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ELECTRICAL SPECIFICATIONS of digital outputs of ADV7282-M.

Question asked by Tamu on Jun 1, 2015
Latest reply on Jun 10, 2015 by Rob.Analog

Hello,

 

I have questions about ELECTRICAL SPECIFICATIONS of digital output of ADV7282-M.

My customer uses INTRQ pin as "Drive high when active" (INTRQ_OP_SEL[1:0]="10").
In this case, we think the ELECTRICAL SPECIFICATION is as follows:

DIGITAL OUTPUTS
Output High Voltage VOH = min 2.4V
Condition : DVDDIO = 3.3 V, ISOURCE = 0.4 mA
(from Datasheet P.4)

 

I have questions about ELECTRICAL SPECIFICATIONS in this case.

 

Question 1:
The condition is DVDDIO = 3.3 V.

When DVDDIO voltage slightly goes down, does the output voltage slightly go down, too?
For example, when DVDDIO voltage is 3.2V, does Voh min become about 2.3V (2.4-0.1)?

 

Question 2:
The condition is ISOURCE = 0.4 mA.

When the value of source current goes down, does the output voltage goes up?
For example, when DVDDIO voltage is 3.3V and Isource=0.2mA, does Voh min become about 2.85V ?

 

Question 3:
If question 1 and question 2 is yes, how much is the value of Isource which Voh min can be 2.5V with DVDDIO = 3.2 V ?

 

Of course you don't have to guarantee these.
We want your opinion as reference.

 

Background:
My customer uses ADV7282-M with DVDDIO = 3.3 V.
But the lower limit of the power is 3.2V.
He thinks Voh does not go down to 2.4V if Isource is below 0.4mA.
What do you think?

 

Thank you!
Best regards.

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