ADN4624 HDMI reference design

Hi Larson,

We have not yet published a complete tested solution using ADN4624 to isolate HDMI, but I can refer you to our circuit note using ADN4654:

CN0422 Circuit Note | Analog Devices

Using ADN4624 will be similar but allowing higher bandwidth so that 1080p resolution is practical (or maybe half-frame rate 4K).

Some suggested optimizations of that circuit would be to only use the AC coupling capacitors on the outputs (don't place the 10k pull-up/pull-down resistors), and on the inputs, the pull-ups can be to the 1.8V VDD1 supply. The LVDS common mode biasing can be simplified, by omitting the 10k pull-up/pull-downs and instead splitting the termination resistor (connecting between two resistors to 1.8V). With this arrangement, it should be sufficient to terminate simply with 50 Ohm to 1.8V on Din+ and on Din-, after the AC coupling cap (with no pull-up before it).

Best regards,

Conal

Hi Conal

Based to your suggestion,attached schematic is right?

Hi Conal

Based to your suggestion,attached schematic is right?