- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄384604 > LMX2350TM (NATIONAL SEMICONDUCTOR CORP) PLLatinum⑩ Fractional N RF / Integer N IF Dual Low Power Frequency Synthesizer PDF資料下載
參數(shù)資料
| 型號(hào)： | LMX2350TM |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | XO, clock |
| 英文描述： | PLLatinum⑩ Fractional N RF / Integer N IF Dual Low Power Frequency Synthesizer |
| 中文描述： | PLL FREQUENCY SYNTHESIZER, 2500 MHz, PDSO24 |
| 封裝： | PLASTIC, TSSOP-24 |
| 文件頁(yè)數(shù)： | 1/20頁(yè) |
| 文件大小： | 378K |
| 代理商： | LMX2350TM |
當(dāng)前第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)
LMX2350/LMX2352
PLLatinum
Fractional N RF / Integer N IF
Dual Low Power Frequency Synthesizer
LMX2350 2.5 GHz/550 MHz
LMX2352 1.2 GHz/550 MHz
General Description
The LMX2350/2352 is part of a family of monolithic inte-
grated fractional N/ Integer N frequency synthesizers de-
signed to be used in a local oscillator subsystem for a radio
transceiver. It is fabricated using National’s 0.5μ ABiC V sili-
con BiCMOS process. The LMX2350/2352 contains dual
modulus prescalers along with modulo 15 or 16 fractional
compensation circuitry in the RF divider. A 16/17 or 32/33
prescale ratio can be selected for the LMX2350, and the
LMX2352 provides 8/9 or 16/17 prescale ratios. The IF cir-
cuitry for both the LMX2350 and LMX2352 contains an 8/9
prescaler, and is fully programmable. Using a fractional N
phase locked loop technique, the LMX2350 /52 can gener-
ate very stable low noise control signals for UHF and VHF
voltage controlled oscillators (VCO’s).
For the RF PLL, a highly flexible 16 level programmable
charge pump supplies output current magnitudes from
100μA to 1.6mA. Two uncommitted CMOS outputs can be
used to provide external control signals, or configured to
FastLock
mode. Serial data is transferred into the
LMX2350/2352 via a three wire interface (Data, LE, Clock).
Supply voltage can range from 2.7 V to 5.5 V. The LMX2350/
2352 family features very low current consumption; typically
LMX2350 (2.5 GHz) 6.75 mA, LMX2352 (1.2 GHz) 5.00 mA
at 3.0V. The LMX2350/2352 are available in a 24-pin TSSOP
surface mount plastic package.
Features
n
2.7 V to 5.5 V operation
n
Low current consumption
LMX2350: Icc = 6.75mA typ at 3v
LMX2352: Icc = 5.00mA typ at 3v
n
Programmable or logical power down mode
Icc = 5 μA typ at 3v
n
Modulo 15 or 16 fractional RF N divider supports ratios
of 1, 2, 3, 4, 5, 8, 15, or 16
n
Programmable charge pump current levels
RF 100μA to 1.6mA in 100μA steps
IF 100μA or 800 μA
n
Digital filtered lock detect
Applications
n
Portable wireless communications (PCS/PCN, cordless)
n
Dual mode cellular telephone systems
n
Zero blind slot TDMA systems
n
Spread spectrum communication systems (CDMA)
n
Cable TV Tuners (CATV)
Block Diagram
FastLock
is a trademark of National Semiconductor Corporation.
MICROWIRE
is a trademark of National Semiconductor Corporation.
PLLatinum
is a trademark of National Semiconductor Corporation.
TRI-STATE
is a registered trademark of National Semiconductor Corporation.
DS100831-1
PRELIMINARY
June 1999
L
S
1999 National Semiconductor Corporation
DS100831
www.national.com
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LMX2352TM | CAP,CER,DISC,RAD,100PF,10%,1KV |
| LMX2470 | 2.6 GHz Delta-Sigma Fractional-N PLL with 800 MHz Integer-N PLL |
| LMX2470SLEX | 2.6 GHz Delta-Sigma Fractional-N PLL with 800 MHz Integer-N PLL |
| LMX2485 | 50 MHz - 3.0 GHz High Performance Delta-Sigma Low Power Dual PLLatinum⑩ Frequency Synthesizers with 800 MHz Integer PLL |
| LMX2485E | 50 MHz - 3.0 GHz High Performance Delta-Sigma Low Power Dual PLLatinum⑩ Frequency Synthesizers with 800 MHz Integer PLL |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMX2350TM/NOPB | 功能描述:IC FREQ SYNTHESIZER DUAL 24TSSOP RoHS:是 類別: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/無 電源電壓:2.375 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:* 封裝/外殼:* 供應(yīng)商設(shè)備封裝:* 包裝:* |
| LMX2350TMB | 制造商:Texas Instruments 功能描述: |
| LMX2350TMX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Serial-Input Frequency Synthesizer |
| LMX2350TMX/NOPB | 功能描述:IC FREQ SYNTH LOPWR DUAL 24TSSOP RoHS:是 類別: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/無 電源電壓:2.375 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:* 封裝/外殼:* 供應(yīng)商設(shè)備封裝:* 包裝:* |
| LMX2352 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。