AT83SND2CMP3_14 datasheet(39/98 Pages) ATMEL

39 / 98 page

AT83SND2CMP3

7524D–MP3–07/07

Power Amplifier

High quality mono output is provided. The DAC output is connected through a buffer

stage to the input of the Audio Power Amplifier, using two coupling capacitors The

mono buffer stage also includes a mixer of the LINEL and LINER inputs as well as a dif-

ferential monaural auxiliary input (line level) which can be, for example, the output of a

voice CODEC output driver in mobile phones.

In the full power mode, the Power Amplifier is capable of driving an 8Ω Loudspeaker at

maximum power of 440mW, making it suitable as a handsfree speaker driver in Wire-

less Handset Application.

The Low Power Mode is designed to be switched from the handsfree mode to the nor-

mal earphone/speaker mode of a telephone handset.

The audio power amplifier is not internally protected against short-circuit. The user

should avoid any short-circuit on the load.

PA Features

• 0.44W on 8Ω Load

• Low Power Mode for Earphone

• Programmable Gain (-22 to +20 dB)

• Fully Differential Structure, Input and Output

Table 43. PA Gain

APAGAIN 3:0

Gain (db)

0000

-22

0001

0010

0011

0100

0101

0110

0111

1000

-1

1001

-4

1010

-7

1011

-10

1100

-13

1101

-16

1110

-19

1111

-22

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