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參數(shù)資料
| 型號： | LA3401 |
| 元件分類： | 接收器 |
| 英文描述： | AM/FM, AUDIO DEMODULATOR, PDIP22 |
| 封裝： | SDIP-22 |
| 文件頁數(shù)： | 13/15頁 |
| 文件大?。?/td> | 467K |
| 代理商： | LA3401 |
LA3401
No.1868-7/17
Note 1 : For C9, R11 setting, refer to Sample Application Circuit (Note 2) and Note 2 for Using IC.
Note 2 : To advance stereo operation start timing, the value of C10 is decreased. Decreasing the value of C10 narrows
capture range. This narrowing also depends on the value of C9. It is recommended to use C10 of 0.47
μF or
greater.
Pin Voltage, Name Remarks
Part No.
Voltage [V]
Pin Name
Remarks
1
3.3
AM input
Input resistor 20k
Ω
2
3.3
FM input
Input resistor 20k
Ω
3
3.3
Composite amplifier output
Output resistor 1k
Ω
4
3.3
Separation adjust
Output resistor 1k
Ω
5
3.3
Post amplifier output
L output
6
3.3
Post amplifier input
Minus input
7
3.3
Post amplifier input
Minus input
8
3.3
Post amplifiero output
R output
9
3.3
VCC-ON muting
10
-
FM/AM changeover
Input resistor 80k
Ω
11
-
Muting output
12
0
GND
13
-
Stereo indicator
Open collector
14
0 or 4.9
Changeover mute
Gnd through a capacitor of 0.01
μF or greater
15
-
Muting
Input resistor 80k
Ω
16
2.7
Pilot sync detect filter
17
2.7
Pilot sync detect filter, VCO stop
18
2.7
PLL input
19
2.7
Loop filte0r
20
2.7
Loop filter
21
-
OSC
4.2V
22
VCC
Power supply
2.5V
Note for Using IC
1. Ceramic resonator
(1) Shown below are ceramic resonators recommended for use in the LA3401.
Type No.
Supplier
CSB456F11
Murata
KBR-457HS
Kyocera
(2) By externally connecting a capacitor in parallel with a ceramic resonator, ceramic resonators shown below can be
also used.
Ceramic resonator
Parallel external capacitor
CSB456F10 (Murata)
20pF
KBR-457HS1 (Kyocera)
15pF
2. Capture range and PLL loop filter constants
(1) It is desirable that the capture range, which is related to the stereo distortion, should be set in the range where the
capture range does not depend on the pilot level. For example, when the PLL loop filter constants are C9 = 0.22
μF,
C10 = 1
μF, R11 = 3.3kΩ, the capture range characteristic becomes as shown in Fig. 1. For these loop filter
constants, it is desirable that the input pilot level should be approximately 20mV or greater where the capture range
does not depend on the pilot level. Figs. 2, 3 shows how the capture range characteristic changes with the loop filter
constants.
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| LA3410 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:VCO Non-Adjusting PLL FM MPX Stereo Demodulator with FM Accessories |
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