ML5805
FUNCTIONAL DESCRIPTION
Figure 1: ML5805 Block Diagram
The ML5805 is a single chip wireless digital transceiver. The ML5805 integrates all the frequency generation, receiver
and transmit functions requiring only a TR switch to form a complete 5.725 – 5.850GHz ISM band radio. The ML5805
is designed to transmit and receive 576kbps to 2.048Mbps signals using channels spaced from 1.728MHz to 4.096MHz
over the 5.725 – 5.850GHz ISM band.
RECEIVER
The ML5805 contains a dual conversion, low-IF receiver with all channel selectivity on-chip. The signal enters through a
differential LNA to the 1st mixer which down-converts the 5.8GHz input to a high 1st IF of 1.9GHz, followed by an image
reject 2nd mixer that brings this IF signal down to a low IF frequency. On chip IF filtering, gain and demodulation are
performed at; a 864KHz IF frequency for the 576kbps and 1.152Mbps data rate, a 1.024MHz IF frequency for the
1.536Mbps data rate or a 2.048MHz IF frequency for the 1.755Mbps and 2.048Mbps data rates.
No external filters or production tuning are required. A post detection filter and data slicer are also provided to complete
the receiver. The DATASEL pin allows selection between two different time constants in the data slicer. Rx clock
recovery is optionally performed for the 1.152Mbps, 1.536Mbps, 1.755Mpbs, 2.048Mbps data rate to aid those
applications using a simple microcontroller based MODEM. A receive signal strength indication (RSSI) signal is also
RF MICRO DEVICES®, RFMD®, OPTIMUM TECHNOLOGY MATCHING®, ENABLING WIRELESS CONNECTIVITY™, POWERSTAR®, POLARIS™ TOTAL RADIO™ ULTIMATEBLUE™ AND FASTWAVE™ ARE TRADEMARKS OF RFMD, LLC. BLUETOOTH IS A TRADEMARK OWNED BY
BLUETOOTH SIG, INC., U.S.A. AND LICENSED FOR USE BY RFMD. ALL OTHER TRADE NAMES, TRADEMARKS AND REGISTERED TRADEMARKS ARE THE PROPERTY OF THEIR RESPECTIVE OWNERS. ©2006, RF MICRO DEVICES, INC.
PRELIMINARY DATA SHEET
APRIL 2008
EDS-106041 REV P01
7628 THORNDIKE ROAD, GREENSBORO, NC 27409-9421 · FOR SALES OR TECHNICAL
REV A1 DS071026 SUPPORT, CONTACT RFMD AT (+1) 336-678-5570 OR SALES-SUPPORT@RFMD.COM
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