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)
1V
2V
3V
____________________________________________________________________________________________________________
Rev 1.0
R = (Rms Input Voltage) × 10KΩ - 2KΩ
Resistor Value (kΩ)
8.2(default)
Figure8: Input sensitivity resistor
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28
Remark
1%; 0603 size
1%; 0603 size
1%; 0603 size
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