MOSA
POP NOISE REDUCTION AS POWER-ON-OFF
MS6330
16-Bit Stereo Audio DAC & HP Driver with PD
It is effective to prevent the power-on-off pop noise by controlling /PD and PDPR pins. The better control timing is as
below. Please refer to the circuit diagram in the page 8.
VDD
PD
>100ms
>100ms
PDPR
>350ms
Music
Power-on sequence
Power-off sequence
In power-on sequence, the initial state of /PD is low and PDPR is high, and then PDPR sets low after the /PD sets high
at least 100ms. In power-off sequence, enable PDPR function and delay 100ms, and then sets low to /PD.
POWER DOWN SEQUENCE
The power down sequence is a power-save mode (V
DD
is on), the power down current of MS6330 is less than 1uA. The
control timing is as below.
PD
>100ms
Delay time
PDPR
>350ms
Music
Disable Power-down
Enable Power-down
The delay time is decided by the value of the bypass capacitor. It is 5second for 10uF bypass capacitance.
REV 1.0
7
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