SSM2250RM View Datasheet(PDF) - Analog Devices

Part Name

Description

Manufacturer

SSM2250RM

Mono 1.5 W/Stereo 250 mW Power Amplifier

Analog Devices 

SSM2250

The AD1881 is an AC’97 Ver. 2.1 audio codec available from

Analog Devices. The stereo output from the AD1881 is coupled

into the SSM2250, which is used to drive a mono internal

speaker and stereo headphones. The internal speaker switching

is controlled by the SSM2250 through the normalizing pin on

the headphone jack. The AD1881 controls the shutdown pin on

the SSM2250, and is activated through the power management

software drivers installed on the computer.

AVDD = 5V

C6

C7

10␮F 0.1␮F

C2

10␮F

AVDD = 5V

C3

0.1␮F

For more information on the AD1881, the data sheet

can be downloaded from the Analog Devices web site at

http://www.analog.com.

AVDD = 5V

R2

100k⍀

NC

NC

R1

20k⍀

TO SPEAKER؊

SSM2250

TO SPEAKER+

1

14 NC

C1

100␮F

2

13

+

3

12

R3

1k⍀ NC

4

AVDD = 5V

11

C4

10␮F

5

10

+

C5

100␮F

6

9

+

7

8 NC

R4

1k⍀

R5

20k⍀

AC CLK

C8

22pF

C11

22pF

SDATA

OUT

Y1

24.576MHz

SMT

BITCLK

C20

27pF

R8

47⍀

SDATA

IN 0

SYNC

RST#

R10

10k⍀

PCBEEP

C23

0.1␮F

C22

1␮F

R11

1k⍀

MONO

PHONE

AUX

LEFT

R12

4.7k⍀

AUX IN

R16

4.7k⍀

NC

NC NC NC NC

NC NC NC

MONO OUT

48 47 46 45 44 43 42 41 40 39 38 37

C9

R6

20k⍀

1

36

1␮F

C10

2

35

1␮F

3

34

4

33

C14

5

32

1␮F

6

31

AD1881

7

30

R7

20k⍀

C12

0.1␮F

C15

1␮F

8

29

9

28

10

27

11

26

12

25

13 14 15 16 17 18 19 20 21 22 23 24

NC NC

NC

C24

1␮F

C26

1␮F

C27

1␮F

C21

0.1␮F

AVDD = 5V

C25

1␮F

C29

1␮F

R14

4.7k⍀

C31

1␮F

C30

1␮F

C32

1␮F

C28

0.001␮F

R15

4.7k⍀

R13

4.7k⍀

R17

4.7k⍀

NC = NO CONNECT

C33

R18

1␮F

4.7k⍀

R19

4.7k⍀

C13

0.047␮F

LINE OUT RIGHT

LINE OUT LEFT

C16

270pF

C17

270pF

C16

10␮F

C19

0.1␮F

R9

2k⍀

LINE IN RIGHT

LINE IN LEFT

MIC IN

CD RIGHT

CD GND

CD LEFT

Figure 18. PC 99 Compliant Audio System Reference Design

REV. 0

–9–

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