參數(shù)資料
型號(hào)： LMX2370TMX/NOPB
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： PLL合成/DDS/VCOs
英文描述： PLL FREQUENCY SYNTHESIZER, 2500 MHz, PDSO20
封裝： PLASTIC, TSSOP-20
文件頁(yè)數(shù)： 1/25頁(yè)
文件大?。?/td> 577K
代理商： LMX2370TMX/NOPB
LMX2370
PLLatinum Dual Frequency Synthesizer for RF
Personal Communications
LMX2370
2.5 GHz/1.2 GHz
General Description
The LMX2370 monolithic, integrated dual frequency synthe-
sizer, including prescalers, is designed to be used as a first
and second local oscillator for dual mode or dual conversion
transceivers. It is fabricated using National’s 0.5u ABiCV
silicon BiCMOS process. The LMX2370 contains two dual
modulus prescalers. A 32/33 or a 16/17 prescaler can be
selected for the Main synthesizer and a 16/17 or 8/9 pres-
caler can be selected for the Aux synthesizer. Using a digital
phase locked loop technique, the LMX2370 generates very
stable, low noise control signals for UHF and VHF voltage
controlled oscillators (VCOs). Serial data is transferred into
the LMX2370 via a 1.8 V three wire interface (Data, Enable,
Clock) compatible with low voltage baseband processors.
Supply voltage can range from 2.7V to 5.5V. The LMX2370
features very low current consumption typically: - 6.0 mA at
3V.
The LMX2370 is available in a 24-pad chip scale (CSP),
24-pad thin chip scale (TCSP) or 20-pin TSSOP surface
mount plastic packages.
Features
n
2.7V–5.5V operation
n
Ultra low current consumption
n
Low phase detector noise floor
n
Low voltage MICROWIRE interface (1.8V up to V
CC)
n
Low prescaler values
32/33 at f
IN
≤ 2.5 GHz
16/17 at f
IN
≤ 1.2 GHz
n
Selectable charge pump current levels
n
Selectable FastLock mode
n
Enhanced ESD protection
n
Available in small 24-pad chip scale package (3.5 x 4.5
x 1.0 mm)
n
Available in small 24-pad chip thin scale package (3.5 x
4.5 x 0.8 mm)
Applications
n
Portable wireless communications (PCS/PCN, cordless)
n
Dual mode cellular telephone systems
n
Spread spectrum communication systems (CDMA)
n
Cable TV tuners (CATV)
Functional Block Diagram
10102604
FastLock, PLLatinum and MICROWIRE are trademarks of National Semiconductor Corporation.
TRI-STATE is a registered trademark of National Semiconductor Corporation.
November 2003
LMX2370
PLLatinum
Dual
Frequency
Synthesizer
for
RF
Personal
Communications
LMX2370
2.5
GHz/1.2
GHz
2003 National Semiconductor Corporation
DS101026
www.national.com
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PDF描述
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參數(shù)描述
LMX2371 制造商:未知廠家 制造商全稱:未知廠家 功能描述:
LMX2371 WAF 制造商:Texas Instruments 功能描述:
LMX2371SLBX 功能描述:IC FREQ SYNTH DUAL 24LAMINATECSP RoHS:否 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:*
LMX2371TM 功能描述:IC FREQ SYNTH DUAL 20-TSSOP RoHS:否 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:*
LMX2371TMX 功能描述:IC FREQ SYNTH DUAL 20-TSSOP 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:*
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