12 bit adc arduino mega - Arduino - AnalogReadResolution
Atmel AVR1300: Using the Atmel AVR XMEGA ADC [APPLICATION NOTE 8032IAVR 2 Features Up to 12 bit resolution Up to 2M samples per second
AdafruitADS1X15 Driver for TI's ADS1015: 12bit Differential or SingleEnded ADC with PGA and Comparator
SPIADC. Similar to the SPI higher resolution 12bit analog input and output signals with an Arduino. 6 Dout Arduino pin 12 7 SCK Arduino pin 13
Using with Arduino. TWBR 12; 400 khz You can speed this up a bit more, if you'd like, check the ATmega328 datasheet for how to calculate the TWBR register.
For example: using the Due with on a 12bit DAC pin, the Arduino will add 4 zero bits to the 8bit value used in analogWrite().
MCP4725 12Bit DAC Tutorial Your microcontroller probably has an ADC (on the Uno, this is A4 on the Mega it is 20 and on the Leonardo digital 2)