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參數(shù)資料
| 型號(hào)： | AN12942B |
| 廠商： | PANASONIC CORP |
| 元件分類： | 消費(fèi)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)： | 15/31頁 |
| 文件大小： | 577K |
| 代理商： | AN12942B |
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15
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 signal input pin for signal
automatic detection. It is possible to
adjust in the direction lowers a gain by
adding external resistance.
The entry
impedance
:
About
20 k
Signal input for
signal automatic
detection
DC: 2.25 V
AC:
10 dBV
11
It is the output pin of the signal detection
system preamplifier.
The output
impedance
:
About
10
The signal
detection system
preamplifier
output pin
DC: 2.25 V
AC:
10 dBV
12
With the pin to fix the bias voltage (the
operation point) of the system which the
inner power supply (V
REG
) works, it
becomes 1/2 V
REG
(V). To remove noise,
it connects a condenser with the interval
of GND.
The entry
impedance
:
About
200 k
V
REF
DC: 2.25 V
18
It is the entry pin to enter beep signal.
The same signal is entered both by
L-channel and R-channel with the audio
signal mix amplifier of the following
paragraph.
The entry
impedance
:
About
180 k
Beep entry
DC: 2.25 V
AC:
3.3
V
PP
34
Impedance
Description
Inner circuit
Waveform
and voltage
Pin
No.
34
180
6.75k
V
REF
(2.25 V)
18k
360k
18
V
CC
(5 V)
440k
12
V
REG
(4.5 V)
11
20k
V
REF
(2.25 V)
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