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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)： | 16/31頁 |
| 文件大?。?/td> | 577K |
| 代理商： | AN12942B |
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16
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.
It is the condenser connection pin of the
offset cancellation circuit to remove the
DC offset. As the principle, it composes
high pass filter by entry impedance “R”
and connection condenser “C”.
The entry
impedance
:
About
80 k
Offset
cancellation C
pin
DC : 2.25 V
13,
14,
46,
47
It is the pin which controls the operation
of the AGC circuit of the speaker output
for the clip prevention in on/off.
At the time of off , the AGC circuit does
not work.
"High" : AGC-on1
"Open" : AGC-on2
"Low" : AGC-off
The entry
impedance
:
About
76 k
AGC
on1/on2/off
control pin
DC:
8
It is the detection circuit to detect the
signal level of the AGC circuit of the
speaker output for the clip prevention. It
connects a condenser for the detection.
The entry
impedance:
Unsettled
AGC detection
pin
DC: 0 V
～
1 V
10
It is the pin which controls EVR for
speaker amplifier and Headphone
amplifier.
The holding range with control voltage
is 0 V to 3.3 V.
The entry
impedance
:
The
high impedance
EVR control for
SP and HP
DC:
V
19
Impedance
Description
Inner circuit
Waveform
and voltage
Pin
No.
80k
90
V
REG
(4.5 V)
10
8
V
REG
(4.5 V)
240k
40k
216k
96k
48k
120k
19
80k
80k
V
REG
(4 V)
Pin 13,
pin 14,
pin 46,
pin 47
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