3e audio SY-DAP 002 Series Manual - Página 13

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SY-DAPx002 UG

 Analog Input Sensitivity adjusting:

By default, the design setting on this product, compatible with most of the DAC

device including low level output from a cell phone, it takes 1Vrms input level for

a sensitive input to get rate output power. But in some case user keep using other

high level output DAC device and the output level is hard to adjust at some point,

then take this case into account, by changing a smaller setting in circuital will be a

good implementation for using higher level input device.

Below figure showing that by change 2 resistor (red marked) which are close to

DSP(U3) can adjust input sensitive level as you want.

Please refer to below function and a common table for reference:

RMS Input Voltage (V)

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Rev 1.0

R = (Rms Input Voltage) × 10KΩ - 2KΩ

Resistor Value (kΩ)

8.2(default)

Figure8: Input sensitivity resistor

Remark

1%; 0603 size