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)

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