Comments are in reference to the LMX2594 datasheet identified as "SNAS696A –MARCH 2017–REVISED AUGUST 2017"
Table 2 refers to FRAC_ORDER but this field doesn't appear in the register map. Is this value set up by field MASH_ORDER in register R44?
Side note, MASH is not defined in the datasheet. Is this acronym readily known to RF engineers?
Section 7.5.1, step 4, refers to programming all registers. Is it necessary to write registers that have no user-programmable fields? What about registers whose reset default values are already acceptable?
Finally, I wanted to let you know about a few issues in Figure 37 and Table 26 that should be fixed next time you rev the datasheet. No help needed as the answers are already shown in Table 22.
- VCO_DACISET in Figure 37 is implied not to include bit [0], although Table 22 and Table 26 make it clear that it does.
- R17[13:11] are shown as a single bit
- R19[13:11] are shown as a single bit and could be misleading if the user doesn't check against Table 22 because these bits are shown with different values in Table 22.
- VCO_SEL_STRT_EN is absent from Table 26.
Regards,
David C