INA228
85-V, 20-bit, ultra-precise, I2C output current/voltage/power/energy/charge monitor with alert
INA228
- High-resolution, 20-bit delta-sigma ADC
- Current monitoring accuracy:
- Offset voltage: ±1 µV (maximum)
- Offset drift: ±0.01 µV/°C (maximum)
- Gain error: ±0.05% (maximum)
- Gain error drift: ±20 ppm/°C (maximum)
- Common mode rejection: 154 dB (minimum)
- Power monitoring accuracy:
- 0.5% full scale, –40°C to +125°C (maximum)
- Energy and charge accuracy:
- 1.0% full scale (maximum)
- Fast alert response: 75 µs
- Wide common-mode range: –0.3 V to +85 V
- Bus voltage sense input: 0 V to 85 V
- Shunt full-scale differential range: ±163.84 mV / ±40.96 mV
- Input bias current: 2.5 nA (maximum)
- Temperature sensor: ±1°C (maximum at 25°C)
- Programmable resistor temperature compensation
- Programmable conversion time and averaging
- 2.94-MHz high-speed I2C interface with 16 pin-selectable addresses
- Operates from a 2.7-V to 5.5-V supply:
- Operational current: 640 µA (typical)
- Shutdown current: 5 µA (maximum)
The INA228 is an ultra-precise digital power monitor with a 20-bit delta-sigma ADC specifically designed for current-sensing applications. The device can measure a full-scale differential input of ±163.84 mV or ±40.96 mV across a resistive shunt sense element with common-mode voltage support from –0.3 V to +85 V.
The INA228 reports current, bus voltage, temperature, power , energy and charge accumulation while employing a precision ±0.5% integrated oscillator, all while performing the needed calculations in the background. The integrated temperature sensor is ±1°C accurate for die temperature measurement and is useful in monitoring the system ambient temperature.
The low offset and gain drift design of the INA228 allows the device to be used in precise systems that do not undergo multi-temperature calibration during manufacturing. Further, the very low offset voltage and noise allow for use in mA to kA sensing applications and provide a wide dynamic range without significant power dissipation losses on the sensing shunt element. The low input bias current of the device permits the use of larger current-sense resistors, thus providing accurate current measurements in the micro-amp range.
The device allows for selectable ADC conversion times from 50 µs to 4.12 ms as well as sample averaging from 1x to 1024x, which further helps reduce the noise of the measured data.
Similar products you might be interested in
Drop-in replacement with upgraded functionality to the compared device
Technical documentation
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
AWR2544LOPEVM — AWR2544LOP evaluation module for automotive 2nd-generation, 76GHz to 81GHz, high-performance SoC
AWRL1432BOOST-BSD — AWRL1432 single-chip mmWave sensor evaluation board for blind spot detection
AWRL1432BOOST-BSD is an easy-to-use 70GHz mmWave sensor evaluation kit based on AWRL1432 device with onboard ROGERS RO3003 high-performance antenna. This board enables access to point-cloud data and power over USB interface. The AWRL1432BOOST-BSD supports direct connectivity to the DCA1000EVM (...)
AWRL6432BOOST — AWRL6432BOOST BoosterPack™ evaluation module for single-chip low-power mmWave radar sensor
AWRL6432BOOST is an easy-to-use low-power 60GHz mmWave sensor evaluation kit for the AWRL6432 with an FR4-based antenna. This board enables access to point-cloud data and power-over-USB interfaces.
AWRL6432BOOST supports direct connectivity to DCA1000EVM. The BoosterPack is supported by mmWave (...)
INA228_237_238EVM — INA228, INA237 & INA238 evaluation module
This evaluation module (EVM) is an easy-to-use platform to evaluate the main features and performance of the INA228, INA237 or INA238.
The EVM supports current measurements up to 10-A and comes with graphical user interface (GUI) support to read and write to device registers.
IWRL1432BOOST-BSD — IWRL1432 evaluation module for BSD with low-power 76-GHz to 81-GHz industrial radar sensor
IWRL1432BOOST-BSD is an easy-to-use 77 GHz mmWave sensor evaluation kit based on IWRL1432 device with on board ROGERS RO3003 high-performance antenna. This board enables access to point-cloud data and power over USB interface. The IWRL1432BOOST-BSD also has a 12V operated TCAN4550 for applications (...)
IWRL6432AOPEVM — IWRL6432AOP evaluation module for single-chip 60GHz antenna-on-package (AoP) mmWave sensor
The xWRL6432AOPEVM is an easy-to-use, low cost FR4-based evaluation board for the xWRL6432AOP mmWave sensing device, with standalone operation and direct connectivity to the DCA1000EVM for raw ADC capture and signal processing development. This EVM contains everything required to start developing (...)
IWRL6432BOOST — IWRL6432 BoosterPack™ evaluation module for single-chip 60GHz mmWave low-power sensor
IWRL6432BOOST is an easy-to-use 60GHz mmWave sensor evaluation kit based on IWRL6432 device with on board FR4-based antenna. This board enables access to point-cloud data and power-over-USB interface. The IWRL6432BOOST supports direct connectivity to the DCA1000EVM development kit.
This kit is (...)
TMDSCNCD263P — AM263Px general-purpose controlCARD™ development kit Arm®-based MCU
TMDSCNCD263P is an HSEC180 controlCARD-based evaluation and development tool for the AM263Px series Sitara™ high-performance microcontrollers. This board is ideal for initial evaluation and prototyping as it provides a standardized and easy-to-use platform to develop your next application. (...)
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 transceivers
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
TIDEP-01035 — Video surveillance camera reference design using TI mmWave Radar
Package | Pins | CAD symbols, footprints & 3D models |
---|---|---|
VSSOP (DGS) | 10 | 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
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.