HFA3861

HFA3861 ADVANCE INFORMATION Data Sheet July 1999 File Number 4699.1 Direct Sequence Spread Spectrum Baseband Processor The Intersil HFA3861 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 . . . . . . . . . . . . . . . . . . . . FCC Compliant Programmable Data Rate. . . . . . . . 1, 2, 5.5, and 11Mbps Ultra Small Package . . . . . . . . . . . . . . . . . . . . . 10 x 10mm Single Supply Operation (44MHz Max) . . . . . 2.7V to 3.6V Modulation Methods . . . . . . . . DBPSK, DQPSK, and CCK Supports Full or Half Duplex Operations On-Chip A/D and D/A Converters for I/Q Data (6-Bit, 22MSPS), AGC, and Adaptive Power Control (7-Bit) Targeted for Multipath Delay Spreads ~100ns Supports Short Preamble Acquisition The HFA3861 has on-board A/D’s for analog I and Q inputs and outputs, for which the HFA3783 IF QMODEM is recommended. Differential phase shift keying modulation schemes DBPSK and DQPSK, with data scrambling capability, are available along with Complementary Code Keying to provide a variety of data rates. Built-in flexibility allows the HFA3861 to be configured through a general purpose control bus, for a range of applications. Both Receive and Transmit AGC functions with 7-bit AGC control obtain maximum performance in the analog portions of the tra...