HFA3860 Datasheet, PDF (1/40 Pages) Intersil Corporation – 11 Mbps Direct Sequence Spread Spectrum Baseband Processor

Data Sheet
HFA3860
July 1998
File Number 4347
11 Mbps Direct Sequence Spread
Spectrum Baseband Processor
™ 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.
Ordering Information
PART NO.
HFA3860IV
HFA3860IV96
TEMP.
RANGE (^oC)
-40 to 85
-40 to 85
PKG. TYPE
48 Ld TQFP
Tape and Reel
PKG. NO.
Q48.7x7
Simplified Block Diagram
I_IN
3-BIT
A/D
Q_IN
3-BIT
A/D
RSSI
6-BIT
A/D
I_OUT
DEMOD.
CCA
PRO-
CESSOR
INTER-
FACE
CTRL
Q_OUT
MOD.
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
Applications
• 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
HFA3860 (TQFP)
EST_CK
TX_PE
TXD
TXCLK
TX_RDY
GND
V_DD
R/W
CS
V_DDA
GND
I_IN
48 47 46 45 44 43 42 41 40 39 38 37
1
36
2
35
3
34
4
33
5
32
6
31
7
30
8
29
9
28
10
27
11
26
12
25
13 14 15 16 17 18 19 20 21 22 23 24
RXCLK
RXD
MD_RD
RX_PE
CCA
GND
MCLK
V_DD
RESET
ANTSE
ANTSE
SD
4-1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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