參數(shù)資料
型號(hào)： LC72121V
廠商： Sanyo Electric Co.,Ltd.
英文描述： PLL Frequency Synthesizers for Electronic Tuning(用于電子調(diào)諧的鎖相環(huán)頻率合成器)
中文描述： 鎖相環(huán)頻率合成器電子調(diào)諧（用于電子調(diào)諧的鎖相環(huán)頻率合成器）
文件頁(yè)數(shù)： 18/23頁(yè)
文件大小： 375K
代理商： LC72121V
Figure 3 Combining with Software
Outputting the unlocked state data in the serial data
At the point of data output 1 in figure 3, the unlocked state data will indicate the unlocked state, since the VCO
frequency is not stable (locked) yet. In cases such as this, the application should wait at least one whole period and then
check again whether or not the frequency has stabilized with the data output 2 operation in the figure. Applications can
implement even more reliable recognition of the locked state by performing several more checks of the state and
requiring that the locked state be detected sequentially.
<Flowchart for Lock Detection>
Directly outputting the unlocked state to the DO pin
Since the unlocked state (high level when locked, low when unlocked) is output from the DO pin, applications can
check for the locked state by waiting at least two reference frequency periods after changing the divisor N. However, in
this case also, even more reliable recognition of the locked state can be achieved by performing several checks of the
state and requiring that the locked state be detected sequentially.
Wait at least 2 reference frequency periods.
Valid output data is acquired by using an interval of at
least one reference frequency period.
*
: Even more reliable recognition of the locked state
can be achieved by performing several checks of the
state and requiring that the locked state be detected
sequentially.
Divisor N changed (data input)
Data output (1)
Data output (2)
No. 5815-18/23
LC72121, 72121M, 72121V
Locked state check
*
YES
NO
A10180
相關(guān)PDF資料
PDF描述
LC72121 PLL Frequency Synthesizers for Electronic Tuning
LC72121M PLL Frequency Synthesizers for Electronic Tuning
LC72122V PLL Frequency Synthesizer for Portable Equipment Electronic Tuning
LC72130 AM/FM PLL Frequency Synthesizers(AM/FM鎖相環(huán)頻率合成器)
LC72131 AM/FM PLL Frequency Synthesizers(AM/FM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
LC72121V-D-MPB-E 制造商:ON Semiconductor 功能描述:PLL FREQUENCY SYNTHESIZER - Ammo Pack
LC72121V-D-TLM-E 制造商:ON Semiconductor 功能描述:PLL FREQUENCY SYNTHESIZER - Tape and Reel
LC72121V-TLM-E 功能描述:時(shí)鐘合成器/抖動(dòng)清除器 RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel
LC72122V 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:PLL Frequency Synthesizer for Portable Equipment Electronic Tuning
LC72122V-MPB-E 制造商:ON Semiconductor 功能描述:PLL FREQUENCY SYNTHESIZER - Ammo Pack
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