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AD5258 datasheet shows how to calculate RWA and RWB. These AD5258 data sheet  max Rwb query

AD5258 data sheet rev.D Page 3, wrt temperature variation Total Wiper
resistance (Rwb) of max 350 code = 0x00 .  Please can you state where
this is obtained from.


For resistance tolerance  wrt temperature and Voltage variation. as specified
in the AD5258 data sheet Rev.D.

Figure 19 which do not correspond to table 1, Rwb.

Page 3, Table 1. Rwb is the Worst case scenario for max = 350 ohm. is from
worst case scenario from tested batch, silicon samples wrt the distribution
known as outlier, .