VL-ADR-01 Reference Manual
2
Audio Signaling Characteristics
Table 1 lists the characteristics of the audio line-level signals on the audio jacks as well as the
auxiliary connector. For information on the audio characteristics of the PCM2906C codec, refer
to the following datasheet:
http://www.ti.com/product/PCM2906C
.
Table 1: Line-Level Signal Characteristics
Parameter
Description
Audio input signal level
2 Vp-p (typical)
Input Impedance
30 kΩ (typical)
Output voltage level
2 Vp-p (typical)
Minimum output load impedance
10 kΩ
Transient Voltage Suppression (TVS) Devices
The ADR-01 circuitry is protected from spike and surge damage by on-board Transient Voltage
Suppression (TVS) devices on the audio line input and audio line output signals. Figure 2
provides a schematic view of the connection of the TVS devices.
Figure 2. Schematic of TVS Circuitry
ADR01_02
TVS Devices
Ground
Audio Output Right Channel
Audio Output Left Channel
Audio Input Right Channel
Audio Input Left Channel
