LMX2330A数据手册集成电路（IC）的时钟发生器PLL频率合成器规格书PDF

描述 Description

LMX2330A 2.5 GHz/510 MHz
LMX2331A 2.0 GHz/510 MHz
LMX2332A 1.2 GHz/510 MHz
General Description
The LMX233xA family of monolithic, integrated dual frequency synthesizers, including prescalers, is to be used as a local oscillator for RF and first IF of a dual conversion transceiver. It is fabricated using National’s ABiC IV silicon BiCMOS process.
The LMX233xA contains dual modulus prescalers. A 64/65 or a 128/129 prescaler (32/33 or 64/65 in the 2.5 GHz LMX2330A) can be selected for the RF synthesizer and a 8/9 or a 16/17 prescaler can be selected for the IF synthesizer. LMX233XA, which employs a digital phase locked loop technique, combined with a high quality reference oscillator and loop filters, provides the tuning voltages for voltage controlled oscillators to generate very stable low noise RF and IF local oscillator signals. Serial data is transferred into the LMX233xA via a three wire interface (Data, Enable, Clock). Supply voltage can range from 2.7V to 5.5V. The LMX233xA family features very low current consumption; LMX2330A — 13 mA at 3V, LMX2331A — 12 mA at 3V, LMX2332A — 8 mA at 3V.

特性 Features

■ 2.7V to 5.5V operation
■ Low current consumption
■ Selectable powerdown mode: ICC = 1 µA typical at 3V
■ Dual modulus prescaler:
   LMX2330A (RF) 32/33 or 64/65
   LMX2331A/32A (RF) 64/65 or 128/129
   LMX2330A/31A/32A (IF) 8/9 or 16/17
■ Selectable charge pump TRI-STATE® mode
■ Selectable FastLock™ mode
■ Small outline, plastic, surface mount TSSOP 0.173\" wide package
Applications
■ Portable Wireless Communications (PCS/PCN, cordless)
■ Cordless and cellular telephone systems
■ Wireless Local Area Networks (WLANs)
■ Cable TV tuners (CATV)
Other wireless communication systems

应用 Application

■ Portable Wireless Communications (PCS/PCN, cordless)
■ Cordless and cellular telephone systems
■ Wireless Local Area Networks (WLANs)
■ Cable TV tuners (CATV)
Other wireless communication systems