Copyright

 ANPEC Electronics Corp.

Rev. A.7 - Mar., 2003

APA4835

www.anpec.com.tw

6

Typical Application Circuit

Mo de

Con trol

Mu te

H P Sense

Volum e

Con trol

32 steps

Bee p

Detect

Pow er

M a nagem ent

C lick and Pop

Sup pression

Circuitry

Inte rnal g ain se lect

20K

Ω

20K

Ω

20K

Ω

10K

Ω

10K

Ω

- Le ft O u t

20K

Ω

20K

Ω

+ R ight O ut

- R ight O ut

0.0 68

20K

Ω

10K

Ω

20K

Ω

20K

Ω

10K

Ω

0.0 68

20K

Ω

20K

Ω

V

DD

GN D

Byp ass

Bia s

Left D ock

0.3 3

R ig ht In

0.3 3

20K

Ω

2 00K

Ω

2 00K

Ω

20K

Ω

Bee p In

+ L eft O u t

220

Pin

Ring

H ea dpho ne Ja ck

Sle eve

Con trol

Pin

Tip

1K

Ω

100K

Ω

T o C ontrol Pin on

H ea dpho ne Ja ck

1 00K

Ω

Rig ht

Aud io

Inp ut

Shu tdow n

V

DD

V

DD

D C Vol C ontro l

17

19

15

1K

Ω

To HP se nse

Circuit

220

+

+

18

28

26

25

24

2

22

1,8 ,14,20 ,23

0.1

0.1

0.1

6,1 6,27

9

10

11

12

7

3

21

V

DD

5

4

Mo de

13

20K

Ω

Left In

+

+

20K

Ω

Rig ht Do ck

R_var

r*= R _var/50

* Add a resistor to avoid volume control gain error at power on status. For the R_var with 10K

Ω variable resistor, the recommended

value of r is in range of 100~200

Ω.