The ADS1115-BRVG is a high-precision 16-bit analog to digital converter module, with jumper-selectable and software-selectable gain settings. It uses an Inter-Integrated Circuit (I2C) interface to enable simple communications with computer or microcontroller modules such as the Raspberry Pi™ or Arduino™. This board is particularly useful for measuring 0 to 5 V (or higher) analog voltages when only a 3.3V supply is available for the board. The jumper settings can be set to divide the incoming voltage to a safe level (ex. less than 3.3V). 
 
See www.innaturerobotics.com/support for documentation, library drivers, and sample code for the ADS1115-BRVG: