HFA3863

Features:

• Complete DSSS Baseband Processor
• RAKE Receiver with Decision Feedback Equalizer
• 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 125ns at 11Mbps,
250ns at 5.5Mbps
• Supports Short Preamble and Antenna Diversity


Application

• Enterprise WLAN Systems
• Systems Targeting IEEE 802.11b Standard
• DSSS PCMCIA or Mini-PCI Wireless Transceiver
• Spread Spectrum WLAN RF Modems
• TDMA or CSMA Packet Protocol Radios
• Part 15 Compliant Radio Links
• Portable PDA/Notebook Computer
• Wireless Digital Audio, Video, Multimedia
• PCN / Wireless PBX / Wireless Local Loop
• Wireless Bridges


Pinout




Specifications

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.0V
Input, Output or I/O Voltage . . . . . . . . . . . GND -0.5V to VCC +0.5V
ESD Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Class 2


Description

The Intersil HFA3863 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.

The HFA3863 has on-board A/D's and D/A 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 HFA3863 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 transceiver. The HFA3863 is housed in a thin plastic quad flat package (TQFP) suitable for PCMCIA board applications. It is pin compatible with the HFA3861B.