LTC2157 Alternate Bit Polarity

Question

When testing the LTC2157-14 with ABP and randomizer turned on the MSB is inverted to what we expect. We have to invert the bit that is already being inverted. Is there a problem with the LTC2157 that isn't in the datasheet?

ClarenceMayott · Accepted Answer

Interesting. I've seen articles where using both ABP and randomizer yield the best results, especially with low level signals.

Figure 5. Noise floor with alternate bit polarity and data output randomizer enabled. 
 
 I would like to know if there is a problem with the IC or something just no documented in the datasheet.)

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LTC2157 Alternate Bit Polarity