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參數(shù)資料
| 型號(hào)： | LC72146 |
| 元件分類： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 40 MHz, PDIP24 |
| 封裝： | SDIP-24 |
| 文件頁數(shù)： | 9/22頁 |
| 文件大?。?/td> | 157K |
| 代理商： | LC72146 |
Charge Pump
The charge pump configuration is shown in Figure 9.
Figure 9 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 Figure 10, decreasing the low-pass filter time-constant and accelerating PLL
locking.
Figure 10 Charge Pump Connections
No. 4922-17/22
LC72146, 72146M, 72146V
PDC1
PDC0
PDS (sub-charge pump state)
0
—
High impedance
1
Charge pump operates (normal operation)
1
0
Charge pump operates (when unlocked)
DLC
PD1, PD0, PDS
0
Normal operation
1
Forced to low
PD1
PD0
A IN
PDS
R1S
DO, I/O-5 pin
PDC1
Unlock
Detector
and
Subcharge
Pump Cont.
Phase
Detector
Clock
fref
fvco/N
UL0
DZ0
DZ1
DLC
UL1
PDC0
R1S = 100
(typ)
(SUB)
(MAIN)
A OUT
PDO
PDS
R1S
R1M
V tune
VCC
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LC72146V | PLL FREQUENCY SYNTHESIZER, 40 MHz, PDSO24 |
| LC72146M | PLL FREQUENCY SYNTHESIZER, 40 MHz, PDSO24 |
| LC72147V | PLL FREQUENCY SYNTHESIZER, 180 MHz, PDSO24 |
| LC72148V | PLL FREQUENCY SYNTHESIZER, 40 MHz, PDSO24 |
| LC72191M | PLL FREQUENCY SYNTHESIZER, 40 MHz, PDSO24 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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(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 |
| 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: |
| LC72147V | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:PLL Frequency Synthesizer for Electronic Tuning in Car Audio Systems |
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