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.
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 |
|
kΩ |
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 |