APA2120/2121
Pin Function Description
Pin
Name
GND
PCBEN
HP/LINE
VOLUME
LOUT+
LLINEIN
LHPIN
PVDD
RBYPASS
LOUT-
LBYPASS
BYPASS
PC_BEEP
SE/BTL
ROUT-
CLK
VDD
RHPIN
ROUT+
SHUTDOWN
RLINEIN
No
1,12,
13,24
2
2
3
4
5
6
7,18
8
9
10
11
14
15
16
17
19
20
21
22
23
I/P
O/P
I/P
I/P
Config.
Description
Ground connection, Connected to thermal pad.
I/P
I/P
O/P
I/P
O/P
I/P
O/P
I/P
I/P
I/P
O/P
BEEP mode control input, active H, for APA2120 only
Multi-input selection input, headphone mode when held high, line-in
mode when held low for APA2121 only.
Input signal for internal volume gain setting.
Left channel positive output in BTL mode and SE mode.
Left channel line input terminal, selected when HP/LINE is held low.
Left channel headphone input terminal, selected when HP/LINE is
held high.
Supply voltage only for power amplifier.
Right channel bypass voltage.
Left channel negative output in BTL mode and high impedance in
SE mode.
Left channel bias voltage generator.
Bias voltage generator
PCBEP signal input
Output mode control input, high for SE output mode and low for
BTL mode.
Right channel negative output in BTL mode and high impedance in
SE mode.
Clock signal generator
Supply voltage for internal circuit excepting power amplifier.
Right channel headphone input terminal, selected when HP/LINE is
held high.
Right channel positive output in BTL mode and SE mode.
It will be into shutdown mode when pull low.
Right channel line input terminal, selected when HP/LINE is held
low.
Copyright
ANPEC Electronics Corp.
Rev. A.1 - Mar., 2003
6
www.anpec.com.tw
ANPEC [ ANPEC ELECTRONICS COROPRATION ]
