AT83SND2CMP3 datasheet(39/97 Pages) ATMEL

39 / 97 page

AT83SND2CMP3

7524B–MP3–05/06

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 8

Ω 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 8

Ω 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

AT83SND2CMP3 Datasheet(PDF) 39 Page - ATMEL Corporation

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