RoHS Compliance Information	Size in Kbytes	Date
LMX2315/LMX2320/LMX2325 PLLatinum™ Frequency Synthesizer for RF Personal Communications LMX2325 2.5 GHz LMX2320 2.0 GHz LMX2315 1.2 GHz	591 Kbytes	8-Jul-02	Download
LMX2315 Mil-Aero Datasheet MNLMX2315-X	132 Kbytes		Download

Obsolete Versions

General Description

The LMX2315/2320/2325's are high performance frequency synthesizers with integrated prescalers designed for RF operation up to 2.5 GHz. They are fabricated using National's ABiC IV BiCMOS process.

A 64/65 or a 128/129 divide ratio can be selected for the LMX2315 and LMX2320 RF synthesizer at input frequencies of up to 1.2 GHz and 2.0 GHz, while 32/33 and 64/65 divide ratios are available in the 2.5 GHz LMX2325. Using a proprietary digital phase locked loop technique, the LMX2315/2320/2325's linear phase detector characteristics can generate very stable, low noise signals for controlling a local oscillator.

Serial data is transferred into the LMX2320 and the LMX2325 via a three line MICROWIRE™ interface (Data, Enable, Clock). Supply voltage can range from 2.7V to 5.5V. The LMX2315, LMX2320 and the LMX2325 feature very low current consumption, typically 6 mA, 10 mA and 11 mA respectively.

The LMX2315, LMX2320 and the LMX2325 are available in a TSSOP 20-pin surface mount plastic package.

Design Tools

Title	Size in Kbytes	Date
PLL Codeloader Driver Software			View

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Application Notes

Title	Size in Kbytes	Date
AN-1001: Application Note 1001 An Analysis and Performance Evaluation of a Passive Filter Design Technique for Charge Pump PLL's	175 Kbytes	30-Jul-01	Download

More Application Notes

Title	Size in Kbytes	Date
AN-1879: Application Note 1879 Fractional N Frequency Synthesis	511 Kbytes	10-Dec-08	Download