AD8194

Rev. 0 | Page 14 of 16

Evaluation Board

The AD8194 evaluation board illustrates one way to implement

a 2:1 HDMI link switch with an AD8194 and a CMOS switch.

The AD8194 evaluation board deviates from a typical

application in that it uses an HDMI connector for the output as

well as for the inputs. This setup makes it easy to connect

equipment to the AD8194 evaluation board with standard

HDMI cables. However, this arrangement requires crossing over

the TMDS signals on the output side (see Figure 24).

In a typical application, the output of the AD8194 is routed

directly into an HDMI receiver. Because a receiver is generally

designed to interface directly to an HDMI input connector, it is

not necessary to cross over the TMDS signals in a typical

application (see Figure 25).

CROSSOVER

REQUIRED

HDMI

CONNECTOR

1

19

19

AD8194

HDMI

CONNECTOR

1

1

19

HDMI

CONNECTOR

Figure 24. Block Diagram of AD8194 Evaluation Board Showing Output Crossover

HDMI

CONNECTOR

HDMI

RECEIVER

1

19

AD8194

Figure 25. HDMI Signals to HDMI Receiver, No Crossover Required