參數(shù)資料
型號(hào)： LC72131
廠商： Sanyo Electric Co.,Ltd.
英文描述： AM/FM PLL Frequency Synthesizers(AM/FM鎖相環(huán)頻率合成器)
中文描述： 調(diào)幅/調(diào)頻鎖相環(huán)頻率合成器（調(diào)幅/調(diào)頻鎖相環(huán)頻率合成器）
文件頁(yè)數(shù)： 17/23頁(yè)
文件大小： 405K
代理商： LC72131
2. IF Counter Operation
Before starting the IF count, the IF counter must be reset in advance by setting CTE in the serial data to 0.
The IF count is started by changing the CTE bit in the serial data from 0 to 1. The serial data is latched by the
LC72131 when the CE pin is dropped from high to low. The IF signal must be supplied to the IFIN pin in the period
between the point the CE pin goes low and the end of the wait time at the latest. Next, the value of the IF counter at
the end of the measurement period must be read out during the period that CTE is 1. This is because the IF counter is
reset when CTE is set to 0.
Note: When operating the IF counter, the control microprocessor must first check the state of the IF-IC SD (station
detect) signal and only after determining that the SD signal is present turn on IF buffer output and execute an
IF count operation. Autosearch techniques that use only the IF counter are not recommended, since it is
possible for IF buffer leakage output to cause incorrect stops at points where there is no station.
IFIN minimum input sensitivity standard
f (MHz)
Note: Values in parentheses are actual performance values presented as reference data.
No. 4921-17/23
LC72131, 72131M
IFS
0.4
≤
f < 0.5
40 mVrms
(0.1 to 3 mVrms)
0.5
≤
f < 8
8
≤
f
≤
12
40 mVrms
(1 to 10 mVrms)
1: Normal mode
40 mVrms
0: Degradation mode
70 mVrms
(10 to 15 mVrms)
70 mVrms
70 mVrms
(30 to 40 mVrms)
相關(guān)PDF資料
PDF描述
LC72132 AM/FM PLL Frequency Synthesizers(AM/FM鎖相環(huán)頻率合成器)
LC72133M PLL Frequency Synthesizer for Electronic Tuning(用于電子調(diào)諧的鎖相環(huán)頻率合成器)
LC72134M Dual PLL Frequency Synthesizer for FM Tuner Systems(用于FM調(diào)諧器的雙鎖相環(huán)頻率合成器)
LC72135M PLL Frequency Synthesizer for Electronic Tuning(用于電子調(diào)諧的鎖相環(huán)頻率合成器)
LC72136N PLL Frequency Synthesizer for Electronic Tuning(用于電子調(diào)諧的鎖相環(huán)頻率合成器)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LC72131D 制造商:Panasonic Industrial Company 功能描述:IC
LC72131K 制造商:SANYO 制造商全稱(chēng):Sanyo Semicon Device 功能描述:PLL Frequency Synthesizer
LC72131K_12 制造商:SANYO 制造商全稱(chēng):Sanyo Semicon Device 功能描述:PLL Frequency Synthesizer
LC72131KC-Z1 制造商:ON Semiconductor 功能描述:PLL FREQUENCY SYNTHESIZER - Bulk
LC72131KM 制造商:SANYO 制造商全稱(chēng):Sanyo Semicon Device 功能描述:PLL Frequency Synthesizer
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