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Clock for multiple ADE7816 devices

Question asked by Graeme on Apr 6, 2013
Latest reply on Apr 14, 2013 by hmani

Hi,

 

I am using three ADE7816s in a design.  What are your recommendations for providing the 16.384MHz clock for these devices.  I could put a separate crystal on each individual device, however this doesn't seem too elegant from an engineering perspective.

 

I considered a standard xtal oscillator driving all three, however most of these devices have a max capacitive load of 30pF and the ADE7816 datasheet claims the typical input capacitance of the of CLKIN is 20pF, for a total of 60pF for three devices.

 

If I attach a crystal to the first ADE7816, how many other 7816s can the CLKOUT drive directly?

 

Thanks....

 

Graeme

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