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HFA3824A Datasheet

Part NameDescriptionManufacturer
HFA3824A Direct Sequence Spread Spectrum Baseband Processor Intersil
Intersil Intersil
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The Intersil HFA3824A 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.
The HFA3824A has on-board ADC’s 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 optional data scrambling capability, are combined with a programmable PN sequence of up to 16 bits. Built-in flexibility allows the HFA3824A to be configured through a general purpose control bus, for a wide range of applications. A Receive Signal Strength Indicator (RSSI) monitoring function with on-board 6-bit 2 MSPS ADC provides Clear Channel Assessment (CCA) to avoid data collisions and optimize network throughput. The HFA3824A is housed in a thin plastic quad flat package (TQFP) suitable for PCMCIA board applications.

Features
• Complete DSSS Baseband Processor
• High Data Rate. . . . . . . . . . . . . . . . . . . . . . .up to 4 MBPS
• Processing Gain . . . . . . . . . . . . . . . . . . . . . . . . up to 12dB
• Programmable PN Code . . . . . . . . . . . . . . . .up to 16 Bits
• Ultra Small Package . . . . . . . . . . . . . . . . . . . . 7 x 7 x 1mm
• Single Supply Operation (44MHz Max) . . . . . 2.7V to 5.5V
• Modulation Method. . . . . . . . . . . . . . . .DBPSK or DQPSK
• Supports Full or Half Duplex Operations
• On-Chip A/D Converters for I/Q Data (3-Bit, 44 MSPS) and RSSI (6-Bit, 2 MSPS)
• Backward Compatible with HSP3824
• Programmable Rotation I, Q Sense

Applications
• Systems Targeting IEEE802.11 Standard
• 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

 

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