Home | | Microprocessors and Microcontrollers | DAC Interfacing with 8085 Microprocessor

Chapter: Microprocessor and Microcontroller - Peripheral Interfacing

| Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail |

DAC Interfacing with 8085 Microprocessor

1 DAC 0800 Features 2 Circuit Diagram of DAC 0800

DAC Interfacing with 8085 Microprocessor

 

1 DAC 0800 Features


ü To convert the digital signal to analog signal a Digital-to-Analog Converter (DAC) has to be employed.

ü The DAC will accept a digital (binary) input and convert to analog voltage or current.

ü Every DAC will have "n" input lines and an analog output.

ü The DAC require a reference analog voltage (Vref) or current (Iref) source.

ü The smallest possible analog value that can be represented by the n-bit binary code is called resolution.

ü The resolution of DAC with n-bit binary input is 1/2nof reference analog value.



2 Circuit Diagram of DAC 0800

 

ü The DAC0800 is an 8-bit, high speed, current output DAC with a typical settling time (conversion time) of 100 ns.

 

ü It produces complementary current output, which can be converted to voltage by using simple resistor load.

 

ü     The DAC0800 require a positive and a negative supply voltage in the range of ± 5V to ±18V.

 

 

ü It can be directly interfaced with TTL, CMOS, PMOS and other logic families.

ü For TTL input, the threshold pin should be tied to ground (VLC = 0V).

 

ü The reference voltage and the digital input will decide the analog output current, which can be converted to a voltage by simply connecting a resistor to output terminal or by using an op-amp I to V converter.

ü The DAC0800 is available as a 16-pin IC in DIP.


Table 3.2 ADC Conversion Table

 

 

Square Wave Generation Using DAC 0800

 


 

Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail


Copyright © 2018-2020 BrainKart.com; All Rights Reserved. Developed by Therithal info, Chennai.