1. U6 MCP4725 12bit Digital-to-Analog Converter ,    Datasheet

    JP16 (AOUT, GND) 

2. U11 ADS1115 16bit  Analog-to-Digital Converter ,   Datasheet

    J1 INPUT (AIN0, AIN1,AIN2,AIN3,3V3,GND)      

I2c detect      49  -  ADS1115

                      60   -  MCP4725