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AD 9707 Power Supply

Question asked by Valemea on Jul 12, 2013
Latest reply on Apr 6, 2017 by larrywelchusa

I’m using  AD9707 with AVDD=1.8V, CLKVDD=2.5V and DVDD=3.3V power supply according to data sheet that, at pag. 30, states:

“The analog and digital sections of the AD9704/AD9705/AD9706/AD9707 have separate power supply inputs (AVDD and DVDD) that can operate independently over a 1.7 V to 3.6 V range”

Unfortunately, in my design, the AD9707 outputs current from AVDD corrupting the 1.8V supply and rising it up to 2.7V. I already checked that the 1.8V regulator works well with AD9707 disconnected.

Can you confirm that the AVDD,DVDD and CLKVDD  I’m using is correct?

Regards.

 

Valentino.

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