What's the best way to not used an analog input on the ADV7280?
That's the ordinary way:
that's what i want to do :
I'd go with the 1k resistor. All you are trying to do is pull the node to a rail to keep the noise down. Again this isn't a digital input where we need to pull the node hard enough so noise won't trip the hysteresis input on the pin.
Please refer below link, What to do with unused analog video input pins (Ain) on video decoders ?
I hope this would be more helpful.
Nobody answers this link.
I do not see any attached files.
Do I have a problem?
I'm looking for the best solution.
This is not a thread,its just FAQ Specialist comments,So we can use the unused analog input pins of video decoders can be any one of the below three connections for best solution.
1) left floating
2) connected via a resistor to ground.
3) connected directly to ground.
Thank you Poornima,
I would have preferred the best solution.
I never left an analog input left floating normally so i take the directly connected to ground solution.
I hope the consumption of this solution is good.
Analog video inputs are normally AC coupled and properly biased by the chip at the pin. So leaving it open doesn't hurt. It's not like a normal digital input which we'd pull high or low. Personally I'd pull the pin to ground via a resistor.
Thank you GuenterL,
A tip on the resistor value?
On your advice i'll put 75ohm because 75ohm impedance is required on the video link, but that not a good reason.
maybe a 1kohm is better...
Thanks a lot.
To conclude, only a 1kohm resistor to the ground for the unused analog input.
Retrieving data ...