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參數(shù)資料
| 型號： | LMX2364SLE |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 2600 MHz, QCC24 |
| 封裝： | MICRO, CSP-24 |
| 文件頁數(shù)： | 1/22頁 |
| 文件大?。?/td> | 258K |
| 代理商： | LMX2364SLE |
LMX2364
2.6 GHz Multimode RF Frequency Synthesizer with 850
MHz Integer-N IF Frequency Synthesizer
General Description
The LMX2364 integrates a high performance 2.6 GHz multi-
mode frequency synthesizer with a 850 MHz low power
Integer-N frequency synthesizer. Designed for use in a local
oscillator subsystem of a radio transceiver, the LMX2364
generates very stable, low noise control signals for UHF and
VHF voltage controlled oscillators. It is fabricated using Na-
tional’s high performance BiCMOS process.
The RF synthesizer supports several operating modes in-
cluding an Integer-N mode, a Fractional-N mode, and a
Dynamic Switching Mode. The Dynamic Switching Mode
allows the device to operate as a fractional-n synthesizer
during a user defined Fastlock period and then automatically
switches to an integer-n synthesizer for steady-state opera-
tion. The RF Synthesizer also contains a selectable, qua-
druple modulus prescaler along with modulo 1 - 128 frac-
tional compensation circuitry in the N divider. A flexible, 4
level programmable charge pump supplies output current
magnitudes ranging from 1 mA to 16 mA. Only a single word
write is required to power up and tune the synthesizer to a
new frequency.
High performance Fastlock technology makes the LMX2364
an excellent choice for applications requiring aggressive lock
time while maintaining excellent phase noise and spurious
performance. The combination of the improved Fastlock cir-
cuitry, the enhanced fractional compensation engine, the
programmable charge pump architecture, and Dynamic
Mode Switching technology gives the designer maximum
freedom to optimize the performance of the synthesizer for
the target application.
The IF synthesizer includes a fixed 8/9 dual modulus pres-
caler, a two level programmable charge pump, and dedi-
cated Fastlock circuitry w/ an integrated Time-out counter.
Serial data is transferred to the device via a three-wire
interface (DATA, LE, CLK). This low voltage logic interface
allows direct connection to 1.8 Volt and 3.0 Volt devices.
Supply voltages from 2.7 V to 5.5 V are supported. Indepen-
dent charge pump supplies for each synthesizer allows the
designer to optimize the bias level for the selected VCO. The
LMX2364 consumes 6.0 mA (typical) of current in integer
mode and 7.0 mA (typical) in fractional mode. The LMX2364
is available in a 24 Pin Ultra Thin CSP package and 24 Pin
TSSOP Package.
Features
n
RF Synthesizer supports both Fractional and Integer
Operating Modes
n
Pin Compatible upgrade for LMX2354
n
2.7 V to 5.5 V operation
n
Independent, programmable and logical power down
support
n
Fractional N divider supports fractional denominators
ranging from 1 through 128
n
Programmable charge pump current levels
RF: 4 level, 1 – 16 mA
IF: 2 level, 100/800 uA
n
Fastlock Technology w/ integrated timeout counters
n
Digital filtered & analog lock detect output
n
Fastlock Glitch Reduction Technology
n
Dynamic Mode Switching Technology
n
Enhanced Low Noise Fractional Compensation Engine
n
Low voltage programming interface allows direct
connection to 1.8V logic
Applications
n
Digital Cellular
n
GPRS
n
IS-136
n
GAIT
n
PDC
n
EDGE
n
CDMA
n
Zero blind slot TDMA systems
n
Cable TV Tuners (CATV)
PRELIMINARY
September 2002
LMX2364
2.6
GHz
Multimode
RF
Frequency
Synthesizer
with
850
MHz
Integer-N
IF
Frequency
Synthesizer
2002 National Semiconductor Corporation
DS200506
www.national.com
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| LMX2364SLEX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:2.6 GHz PLLatinum Fractional RF Frequency Synthesizer with 850 MHz Integer IF Frequency Synthesizer |
| LMX2364SLEX/NOPB | 功能描述:IC FREQ SYNTH 2.6GHZ 24LAMUCSP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(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:時鐘 輸出:時鐘 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:* |
| LMX2364TM | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:2.6 GHz PLLatinum Fractional RF Frequency Synthesizer with 850 MHz Integer IF Frequency Synthesizer |
| LMX2364TM/NOPB | 功能描述:IC FREQ SYNTH 2.6GHZ 24TSSOP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(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:時鐘 輸出:時鐘 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:* |
| LMX2364TMX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:2.6 GHz PLLatinum Fractional RF Frequency Synthesizer with 850 MHz Integer IF Frequency Synthesizer |
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