ADV7184 Video Decoder Schematic

leo738 Question

Oct 8, 2009 00:00

Hello,

I have a question about the 'typical circuit connection' on page 111 of the ADV7184 data sheet.

On the schematic it shows the ELPF pin (near bottom right of chip) connected to 'PVDD' via two capacitors & a resistor. I'm a bit confused as to where this PVDD is. Is it the 1.8V supply near marked 'PVDD' near to the top of the chip? I've attached a jpeg diagram illustrating my references.

Many thanks,

Owen

Video Products

adv7184

schematic

Video Decoders

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FormerMember Reply

Oct 9, 2009 00:00

Owen,

connect it after the filter at the PVDD pin of the ADV7184

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leo738 Reply

Oct 10, 2009 00:00

Many thanks for that.

I've two other questions which I hope you can help with:

1. The power supply smoothing 33uF capacitors are shown as non-polarised but I'm having difficulty sourcing such large values. Is a polarised Tantalum capacitor a suitable alternative?

2. Should the ground of the RGB signals (i.e. pin 5, 9 & 13) from the SCART connector be connected directly to the same analogue ground as the ADV7184 chip and should the fast blanking ground (pin 18) be connected to digital ground?

Thanks,

Owen

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ADIApproved Reply

Nov 18, 2009 00:00

Hi Owen,

As the purpose of the EngineerZone is to provide forums for the support of Developers using ADI DSPs and related tools, you may be better to consult the Analog Devices Support page, via the link below, for details of the appropriate support contact for this part:

http://www.analog.com/support

regards,

Craig.

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EZAdministrator Reply

Aug 2, 2018 00:00

This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

Thank you,
EZ Admin

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