Spot supply, you can shoot directly! For microcontrollers without an analog-to-digital converter or when you want a higher-precision ADC, the ADS1115 provides 16-bit precision at samples/second over I2C. The chip can 860 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. We like this ADC because it can run from 2V to 5V 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 chip's 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 (see the datasheet table so you can have 5) up to 4 ADS1115's connected on a single 2-wire I2C bus for 16 single ended inputs. SUPPLY RANGE: 2.0V to 5.5V WIDE CURRENT CONSUMPTION: LOW Continuous Mode: Only 150 A Single-Shot Mode: Auto Shut-Down DATA RATE: 8SPS to 860SPS PROGRAMMABLE LOW-DRIFT VOLTAGE REFERENCE INTERNAL OSCILLATOR INTERNAL PGA INTERNAL INTERFACE: Pin-Selectable Addresses I2C SINGLE-ENDED OR TWO DIFFERENTIAL INPUTS FOUR COMPARATOR PROGRAMMABLE Board/chip uses I2C 7-bit This addresses between 0x48-0x4B selectable, with jumpers.