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Total wipe resistance of AD5259

Question asked by moto on Jun 15, 2015
Latest reply on Jun 17, 2015 by moto


Please let me know about  these fundamental questions of AD5259.


Datasheet says


RWA(D)={(256-D)/256}XRAB   + 2 X Rw      (2)

Total wipe resistance  Rwb is 75 ohm typ @ Code 0x00


What is the relation between  these specs and Zero scale Error?


2X Rw  = Rwb @code0x00   in ideal?


The typical of Zero scale error means Rwb ?

Figure 39 looks 2XRw.


INL means difference from (2) ? or only (256-D)/256 ?

Your guide (The essential guide say to the Data conversion) says (256-D)/256 is ideal curve, I think.


And the typ full scale error is minus value.

Does it mean RWA(256) < RAB ?

Figure 39 looks Rs remain.