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參數(shù)資料
| 型號： | LC72144M |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | PLL Frequency Synthesizer(鎖相環(huán)頻率合成器) |
| 中文描述： | 鎖相環(huán)頻率合成器（鎖相環(huán)頻率合成器） |
| 文件頁數(shù)： | 19/22頁 |
| 文件大?。?/td> | 308K |
| 代理商： | LC72144M |
Charge Pump
When unlock is detected following a channel change, PDS (the sub-charge pump) operates. The value of R1 changes to
R1M // R1S (R1S
≈
100
), as shown in following figure, decreasing the low-pass filter time-constant and accelerating
PLL locking.
The unlock detection data UL1 must be set to 1. The unlock detection range will be set to ±0.5 μs or ±1 μs. If a phase
difference in excess of these values is detected the circuit will go to the unlock state and the sub-charge pump will
operate. When the circuit approaches the lock state and the phase difference falls under the unlock detection range, the
sub-charge pump operation will stop, i.e., the sub-charge pump will go to the high impedance state.
No. 5377-19/22
LC72144M
PDC1
PDC0
PDS (sub-charge pump state)
0
High impedance
1
0
Charge pump operates (when unlocked)
1
1
Charge pump operates (normal operation)
DLC
PD1, PD0, PDS
0
Normal operation
1
Forced to low
Pins DO and I/O-5
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LC72146 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:PLL Frequency Synthesizer for Electronic Tuning |
| LC72146M | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:PLL Frequency Synthesizer for Electronic Tuning |
| LC72146MA-AH | 功能描述:時鐘合成器/抖動清除器 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 |
| LC72146MHSQR-U-TRM-E | 制造商:Sony Semiconductor Solutions Division 功能描述: |
| LC72146V | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
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