitors
SBOR021 — Power Monitor Tool
Supported products & hardware
Products
Digital power monitors
Digital power monitors with integrated shunt resistor
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
TINA-TI — SPICE-based analog simulation program
Package | Pins | CAD symbols, footprints & 3D models |
---|---|---|
DSBGA (YBJ) | 8 | Ultra Librarian |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
- Fab location
- Assembly location
Support & training
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