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AN12945A Datasheet - Page 12

Download or read online Panasonic Corporation AN12945A Monophonic Audio Power IC With Built-in AGC pdf datasheet.
Also see for AN12945A: Datasheet #2 (5 pages)



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AN12945A
Technical Data (continued)
I/O block circuit diagrams and pin function descriptions (continued)
Note) The characteristics listed below are reference values based on the IC design and are not guaranteed.
Pin
Waveform
No.
and voltage
GND
3
19
DC 0.0 V
AGC amplifier
output terminal
20
DC 1.5 V
AC –16 dBV
Speaker
amplifier input
1
1
DC 1.5 V
AC –16 dBV
V
(1.5 V)
REF
AGC detection
terminal
2
2
DC 0 V to 1 V
Internal circuit
Impedance
V
(3.0 V)
REG
The output
impedance
equal to or less
20
90
Εntry impedance
50k
= About 50 kΩ
V
(3.0 V)
REG
1.8k
Εntry impedance
= Unsettled
144k
SDF00041BEB
Description
It is the GND terminal of the signal
system.
It is connected with the substrate
potential of the IC.
It is the output terminal of the AGC
circuit to hold an output clip in
excessive output of the SP output.
than 10 Ω
It is the voice input terminal of the
speaker amplifier.
To make offset voltage in power saving
On/Off changing by the SP amplifier
little , it combines capacity.
(It makes POP noise small.)
It is the detection circuit to detect the
signal level of the AGC circuit of the SP
output for the clip prevention.
It connects a condenser for the detection.
12

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