I have a question about ADV7281-M.
IS there any specification about ANALOG input?
ADV7181D's datasheet have this...
But at ADV7281-M, only this.
I want to know the ADV7281-M's ADC range.
The 1.1V ADC input range is not included in the datasheet. We instead stated the analog video input range as we thought this would be more useful to customers.
Yes your calculation is correct a 1.47Vpp signal is attenuated by the 24 Ohm/ 51 Ohm voltage divider to 1Vpp before being input to the ADV728x.
We are checking with part specialist on this
See "video specifications" section of the ADV728x datasheets.
The ADC input range is 1.1Vpp at the analog input pin of the ADV728x however I advise not exceeding 1Vpp at the analog input pin.
Note however the input range is increased due to the external resistor divider circuits of the ADV728x. 1.47Vpp is possible in single ended mode and 4Vpp is possible in differential mode. See Input Networks section of the ADV728x datasheet for more information.
Senior Applications Engineer,
Analog Devices Inc.
Hi Robert !
Thank you for your reply!
I saw the VIDEO SPECIFICATIONS.
Can you tell me where "1.1V" written?
At the network section , it says
"This allows an input range to the ADV7281/ADV7281-M/ ADV7281-MA of up to 1.47 V p-p.".
So this means ADV7281-M can receive
1.47 * 51 / 75 = 1Vpp-max
Is my understanding correct?
Thank you for your answer.
I will answer to my customer that ADC range is 1Vpp and please read the network section.
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