APA4838 Datasheet, PDF (7/29 Pages) Anpec Electronics Coropration – Stereo 2.8W Audio Power Amplifier with DC Volume Control and Selectable Gain

APA4838
Typical Application Circuit
V_DD
R_var
V_DD
1 µF
DC Vol Control
V_DD
100KΩ
HP Sense
Internal gain select
3
7
100KΩ
To Control Pin on
21
Headphone Jack
Mute ⁵
Mode ⁴
13
Left Dock
Left
Audio
Input
20KΩ
200KΩ
Beep In
20KΩ
Left In
12
+
0.33µF
11
Right
Audio
Input
200KΩ
20KΩ
Right In
10
+
0.33µF
20KΩ
9
Right Dock
Mode
Control
Beep
Detect
Volume
Bias Control
31 steps
V_DD
6,16,27
1,8,14,20,23
GND Bypass
22
0.1µF 0.1µF 0.1µF
2.2µF
Power
Management
Click and Pop
Suppression
Circuitry
2
20KΩ
19
20KΩ
18
10KΩ
10KΩ
20KΩ
0.068µF
10KΩ
- Left Out
17
+
20KΩ
Bias
20KΩ
220µF
1KΩ
Control Pin
Pin Ring
15 _{+ Left Out}
To HP sense
Circuit
28
+ Right Out
Sleeve
Tip
20KΩ
20KΩ
26
10KΩ
- Right Out
Headphone Jack
+
220µF
1KΩ
20KΩ
0.068µF
24
25
Shutdown
20KΩ
20KΩ
Copyright  ANPEC Electronics Corp.
7
Rev. A.1 - Apr., 2003
www.anpec.com.tw