Analog Input Muxing; Analog Input Routing Recommendation; Figure 9: Video Input Signal Level Prior To 24 Ohm To 51 Ohm Resistor Divider; Figure 10: Video Input Signal Level After Voltage Clamps - Analog Devices Advantiv ADV7604 Hardware Manual

Figure 9: Video Input Signal Level Prior to 24 Ohm to 51 Ohm Resistor Divider

730mV
6.3

Analog Input Muxing

The ADV7604 has twelve analog input pins, Ain1 to Ain12. In order to process the video signals
that appear on the analog inputs, a multiplexer is required to route the signals to the three ADCs.

6.3.1 Analog Input Routing Recommendation

It is recommended to perform the following routing:
• RGB Graphics − Ain 7, 8, 9
• Component 1 − Ain10, 11, 12
• Component 2 − Ain 4, 5, 6
• SCART (RGB) − Ain 1, 2, 3
Refer to the ADV7604 Evaluation Board for the recommended board layout.
Rev. F August 2010
Y Input Signal Range
1.6V
~1V
Y Signal Range
1.345 V
~0.5V
{
830mV
0.615 V

Figure 10: Video Input Signal Level After Voltage Clamps

Pr/Pb Input Signal Range
1.6V
Pr/Pb Signal Range
Clamp 730mV
Level
66
~1V
1.345 V
~0.5V
{
Clamp
980mV
Level
0.615 V
ADV7604