Adafruit INA228 Shield

Overview

The Adafruit INA228 High or Low Side Power Monitor features the TI INA228 current sensor, an I2C 20-bit power monitoring chip, with two STEMMA QT connectors. This board is capable of measuring up to 85VDC common-mode, high or low side measurements ranging from milli-amps to amps.

Adafruit INA228 Shield (Credit: Adafruit)

Requirements

This shield can be used with boards which provide an I2C connector, for example STEMMA QT or Qwiic connectors. The target board must define a zephyr_i2c node label. See Shields for more details.

Pin Assignments

Shield Pin	Function
SDA	INA228 I2C SDA
SCL	INA228 I2C SCL
ALRT	INA228 ALERT out
VIN-	Current sense neg
VIN+	Current sense pos
VBUS	Voltage sense

See ti,ina228 for documentation on how to adjust the devicetree file, for example to adjust the sample averaging.

Programming

Set --shield adafruit_ina228 when you invoke west build. For example when running the Sensor shell sample:

# From the root of the zephyr repository
west build -b adafruit_qt_py_rp2040 --shield adafruit_ina228 samples/sensor/sensor_shell