ADE Lab Experiment 11: Generate a Ramp output waveform using DAC0800.

Generating a Ramp output waveform using DAC0800 (Inputs are given to DAC through IC74393 dual 4-bit binary counter).

Circuit Diagram:

In the above configuration the DAC 0800 produces output voltages at EO and EO’ terminals as follows:

The output voltages obtained for some of the individual counts are as follows:

Procedure:

•   Rig up the circuit as shown in the diagram with proper power supplies in a trainer kit. 
•   Keep the MSB bits in a suitable required value using toggle switches (eg: 0110 = 9)
•  Feed the LSB bits from the 4 bit counter which counts from 0000 to 1111. 
•  (Alternatively we can construct a full 8bit counter using 74LS393)
•   Supply a 1KHz clock to the counter and observe the ramp output on CRO.
• Voltages for individual counts can be measured in a voltmeter by applying mono pulses to the counter.

Calculations: 

           Output voltages can be theoretically calculated using following formula:

Output: 

           The output wave form obtained (for counts 96 to 111) is as shown below-

Need any help ..? 

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