SparkFun_Qwiic_Current_Sensor_INA2XX

SparkFun Current Sensor - INA228 and SparkFun Current Sensor - INA237 (Qwiic)

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The SparkFun Current Sensor - INA228/INA237 (Qwiic) are high-precision, inline power measurement breakouts built around the INA228 from Texas Instruments. Wire your load's VBUS, IN+, and IN- to the onboard 3.5mm screw terminal, and the INA228 delivers calibrated current, bus voltage, and power readings over I2C — no external math required. A 15 mΩ shunt resistor comes pre-populated, and configurable I2C address jumpers (A0, A1) let you run up to four sensors on a single bus.

Designed for our Qwiic ecosystem, this 1" × 1" board plugs straight into any Qwiic-enabled microcontroller. An ALERT pin is broken out on the PTH header alongside GND, 3V3, SDA, and SCL for interrupt-driven workflows or non-Qwiic setups. Whether you are profiling battery discharge curves, monitoring solar panel output, or adding overcurrent protection to a robot, the INA228 gives you 20-bit measurement resolution in a compact, breadboard-friendly package. The INA237 offers very similar performance figures with a 16-bit measurement resolution.

Repository Contents

• /docs - Documentation files for GitHub pages
• /Documents - Datasheets, additional product information
• /Hardware - KiCad design files (.kicad_sch, .kicad_pcb)
• /Production - Production panel files

Documentation

• Library - Arduino library for the SparkFun Qwiic Current Sensor - INA228 and INA237.
• Hookup Guide - Basic hookup guide for the SparkFun Qwiic Current Sensor - INA228 and INA237.

Product Versions

• SEN-31437 - SparkFun Current Sensor - INA237 (Qwiic) initial release.
• SEN-31438 - SparkFun Current Sensor - INA228 (Qwiic) initial release.

License Information

This product is open source!

Please review the LICENSE.md file for license information.

If you have any questions or concerns about licensing, please contact technical support on our SparkFun forums.

Distributed as-is; no warranty is given.

- Your friends at SparkFun.