Microprocessors and Microcontrollers: Unit IV: (f) A/D and D/A Converter Interfacing with 8085
Digital to Analog Converter
A/D and D/A Converter Interfacing with 8085
Review Questions : 1. What is digital to analog converter? 2. Draw the 3-bit digital to analog converter block and plot it's analog output.
Digital to Analog Converter
A
DAC (Digital to Analog Converter) accepts an n-bit input word b1, b2,
b3,
Bn
in binary and produce an analog signal proportional to it. Fig. 13.1.1 (a)
shows circuit symbol and input-output characteristics of a 4-bit DAC. There are
four digital inputs, indicating 4-bit DAC. Each digital input requires an
electrical signal representing either a logic 1 or a logic 0. The b is the
least significant bit, LSB, whereas b1 is the most significant bit, MSB.
Fig.
13.1.1 (b) shows analog output voltage Vo is plotted against all 16
possible digital input words.
Review Questions
1. What is digital
to analog converter?
2. Draw the 3-bit digital to analog converter block and plot it's analog output. AU : Dec.-12, Marks 2
Microprocessors and Microcontrollers: Unit IV: (f) A/D and D/A Converter Interfacing with 8085 : Tag: : A/D and D/A Converter Interfacing with 8085 - Digital to Analog Converter