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參數(shù)資料
| 型號： | LA1776M |
| 元件分類： | 調(diào)諧器 |
| 英文描述： | 2-BAND, AUDIO TUNER, PQFP64 |
| 封裝： | 14 X 14 MM, QFP-64 |
| 文件頁數(shù)： | 21/41頁 |
| 文件大?。?/td> | 547K |
| 代理商： | LA1776M |
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4-3. FM Muting Function Control (pin 44: soft muting) and Attenuation Setting (pin 58)
The -3 dB limiting sensitivity can be adjusted by changing the value of R44.
The muting attenuation can be switched between three levels (-10, -20, and -30 dB) with R58.
5. AM Block
The LA1776M adopts an upconversion method.
5-1. AM AGC System
The RF AGC pickup operates according to the input level on pins 48 and 49.
Pin 48: AGC based on the components in the 10.7 MHz CF band.
Pin 49: Wideband AGC (The level at which the wideband AGC turns on can be adjusted with Rw.)
(The seek mode wideband AGC on level is increased by 10 dB.)
No.8085-28/41
LA1776M
Output level
When R44 is large
When R44
is small
V33
Output level
R58:OPEN
R58:200K
R58:30K
R58
Mute ATT
OPEN
–10 dB
200 K
–20 dB
30 K
–30 dB
The RF AGC is picked up from two places.
1. The wideband AGC determined by RW.
2. Midband AGC picked up from the second mixer at pin 49.
Operating bandwidth: 150 to 180 kHz (the 10.7 MHz CF
bandwidth)
62
49
56
57
RF
52
31
47
45
42
RW
1st MIX
10.7 MHz CF
49
10.7 MHz
2nd MIX
450 kHz CF
IF Amp.
DET
AM AGC SYSTEM
1st OSC
X'tal
Middle AGC IN
Wide AGC IN
ANT
DUMPING
RF AGC
22
F
3.3
F
1
F
IF AGC
1
F
VCC
+
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|---|---|
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| LA1781M | AM/FM, AUDIO SINGLE CHIP RECEIVER, PQFP64 |
| LA1784M | AM/FM, AUDIO SINGLE CHIP RECEIVER, PQFP64 |
| LA1787NM | AM/FM, AUDIO SINGLE CHIP RECEIVER, PQFP64 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LA1776M_09 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Single-Chip Tuner IC for Car Radios |
| LA1776M-MPB-E | 功能描述:調(diào)諧器 RoHS:否 制造商:NXP Semiconductors 功能: 噪聲系數(shù): 工作電源電壓: 最小工作溫度: 最大工作溫度: |
| LA177B/HG-2 | 制造商:LIGITEK 制造商全稱:LIGITEK electronics co., ltd. 功能描述:LED ARRAY |
| LA177B-1-SRG | 制造商:LIGITEK 制造商全稱:LIGITEK electronics co., ltd. 功能描述:LED ARRAY |
| LA177B-HG-2 | 制造商:LIGITEK 制造商全稱:LIGITEK electronics co., ltd. 功能描述:LED ARRAY |
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