Audio Inputs Electrical Specifications

There are 4 identical line-level analog Audio Input ports on the AUDIO connector.

Each port has two pins named AUD_INxx and GND respectively, where xx is a number ranging from 1 to 4.

The line-level audio signal is applied to the ADC input through a AC coupling capacitor.

U4H264PCI104AudioInputCircuit

Audio Input circuit

Audio Input - DC characteristics

Parameter

Min

Typ.

Max

Units

Input voltage range - Absolute max rating

-30

 

+30

V

Input impedance at 1 kHz

 

>4.7

 

For a correct operation of the audio decoder, the audio signal must satisfy the following electrical requirements:

Audio signal characteristics

Parameter

Min

Typ.

Max

Units

Audio level range

0.5

1.0

1.65

Vptp