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ADV9887A technical question

Question asked by ap00 on Apr 19, 2013
Latest reply on Apr 19, 2013 by ap00

Customer question



  1. We’ve been using the Analog Devices AD9887A video chip for some time now and for some reason we’ve been using 25V caps for the 0.0039uF and the 0.039uF PLL Loop-Filter caps.  The PVD supply voltage is only 3.3V but we’re not sure what the FILT input pin does since there is mention of a charge pump.  We’d like to use smaller physical size caps in a new design and we’d like to know how low in voltage we can go in specifying these 2 caps.  Please advise