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AT83SND2CMP3B bảng dữ liệu(PDF) 99 Page - ATMEL Corporation

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4341F–MP3–03/06
AT8xC51SND2C/MP3B
Table 15-27.
PA Operating Mode
Table 15-28.
PA Low Power Mode
15.3
Audio Supplies and Start-up
In operating mode AUDVBAT (supply of the audio power amplifier) must be between 3.2V and
5,5V.
AUDVDD, HSVDD and VDD must be inferior or equal to AUDVBAT.
A typical application is AUDVBAT connected to a battery and AUDVDD, HSVDD and VDD sup-
plied by regulators.
AUDVBAT must be present at the same time or before AUDVDD, HSVDD and VDD.
AUDRST must be active low (0) until the voltages are not etablished and reach the proper
values.
To avoid noise issues, it is recommended to use ceramic decoupling capacitors for each supply
closed to the package. The track of the supplies must be optimized to minimize the resistance
especially on AUDVBAT where all the current from the power amplifier comes from.
Note:
Refer to the application diagram.
0110
5
0111
2
1000
-1
1001
-4
1010
-7
1011
-10
1100
-13
1101
-16
1110
-19
1111
-22
APAON
APAPRECH
Operating Mode
0
0
Stand-By
0
1
Input Capacitors Precharge
1
0
Active Mode
1
1
Forbidden State
APALP
Power Mode
0
Low power mode
1
High power mode



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