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參數(shù)資料
| 型號： | LMX2377UTMX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | XO, clock |
| 英文描述： | PLLatinum⑩ Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications |
| 中文描述： | PLL FREQUENCY SYNTHESIZER, 2500 MHz, PDSO20 |
| 封裝： | PLASTIC, TSSOP-20 |
| 文件頁數(shù)： | 39/44頁 |
| 文件大?。?/td> | 3181K |
| 代理商： | LMX2377UTMX |
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2.0 Programming Description
(Continued)
2.6.2 PD_POL Main
The PD_POL Main bit is used to control the Main synthesizer’s phase detector polarity based on the VCO tuning characteristics.
MAIN SYNTHESIZER PHASE DETECTOR POLARITY
Main R[17]
Control Bit
Register Location
Description
Function
0
1
PD_POL Main
Main R[17]
Main Phase Detector
Polarity
Main VCO Negative
Tuning
Characteristics
Main VCO Positive
Tuning
Characteristics
Main VCO Characteristics
20022682
2.6.3 ID
o
Main
The ID
o
Main bit controls the Main synthesizer’s charge pump gain. Two current levels are available.
MAIN SYNTHESIZER CHARGE PUMP CURRENT GAIN
Main R[18]
Control Bit
Register Location
Description
Function
0
1
ID
o
Main
Main R[18]
Main Charge Pump
Current Gain
LOW
0.95 mA
HIGH
3.80 mA
2.6.4 TRI-STATE ID
o
Main
The TRI-STATE ID
o
Main bit allows the charge pump to be switched between a normal operating mode and a high impedance
output state. This happens asynchronously with the change in the TRI-STATE ID
o
Main bit.
Furthermore, the TRI-STATE ID
o
Main bit operates in conjuction with the PWDN Main bit to set a synchronous or an
asynchronous powerdown mode.
MAIN SYNTHESIZER CHARGE PUMP TRI-STATE CURRENT
Main R[19]
Control Bit
Register Location
Description
Function
0
1
TRI-STATE ID
o
Main
Main R[19]
Main Charge Pump
TRI-STATE Current
Main Charge Pump
Normal Operation
Main Charge Pump
Output in High
Impedance State
L
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相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LMX2377UTM | Enclosed Switches Series LS: Side Rotary with 1.5" to 3.5" Adjustable Length Lever; Nylon Roller; 1NC 1NO SPDT Snap Action, Double Break; 0.5 in - 14NPT conduit; Plug-in |
| LMX2377USLBX | PLLatinum⑩ Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications |
| LMX2377USLEX | POSITIONER |
| LMX2377U | PLLatinum⑩ Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications |
| LMX2471 | 3.6 GHz Delta-Sigma Fractional-N PLL with 1.7 GHz Integer-N PLL |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMX2410QM | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:RF/Baseband Circuit |
| LMX2411 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Baseband Processor for Radio Communications |
| LMX2411M | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:RF/Baseband Circuit |
| LMX2411MX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:RF/Baseband Circuit |
| LMX2430 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum Dual High Frequency Synthesizer for RF Personal Communications |
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