Adafruit ADS1115 16-Bit ADC - 4 Channel with Programmable Gain Amplifier - Add-on board

For microcontrollers without an analog-to-digital converter or when you want a higher-precision ADC, the ADS1115 provides 16-bit precision at 860 samples/second over I2C. The chip can be configured as 4 single-ended input channels, or two differential channels. As a nice bonus, it even includes a programmable gain amplifier, up to x16, to help boost up smaller single/differential signals to the full range. They like this ADC because it can run from 2 V to 5 V power/logic, can measure a large range of signals and its super easy to use. It is a great general purpose 16 bit converter. The chips fairly small so it comes on a breakout board with ferrites to keep the AVDD and AGND quiet. Interfacing is done via I2C. The address can be changed to one of four options so you can have up to 4 ADS1115s connected on a single 2-wire I2C bus for 16 single ended inputs. Wide supply range: 2.0 V to 5.5 V Internal low-drift voltage reference Internal oscillator Internal PGA I2C interface: Pin-selectable addresses Four single-ended or two differential inputs Programmable comparator