יום ראשון, 21 בדצמבר 2014

DAC08 DIGITAL ANALOG CONVERTER digit-to-analog converter lab report electronic engineering experiment

DAC08 DIGITAL ANALOG CONVERTER digit-to-analog converter lab report electronic engineering experiment

 Io roof Io D0 D1 D2 D3 D4 D5 D6 D 7 N 255I 0 0 0 0 0 0 0 0 0 0 254I 1I 1 0 0 0 0 0 0 0 1 253I 2I 0 1 0 0 0 0 0 0 2 252I 3I 1 1 0 0 0 0 0 0 3 251I 4I 0 0 1 0 0 0 0 0 4 250I 5I 1 0 1 0 0 0 0 0 5 249I 6I 0 1 1 0 0 0 0 0 6

As shown in the drawing, it is here I told converter / digital-to-analog: we put given eight-bit (binary numbers), if the switch on the right side of this logical zero, and if the switch on the left is the logical one.
When all the switches on the right side, meaning that all bits are zero.

Ideally - if we take the average of the steps we obtain a linear ..

In practice - there is not really 100% linear, we obtain approximate.

Resolution (discernment) is defined as the greatest of one degree.

- The size of the step will be smaller, so better resolution.
- As the number of larger steps, one step size will be smaller, so the resolution will be better.
In other words you could say: the greater the number of bits (a larger number of steps), the size of the smaller class

Equation number of steps equal to:
2 ^ (n-1)

The conclusion is that the greater the number of bits better resolution

R = 1/2 ^ (n-1)

(One unit of all the steps)

How to determine the magnitude of I?

(This is the initial part of the first drawing)

I = V / (R * 256)