INA231
- Bus voltage sensing from 0 V to 28 V
- High- or low-side sensing
- Current, voltage, and power reporting
- High accuracy:
- Gain error: 0.5% (maximum)
- Offset: 50 µV (maximum)
- Configurable averaging options
- Programmable alert threshold
- 1.8-V I2C compliant
- Power-supply operation: 2.7 V to 5.5 V
- Start-up mode options:
- INA231A: active conversion
- INA231B: low-current power down
The INA231 is a current-shunt and power monitor with a 1.8-V compliant I2C interface that features 16 programmable addresses. The INA231 monitors both shunt voltage drops and bus supply voltage, providing increased protection by asserting the ALERT pin if the values are outside the programmed range. Programmable calibration value, conversion time, and averaging, combined with an internal multiplier, enable direct readouts of current in amperes and power in watts, thus reducing host processing.
The INA231 senses current on bus voltages that vary from 0 V to 28 V, with the device powered from a single 2.7-V to 5.5-V supply, drawing 330 µA (typical) of supply current. The INA231 is specified over the operating temperature range of –40°C to +125°C.
The INA231 is available in two versions: the INA231A starts up performing continuous conversions of the shunt and bus voltage, whereas the INA231B starts up in low-current, power-down mode.
Technical documentation
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
INA231EVM — INA231 evaluation module
The INA231 Evaluation Module (EVM) is an easy-to-use platform to evaluate the main features and performance of the INA231 device.
The EVM supports current measurements up to 10-A and comes with graphical user interface (GUI) support to read and write to device registers.
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)
Receivers
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
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
TIDA-010057 — Ultrasound smart probe power supply reference design
Package | Pins | CAD symbols, footprints & 3D models |
---|---|---|
DSBGA (YFD) | 12 | Ultra Librarian |
DSBGA (YFF) | 12 | 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
TI E2E™ forums with technical support from TI engineers
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