參數(shù)資料
型號(hào)： LMX2377USLBX
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類(lèi)： 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, PQCC24
封裝： PLASTIC, CSP-24
文件頁(yè)數(shù)： 39/44頁(yè)
文件大?。?/td> 3181K
代理商： LMX2377USLBX
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
www.national.com
39
相關(guān)PDF資料
PDF描述
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
LMX2502LQ1635 PLLatinum⑩ Frequency Synthesizer System with Integrated VCO
LMX2502LQX1635 PLLatinum⑩ Frequency Synthesizer System with Integrated VCO
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LMX2377USLEX 功能描述:IC FREQ SYNTH DUAL 20LAMUCSP RoHS:否 類(lèi)別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)鐘發(fā)生器，PLL，頻率合成器 系列:PLLatinum™ 標(biāo)準(zhǔn)包裝:39 系列:- 類(lèi)型:* PLL:帶旁路 輸入:時(shí)鐘 輸出:時(shí)鐘 電路數(shù):1 比率 - 輸入:輸出:1:10 差分 - 輸入:輸出:是/是 頻率 - 最大:170MHz 除法器/乘法器:無(wú)/無(wú) 電源電壓:2.375 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類(lèi)型:* 封裝/外殼:* 供應(yīng)商設(shè)備封裝:* 包裝:*
LMX2377UTM 功能描述:IC FREQ SYNTH DUAL 20TSSOP RoHS:否 類(lèi)別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)鐘發(fā)生器，PLL，頻率合成器 系列:PLLatinum™ 標(biāo)準(zhǔn)包裝:39 系列:- 類(lèi)型:* PLL:帶旁路 輸入:時(shí)鐘 輸出:時(shí)鐘 電路數(shù):1 比率 - 輸入:輸出:1:10 差分 - 輸入:輸出:是/是 頻率 - 最大:170MHz 除法器/乘法器:無(wú)/無(wú) 電源電壓:2.375 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類(lèi)型:* 封裝/外殼:* 供應(yīng)商設(shè)備封裝:* 包裝:*
LMX2377UTMX 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:PLLatinum⑩ Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications
LMX2410QM 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:RF/Baseband Circuit
LMX2411 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:Baseband Processor for Radio Communications
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