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AD1974 Standalone Mode Clocking

Question asked by PeterTheRed on May 17, 2013
Latest reply on May 17, 2013 by PeterTheRed

Greetings,

 

I'm designing a board including a pair of AD1974 ADCs in an auxiliary capacity.  I'd like to use them in standalone mode with our existing clocks:

 

MCLK = 24.576MHz

BCK = 6.144MHz

LRCK = 96kHz

 

This puts MCLK at 256*fs. 

 

First, are these clock rates valid in standalone mode?  In the AD1974 datasheet, pg. 11 describes going to 128*fs for fs = 96kHz.  However, pg. 12 claims that standalone mode only supports 256*fs.

 

Second, how should the PLL filter be configured in this mode?

 

Thanks,

Peter

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