HFA3860

Features:

• Complete DSSS Baseband Processor
• Processing Gain . . . . . . . . . . . . . . . . . . . . . . . . . . 10.4dB
• Programmable Data Rate. . . . . . . . 1, 2, 5.5, and 11 Mbps
• Ultra Small Package . . . . . . . . . . . . . . . . . . . . 7 x 7 x 1mm
• Single Supply Operation (44MHz Max) . . . . . 2.7V to 3.6V
• Modulation Methods . . . . . . .DBPSK, DQPSK, 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)
• Similar Pinout to HFA3824


Application

• Systems Targeting IEEE 802.11 WLAN Standard
• Point-to-Point Links
• DSSS PCMCIA Wireless Transceiver
• Spread Spectrum WLAN RF Modems
• TDMA Packet Protocol Radios
• Part 15 Compliant Radio Links
• Portable Bar Code Scanners/POS Terminal
• Portable PDA/Notebook Computer
• Wireless Digital Audio
• Wireless Digital Video
• PCN/Wireless PBX


Pinout




Specifications

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7.0V
Input, Output or I/O Voltage . . . . . . . . . . . .GND -0.5V to V_CC +0.5V
ESD Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Class 2


Description

The Intersil HFA3860 Direct Sequence (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 for applications requiring 11 Mbps performance.

The HFA3860 has on-board A/Ds for analog I and Q inputs, for which the HFA3726 IF QMODEM is recommended. Differential phase shift keying modulation schemes DBPSK and DQPSK, with data scrambling capability are available, along with M-Ary Bi-Orthogonal Keying to provide a variety of data rates. Built-in flexibility allows the HFA3860 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 network throughput. The HFA3860 is housed in a thin plastic quad flat package (TQFP) suitable for PCMCIA board applications.