Description 4-Channel ADS1115 16-Bit ADC - STEMMA QT / Qwiic

The 4-Channel ADS1115 16-Bit ADC is perfect for microcontrollers that don't have an analog-to-digital converter. It's also useful if you want a higher precision ADC. This chip features 16-bit precision at 860 samples per second over I2C. The ADS1115 can be configured as four single-ended inputs or two differential inputs. It also has a programmable amplifier up to x16, which amplifies small signals to full range. This ADC operates on 2V to 5V power/logic, measures a wide range of signals, and is very easy to use. It's an excellent general purpose 16-bit converter.

The chip is small and comes on a breakout board with ferrites to keep AVDD and AGND quiet. Interfacing is done via I2C. The address can be changed to one of four options (see the datasheet, table 5). This allows you to connect up to four ADS1115s to a single 2-wire I2C bus for 16 single inputs.

A QT cable is not included, but several types are available in the store. There is example code for Raspberry Pi , Arduino , and CircuitPython . Connect GND to ground, VDD to your logic power supply, and SCL/SDA to the I2C port of your microcontroller to read data.