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參數(shù)資料
| 型號(hào)： | LA1780 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Single-Chip Tuner IC for Car Radios |
| 中文描述： | 單芯片調(diào)諧器IC的汽車收音機(jī) |
| 文件頁(yè)數(shù)： | 14/38頁(yè) |
| 文件大小： | 764K |
| 代理商： | LA1780 |
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No. 5724-14/38
LA1780M
Pin No.
Function
Description
Equivalent circuit
Comparator
Quadrature
detector
IF limiter amplifier
Band
muting
Comparator
S-meter
S-meter
Continued from preceding page.
Continued on next page.
The resistor R
1
determines the
width of the band muting function.
Increasing the value of R
1
narrows the band.
Reducing the value of R
1
widens
the band.
34
35
36
37
AGC
QD output
QD input
V
REF
Null voltage
When tuned, the voltage between
pins 34 and 37, V
34 – 37
, will be 0 V.
The band muting function turns
on when |V
34 – 37
|
≥
0.7 V.
V
37
= 4.9 V
A 130-μA current flows from pin
38 and, in conjunction with the
external resistance R, determines
the comparison voltage.
38
FM SD ADJ
The keyed AGC operates when
the voltage created by dividing the
pin 24 S-meter output voltage by
the 6.4 and 3.6 k
resistors
becomes lower than the voltage
determined by the resistor
between pin 39 and ground.
39
Keyed AGC
AM stereo buffer
This pin also is used as the AM
stereo IF buffer pin.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LA1780M | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Single-Chip Tuner IC for Car Radios |
| LA1780MA-A-MPB-E | 制造商:ON Semiconductor 功能描述:ANALOG CAR RADIO TUNER - Trays 制造商:Rochester Electronics LLC 功能描述: 制造商:ON Semiconductor 功能描述:FTRAY - ANALOG CAR RADIO TUNER |
| LA1781M | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:For Car Radios Single-Chip Tuner IC |
| LA1781M_09 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:For Car Radios Single-Chip Tuner IC |
| LA1781MA-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: |
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