ΣSigmaStudio Ask AI Русский Log in

ADAU1452 how to split CLKOUT signal

SigmaDSP & SigmaStudio AntonG Oct 16, 2018 00:00 1 replies Original on forum ↗
Subscribe
AntonG Question
Oct 16, 2018 00:00

Hi,

I have a quick question. I want to connect 3 x DACs (PCM1798 from TI) to the DSP and was wondering, how can I split the Master Clock signal (from pin 23) to connect to all 3 DACs? I've noticed that ADAU1452 has 4 different CLKOUT settings (Lowest to Highest - from 2 to 15 mA @ IOVDD = 3.3V), so can I just use a single line to connect all 3 DACs in parallel? Do I need termination resistors to split the signal? If yes, then what resistance/CLKOUT level combination would work best?

Thank you.

Audio Signal Processors

adau1452

SigmaDSP Audio Processors

brightsky Reply
Oct 19, 2018 00:00

I used one of these https://www.mouser.com/ProductDetail/863-NB3N551DG, with 33 ohm resistors close to the clock outputs of the chip to eliminate signal reflection, though you are probably okay without it.