HFA3860B

HFA3860B Data Sheet July 1999 File Number 4594.1 Direct Sequence Spread Spectrum Baseband Processor The Harris HFA3860B Direct Sequence Spread Spectrum (DSSS) baseband processor is part of the PRISM® 2.4GHz radio chipset, and contains all the functions necessary for a full or half duplex packet baseband transceiver. ™ Features Complete DSSS Baseband Processor Processing Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . ≥10dB Programmable Data Rate. . . . . . . 1, 2, 5.5, and 11MBPS Ultra Small Package . . . . . . . . . . . . . . . . . . . 7 x 7 x 1mm Single Supply Operation (44MHz Max) . . . . 2.7V to 3.6V Modulation Methods . . DBPSK, DQPSK, CCK, and MBOK Supports Full or Half Duplex Operations On-Chip A/D Converters for I/Q Data (3-Bit, 22 MSPS) and RSSI (6-Bit) Backwards Compatible with HFA3824A, HFA3860A Supports Dual Antenna Diversity The HFA3860B has on-board A/Ds for analog I and Q inputs, for which the HFA3724/6 IF QMODEM is recommended. Differential phase shift keying modulation schemes DBPSK and DQPSK, with data scrambling capability, are available along with Complementary Code Keying and M-Ary Bi-Orthogonal Keying to provide a variety of data rates. Builtin flexibility allows the HFA3860B to be configured through a general purpose control bus, for a range of applications. A Receive Signal Strength Indicator (RSSI) monitoring function with on-board 6-bit A/D provides Clear Channel Assessment (CCA) to avoid data collisions and optimize...