Page: Disadvantages of weighted resistor DAC
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i) The accuracy and stability of thie type DAC depends on the accuracy of the resistors used.

ii) This type of DAC requires a wide range of resistor values. If n=8 then smallest resistor 2 R=2R/2 & largest resistor $2^{\gamma}=128 R/2$. Thus the largest resistor is 128 times the smallest one. This proportion will be norse for still highervalues of n

iii) Fo rn=12. if smallest resistance =2.5 k/2; then largest resistance in an 1c form is not practically possible.

iv) The finite resistance of the switches distrubs the current particulary in MSB Posn where the current setting resistors are small in value

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 written 6 days ago by
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