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参数资料
| 型号： | LC72121M |
| 元件分类： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 160 MHz, PDSO24 |
| 封装： | MFP-24 |
| 文件页数： | 8/23页 |
| 文件大小： | 377K |
| 代理商： | LC72121M |
IF Counter Operation
Applications must first, before starting an IF count operation reset the IF counter by setting CTE in the serial data to 0.
The IF counter operation is started setting CTE in the serial data from 0 to 1. Although the serial data is latched by
dropping the CE pin from high to low, the IF signal input to the IFIN pin must be provided within the wait time from the
point CE goes low. Next, the readout of the IF counter after measurement is complete must be performed while CTE is
still 1, since the counter will be reset if CTE is set to 0.
Note: If IF counting is used, applications must determine whether or not the IF IC SD (station detect) signal is present in
the microcontroller software, and perform the IF count only if that signal is asserted. This is because auto-search
techniques that use IF counting only are subject to incorrect stopping at points where there is no station due to IF
buffer leakage.
Note that the LC72121 input sensitivity can be controlled with the IFS bit in the serial data.
Reduced sensitivity mode (IFS = 0) must be selected when this IC is used in conjunction with an IF IC that does
not provide an SD output and auto-search is implemented using only IF counting.
IFIN Minimum Sensitivity Standard
No. 5815-16/23
LC72121, 72121M, 72121V
IFS data
0.4
≤ f < 0.5
0.5
≤ f < 8
8
≤ f ≤ 15
1(Normal mode)
40 mVrms (0.1 to 3 mVrms)
40 mVrms
40 mVrms (1 to 15 mVrms)
0 (Degraded sensitivity mode)
70 mVrms (5 to 10 mVrms)
70 mVrms
70 Vrms (30 to 40 mVrms)
Input frequency : f [MHz]
Note: Values in parentheses are actual performance values that are provided for reference purposes.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LC72121MA | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:CMOS IC PLL Frequency Synthesizers for Electronic Tuning |
| LC72121MA-AH | 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 |
| LC72121MV | 制造商:未知厂家 制造商全称:未知厂家 功能描述: |
| LC72121V | 制造商:SANYO 制造商全称: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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