LMK04828: When does MAN_DAC writes update the DAC voltage

Simon Pack

Part Number: LMK04828

I am wishing to discipline a VCXO attached to the LMK04828 by writing to the 10-bit MAN_DAC register.

My question is when does the DAC update to the value written?

The MAN_DAC is split across 2 registers. Could there be a timing hazard between writing to the two registers that could cause a glitch on the DAC output voltage?

over 8 years ago

0 Timothy T over 8 years ago

TI__Mastermind 28550 points

The DAC will update its value for each register you program.

73,
Timothy

0 Simon Pack over 8 years ago in reply to Timothy T

Expert 1660 points

Thanks for the response. I have confirmed that this is the case.

It is not possible to update the DAC without causing glitches (e.g. when going from 0x1FF to 0x200) making it unsuitable for my requirements.

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LMK04828: When does MAN_DAC writes update the DAC voltage