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參數(shù)資料
| 型號(hào)： | LC72121M |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | PLL Frequency Synthesizers for Electronic Tuning |
| 中文描述： | 鎖相環(huán)頻率合成器電子調(diào)諧 |
| 文件頁(yè)數(shù)： | 18/22頁(yè) |
| 文件大小： | 379K |
| 代理商： | LC72121M |
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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. 5815-18/22
LC72121, 72121M, 72121V
Locked state check
YES
NO
A10180
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LC72121MA | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:CMOS IC PLL Frequency Synthesizers for Electronic Tuning |
| LC72121MA-AH | 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 |
| LC72121MV | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| LC72121V | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:PLL Frequency Synthesizers for Electronic Tuning |
| LC72121V-D-MPB-E | 制造商:ON Semiconductor 功能描述:PLL FREQUENCY SYNTHESIZER - Ammo Pack |
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