National LMX2470 Data Sheet
Summary
The LMX2470 is a high-performance, low-power Delta-Sigma Fractional-N PLL designed for advanced wireless communications and fine frequency resolution applications. Ideal for manufacturers of cellular base stations, satellite tuners, and complex telecom systems (supporting standards like CDMA, WCDMA, and GSM/GPRS). This manual provides comprehensive technical specifications, including detailed pin descriptions for the 24-Pin CSP package, functional block diagrams, operating parameters, and application guidelines necessary for seamless system integration.
Manual Details
| Brand | National |
|---|---|
| Pages | 36 |
| File Size | 433.87 KB |
| Published | June 01, 2026 |
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Frequently Asked Questions
What are the required voltage ranges for the RF and IF power supplies?
Both VccRF and VccIF must be equal, with an input voltage range of 2.25V to 2.75V.
Which method does the LMX2470 use to reduce digital spurs at lower frequencies?
It uses enhanced anti-cycle slip fastlock circuitry combined with noise shaping and low-pass filtering techniques.
How is serial data transferred into the device's counters?
Serial data is transferred via a three-line MICROWIRE interface consisting of the CLK, DATA, and LE pins.