{"title":"Adafruit INA238 DC Current Voltage Power Monitor","handle":"adafruit-ina238-dc-current-voltage-power-monitor-ada6349","url":"/products/adafruit-ina238-dc-current-voltage-power-monitor-ada6349","description":"The Adafruit INA238 is a precision DC power monitor capable of measuring current, voltage, and power on either the high or low side of your circuit. With support for up to +85V DC common-mode voltage and a 16-bit ADC, it delivers accurate measurements from microamps to 10A — all over a simple I2C interface.\n\nFeaturing an integrated 15 mΩ (0.015Ω) 0.1% shunt resistor, configurable gain, oversampling, and alert thresholds, this breakout replaces two multimeters with a single chip. It works with 3.3V or 5V logic and includes STEMMA QT / Qwiic connectors for solderless I2C wiring.\n\nKey Features\n\n\nUp to +85V DC – High or low-side current measurement with wide common-mode voltage range\n\nTwo Current Ranges – Up to 10A (~0.15 mA/LSB) or 2.75A (~42 µA/LSB) continuous\n\n16-bit ADC – Precision current, voltage, and automatic power calculation\n\n15 mΩ Integrated Shunt – 0.1% precision shunt resistor with 0.1% gain error and ±5 µV max offset\n\nI2C Interface – Configurable alerts, oversampling, and gain; up to 4 sensors per bus\n\nSTEMMA QT / Qwiic Connectors – Solderless I2C connection with daisy-chain support\n\n3.3V & 5V Compatible – Works with Arduino, CircuitPython, Raspberry Pi, and more\n\nHigh or Low-Side Wiring – Jumper on back allows configuration for either measurement topology\n\n\nINA238 vs INA237 vs INA228\n\n\nINA238: 16-bit, 0.1% gain error, ±5 µV max offset — code-compatible with INA237 at higher precision\n\nINA237: 16-bit, 0.3% gain error, ±50 µV max offset — lower cost alternative\n\nINA228: 20-bit (10 µA / 2.5 µA LSB), 0.05% gain error, ±1 µV offset, plus energy/charge measurement\n\n\nIdeal For\n\nBattery and solar panel power monitoring\nHigh-voltage DC system current profiling (up to 85V)\nEmbedded power consumption analysis and optimisation\nProjects requiring both high-side voltage and current measurement\n\n\nPackage Contents\n\n1× Adafruit INA238 Power Monitor Breakout (assembled)\n1× 3.5 mm Terminal Block\n1× Header Strip\n\n\n\nWarning: Not for use with AC voltages. DC only, up to +85V.\n\n\nResources\n\nAdafruit INA238 Guide\nArduino INA237/INA238 Library (GitHub)\nSTEMMA QT Overview\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":304,"title":"Default Title","sku":"AF-6349","mpn":"ADA6349","price":21.5,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":100,"option1":"Default Title"}]}