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參數(shù)資料
| 型號： | AN12942B |
| 廠商： | PANASONIC CORP |
| 元件分類： | 消費家電 |
| 英文描述： | Audio signal processing IC for notebook PC |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO56 |
| 封裝： | 0.300 INCH, PLASTIC, HSOP-56 |
| 文件頁數(shù)： | 13/31頁 |
| 文件大?。?/td> | 577K |
| 代理商： | AN12942B |
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13
SDC00047AEB
AN12942B
Technical Data (continued)
Circuit diagrams of the input/output part and pin function descriptions (continued)
Note) The characteristics listed below are reference values based on the IC design and are not guaranteed.
We change an audio signal automatic
detection function in on/off. In case of
automatic detection off, it controls power
saving by speaker with the manual with
the power saving on/off pin.
High: Function on
Low: Function off
The entry
impedance
:
The
high impedance
Signal
automatic
detection
function
on/off control
pin
DC:
49
The entry
impedance
:
About
80 k
The output
impedance
:
Equal
to or less than
about 10
The entry
impedance
:
The
high impedance
The entry
impedance
:
About
18 k
Impedance
We change a noise removal function in
on/off.
High: Function on
Low: Function off
Switch B
Switch A
DC: 0 V
(at Open)
33
35
It is the output pin of BV
REF
.
Switch A-1
Switch A-2
Switch A-3
Switch B-1
Switch B-2
DC:
V
21,
22,
23,
24,
25
It is the input pin of BV
REF
.
BV
REF
DC:
V
20
It is the voice input pins of the speaker
amplifier. To make offset voltage in
power saving on/off changing by the
speaker amplifier little, it combines
capacity.
( It makes POP noise small ).
Pin 44: R-channel speaker entry
Pin 45: L-channel speaker entry
Speaker
amplifier entry
DC: 2.25 V
AC:
10 dBV
44,
45
Description
Inner circuit
Waveform
and voltage
Pin
No.
Pin 45,
pin 44
18k
V
(2.25 V)
49
V
(4.5 V)
8k
80k
220k
44k
8k
20
V
REG
(4.5 V)
V
REG
(4.5 V)
20
Pin 21,
pin 22,
pin 23,
pin 24,
pin 25
Pin 33,
pin 35
80k
250k
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