Help:synchronous of data and clock in mixed signal systems?

[justin]

In mixed signal systems, how to ensure the syncrhonous in exchanging data in the interface of Digital and Analog? e.g. the output data of ADC shoud be sent to digital, then I should send a synchronous clock, But how should I ensure it?Here the main concern is clock skew issue.
clock tree? but when digital part making the clock tree, it doesn't know the delay in analog wire.
or anything else?

 

[yibinhsieh]

Re: Help:synchronous of data and clock in mixed signal syste

In the ADC output, the analog designer can be requested to align the data output and clock output. You can request that the data output is aligned to positive edge of the clock or negative edge of clock. Also you can define the skew spec. The analog designer can be optimized the skew by carefully layout technique. I think it is a easy job for analog designer.

Yibin

 

[justin]

Re: Help:synchronous of data and clock in mixed signal syste

Thanks for your reply:
When the analog designer giving the synchronous data and clock, Can the digital designer using the same clock and data?
I means in our systems, we use pll for clock synthesizer, and the PLL gives the clock for analog and digital two clock? or just give analog clock?