Adafruit MCP3421 18-Bit ADC - STEMMA QT / Qwiic

The Adafruit MCP3421 18-Bit ADC offers precise, easy-to-integrate analog-to-digital conversion with its I2C interface. Functioning efficiently at a clock rate of up to 3.4MHz, it's tailored for differential input readings within the 0 to 2.048V range.

Features include selectable 18-bit resolution at 3.75 SPS up to 12-bit at 240 SPS. Ideal for precision measurements like those from strain gauges or thermocouples, it seamlessly connects via STEMMA QT for solderless integration.

An adjustable gain amplifier and precision low-drift voltage reference ensure accuracy. Compatibility with Arduino through a dedicated library simplifies configuration for continuous or one-shot mode readings. Combine with a multiplexor for expanded projects.