TA2120FN – Stereo Headphone Amplifier
Pin
Name
Direction
Description
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1
DBB NF
→
headphone-amp
NF of DBB amplifier
2
ADD OUT
headphone-amp
→
output of ADD amplifier
3
RF IN
→
headphone-amp
terminal for ripple filter circuit
4
PWC
→
headphone-amp
center amplifier on/off switch (open = on)
5
VCC
+Α/2.7
positive supply voltage
6
B
headphone-amp
→
HP-socket
output of power amplifier
7
C
headphone-amp
→
HP-socket
output of center amplifier
8
A
headphone-amp
→
HP-socket
output of power amplifier
9
GND
GND
ground of power amplifier
10
MIX OUT
headphone-amp
→
output of power amplifier (mixed)
11
ALC IN
→
headphone-amp
input terminal for ALC detector circuit
12
ALC DET
→
headphone-amp
smoothing for ALC detection (GND = ALC off, open = ALC ON)
13
ATT
→
headphone-amp
power amplifier gain switch (open/VCC = ATT off, GND = ATT on)
14
IN A
→
headphone-amp
input of power amplifier
15
IN B
→
headphone-amp
input of power amplifier
16
GND
GND
ground of input stage in power amplifier
17
BEEP IN
µP
→
headphone-amp
input terminal for beep sound
18
MUTE TC
→
headphone-amp
terminal for mute smoothing
19
MUTE SW
CD10/µP
→
headphone-amp
power mute switch (GND/open = mute off, VCC = mute on)
20
POWER
→
headphone-amp
power switch (VCC = power on, GND/open = power off)
21
BIAS
headphone-amp
→
BIAS voltage
22
BIAS IN
→
headphone-amp
filter terminal for BIAS circuit
23
DBB SW
µP
→
headphone-amp
DBB on/off switch (open/VCC = DBB on, GND = DBB off)
24
DBB OUT
headphone-amp
→
Output of DBB amplifier (terminal for filter)
3-4
CS 46 669
