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AD9381 MCLK/SCLK

Question asked by omeraloni on Oct 17, 2010
Latest reply on Dec 13, 2010 by omeraloni

I'm trying to connect the AD9381 to a stereo DAC (CS4353) through I2S.

I can see SCLK, MCLK, LRCLK and SDATA, all in sync and fulfill I2S demands.

The problem is that the CS4353 requires for e.g. Fs=48kHz, SCLK=128*Fs and MCLK=256*Fs, but the AD9381 gives me 64*Fs and 128*Fs, respectively.

I'm trying to configure the analog PLL (reg 0x58) so that it will satisfy my requirements, but that also scales my Fs, which is not desired. Scaling is also in non-standard rates, e.g. 73kHz.

What's the correct way to adjust MCLK w/o scaling Fs?

 

Thanks.

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