Why is the minimum Input Frequency for the Single-Ended Mode REF1 and REF2 AC-Coupled only 20MHz?

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Accepted Answer

Question Why is the Input Frequency Minimum for the Single-Ended Mode REF1 and REF2 
 AC-Coupled only 20MHz? Is this because off the automatic reference switchover 
 feature? Answer The issue with low input frequencies has more to do with AC-coupling than the 
 part itself. You could input 10kHz AC-coupled if you want to use 10uF 
 decoupling caps.
 The input slew rate also affects the performance. However, if it’s a nice 10kHz 
 square wave, with huge decoupling caps, it’ll work fine.

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