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參數(shù)資料
| 型號(hào)： | LA1835 |
| 元件分類(lèi)： | 調(diào)諧器 |
| 英文描述： | 2-BAND, AUDIO TUNER, PDIP30 |
| 封裝： | SDIP-30 |
| 文件頁(yè)數(shù)： | 11/14頁(yè) |
| 文件大?。?/td> | 468K |
| 代理商： | LA1835 |
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Continued from preceding page.
No. 4159-6/14
LA1835
No.
Function
Voltage
Internal equivalent circuit
Note
10
11
12
13
14
15
16
17
18
19
VCC
AM/FM IF buffer output
Also functions as the
output control switch
(muting switch).
S-meter output
Also functions as the
AM SD sensitivity
adjustment.
AM narrow band
ceramic filter connection
Phase comparator low-
pass filter
(FM/AM switch)
Pilot detector low-pass
filter
(forced mono)
(VCO stop)
Post-amplifier left and
right outputs
Post-amplifier left and
right inputs
VCC
0
0.3 (FM)
0 (AM)
1.5
VCC – 1.4
(FM)
0 (AM)
VCC – 1.0
Vreg
A voltage of 1.3 V or higher turns on the post-
amplifier output muting. A voltage of 4.0 V or higher
turns on the IF buffer output.
The recommended control voltage for turning
muting on is 1.9 V.
The AM SD sensitivity can be adjusted with the
resistor inserted between this pin and ground.
Since the FM SD sensitivity is affected by this
resistor, the AM SD sensitivity must be adjusted
first.
Recommended narrow band ceramic filter: BFU450
C4N (Murata Mfg. Co., Ltd.)
The LA1835 switches to AM mode when this pin is
connected to ground.
If a current of 50 A or larger flows from this pin, the
LA1835 switches to mono mode.
The VCO is stopped if this pin is connected to
ground.
Output impedance: ro = 200
Pin 16: left output
Pin 17: right output
Inverting inputs, ri = 3.3 k
Pin 18: left input
Pin 19: right input
Continued on next page.
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