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AD5272 Tolerance

Question asked by sneha on Dec 21, 2015
Latest reply on Dec 10, 2016 by m3atwad

Hi,


We are using AD5272 digital potentiometer. From Table 2 of Datasheet, in R-perf mode, resistor  tolerance is 1%, when code range is from 0x078 to 0x3FF. 2% R-Tolerance when code from 0x037 to 0x3FF. So, if we use from from 0x0 to 0x3FF, what would be the expected tolerance percentage?

 

One more question is, what is the maximum wiper resistance of AD5272. There are two conflicting values in datasheet.  Wiper resistance typical is 35 and maximum is 70 ohm in page 3, with code=zero scale. And in page 23, it is written that "In the zero-scale condition, a finite total wiper resistance of 120 Ω is present." which one is correct?


regards,
Sneha

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