Does every power supply pin of the ADV7842 chip need decoupling capacitor? I ask this, because after having a look at the Evaluation Board design I didn't find them at every VDD (AVDD, CVDD and so on) pin.
Every pin doesn't need a cap. When 2 power rail pins are right next to each other you only need one cap or a 10nF +100nF combination for the 2 pins. The final number of caps depends on layout and how the power planes are brought in. The goal is to get good decoupling across all the power pins without using to many caps.
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