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AD8195 DP++ HDMI Problem

Question asked by j-r on Feb 25, 2016
Latest reply on Mar 14, 2016 by j-r

Hi All,

 

 

Using the datasheet for reference I made a PCB with only the AD8195. When the PCB is connected to a computer that has a HDMI output it works fine at resolution of 1920x1080.

 

The primary computer has a Nvidia Quadro graphics card with only Displayport outputs which works with the same monitor using a Displayport to HDMI cable. If the AD8195 is connected between the Nvidia Quadro and the monitor the computer recognizes the monitor but the monitor shows nothing.

 

 

Could this be a level shift problem with Displayport?

Problem is the same with preemphasis disabled or enabled.

3.3V is connected to VTTO, VTTI, Vref_Out and AVCC. 5v is connected to Vref_In.

Decoupling capacitors on all power pins.

 

 

Thanks,

Jeff

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