How to know the AD conversion result?

yealien

How to know the AD conversion result? [Copy link]

Experts, how can I know the corresponding output result of the input analog quantity of the PIC microcontroller? For example, the power supply voltage is 5V, the reference voltage is the internal voltage of the microcontroller (5V), and the AD is 10 bits. How much does the input analog quantity of 1V correspond to? How much does it correspond to 1.5V? How much does it correspond to 2V?

kevinrobot

The sampling value is: Vi*1/2^10

thtlj

Calculated in proportion: AD=2^10^(Vi/5) [ This post was last edited by thtlj on 2009-7-20 10:13 ]

ccmj4708

The calculation formula for 10-bit AD conversion is 1024*Vin / Vcc. Please refer to the corresponding PDF document.

yealien

Does it have nothing to do with the reference voltage? I saw a formula: "(2 to the 10th power)/(reference voltage)*input analog value 1V". This formula seems to be related to the reference voltage.

user22901

You said in the title that it is a 5V reference, so the value is 1024×(1V/5V)

skymaster

Calculation formula: 2^10*Vin/5