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参数资料
| 型号： | LC72146V |
| 元件分类： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 40 MHz, PDSO24 |
| 封装： | SSOP-24 |
| 文件页数： | 9/22页 |
| 文件大小： | 157K |
| 代理商： | LC72146V |
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
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LC72147V | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:PLL Frequency Synthesizer for Electronic Tuning in Car Audio Systems |
| LC72148V | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Electronic Tuning PLL Frequency Synthesizer for Car Stereo Systems |
| LC72148V-MPB-E | 制造商:ON Semiconductor 功能描述:PLL FREQUENCY SYNTHESIZER - Ammo Pack 制造商:ON Semiconductor 功能描述:Phase Locked Loops - PLL |
| LC72148V-TLM-E | 功能描述:时钟合成器/抖动清除器 RoHS:否 制造商:Skyworks Solutions, Inc. 输出端数量: 输出电平: 最大输出频率: 输入电平: 最大输入频率:6.1 GHz 电源电压-最大:3.3 V 电源电压-最小:2.7 V 封装 / 箱体:TSSOP-28 封装:Reel |
| LC7215 | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:MW/LW PLL Frequency Synthesizers |
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