Question

ADC, DAC Equations ADC: Vin input voltage, Vreft= reference voltage, Vref- N=number of bits of precision 0 V Vin/Vref output code/ 2N 2N output code Vref Vin Vref/2N 1 LSB DAC: Vout output voltage, Vref= reference voltage, N number of bits of precision 2Ninput code Vref Vout Vout/ Vref input_code/ 2N nn nun enhuu nnde Vref/2N 1 LSB Question 3 If Vref 5V, and a 8-bit A/D output code is OXFF, what is the ADC input voltage? If Vref 4V, and a 10-bit A/D output code is 0x339, what is the ADC input voltage? If Vref 3.3V, and a 12-bit A/D output code is 0xBB8, what is the ADC input voltage?

Answer 1

. Given Vrep = 5V and 8-bit AOC output code = oxff (Hexadecimal code given) and we have to calculate analog input we have a formula Vanalog ilp - rescafion x decimal value of given binary code (Hexadecimal code] resolution : Vref 3 N Ne number of bits Vesoultion - 5 = 19.53 my decimal value of given Hexadecimal base any code = 255 . .: Vanalog ilp. = 19.53 x163 X.255 = 4.98V cs Scanned with Camiseen

Given Verer- - UV NE 10 Given by Code de = 339 - already given code in decimal, so no need to Convert . . - Vanalog ip = Resolution X given abeceroutput code Resoultion - 2.1 210 - Resolution - 3.90 mu Vanalog ilp : 3.90x 10° x 339 ļ Vanalog ilp = 1,324 v Scanned with CamScanner

- Given Vref = 3.30 number of bits N= 12 , output code' B68 (Hexadecimal code) so we have to convert given Hexadecimal into binary code and then to decimal code Herodecimal i binary ., deimal BB% 11110111000 3000 :: Vanalog ilp = Resolution X decimal malw of op. Resduttion : 3.3 . 2N Resclution = 0.9 mv .: Vanalog ilp = 0.8 x 103 x 3000 = 2. UV Scanned with CamScanner:
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