sfDevINA237.cpp File Reference

Implementation file for the SparkFun INA237 power monitor driver. More...

#include "sfDevINA237.h"

Detailed Description

Implementation file for the SparkFun INA237 power monitor driver.

This file implements INA237-specific measurement methods including 16-bit register reads and the INA237 calibration formula.

INA237 ADC Details:

• 16-bit ADC
• VSHUNT/VBUS/CURRENT registers are 16 bits wide
• POWER register is 24 bits wide (unsigned)
• No ENERGY or CHARGE registers
• Shunt LSB: 5 uV (ADCRANGE=0) or 1.25 uV (ADCRANGE=1)
• Bus LSB: 3.125 mV
• Temp LSB: 125 m-deg-C (data in bits [15:4], 12-bit)
• Calibration scale: 819.2 x 10^6 (x4 for ADCRANGE=1)

Author

SparkFun Electronics

Date

2025

Copyright

Copyright (c) 2025, SparkFun Electronics Inc. All rights reserved.

SPDX-License-Identifier: MIT

See also

https://github.com/sparkfun/SparkFun_INA2XX_Arduino_Library