Digital-to-Analog Converter (DAC) -Free 8085 Microprocessor datas

DAC 0800

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

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

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

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

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

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

Every analog output will be a multiple of the resolution.

For example, consider an 8-bit DAC with reference analog voltage of 5 volts. The analog values for all possible digital input are as shown.

8085 Free Projects

8085 Free Programs

Interfacing Techniques

Electronic Tutorials

Electronic Projects

PIN DIGRAM & BLOCK DIAGRAM OF DAC0800

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

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

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

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

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

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.

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

The pin configuration of DAC0800 is,

Interfacing DAC0-800 with 8085

The internal block diagram of DACO800 is,