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ADF4356: Why is there a difference in the number of bits that can be set as MOD2 between the EV-board and ADIsimPLL?

Category: Software
Software Version: ADIsimPLL Version 5.50.04

I am wondering why the ADF4356 datasheet says [MOD2 is the programmable, 28-bit auxiliary fractional modulus (2 to 268,435,455).], but the ADIsim's MOD2 configuration allows only 14 bits of input (below).

Can anyone please share their wisdom?

Best regards,

Added part number to title and message body
[edited by: ggall at 9:22 AM (GMT -4) on 14 Apr 2023]