HFA3860B Datasheet, PDF (1/40 Pages) Intersil Corporation – Direct Sequence Spread Spectrum Baseband Processor

Data Sheet
HFA3860B
July 1999 File Number 4594.1
Direct Sequence Spread Spectrum
Baseband Processor
™ The Harris HFA3860B 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 HFA3860B has on-board A/Ds 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 data scrambling capability, are available
along with Complementary Code Keying and M-Ary
Bi-Orthogonal Keying to provide a variety of data rates. Built-
in flexibility allows the HFA3860B 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 HFA3860B is housed in a thin plastic quad
flat package (TQFP) suitable for PCMCIA board applications.
Ordering Information
PART NO.
HFA3860BIV
HFA3860BIV96
TEMP.
RANGE (^oC)
-40 to 85
-40 to 85
PKG. TYPE
48 Ld TQFP
Tape and Reel
PKG. NO.
Q48.7x7
Pinout
HFA3860B (TQFP)
TEST_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
1213
14
15
16
17
18
19
20
21
22
23
25
24
RXCLK
RXD
MD_RDY
RX_PE
CCA
GND
MCLK
V_DD
RESET
ANTSEL
ANTSEL
SD
Features
• Complete DSSS Baseband Processor
• Processing Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . ≥10dB
• Programmable Data Rate. . . . . . . 1, 2, 5.5, and 11MBPS
• Ultra Small Package . . . . . . . . . . . . . . . . . . . 7 x 7 x 1mm
• Single Supply Operation (44MHz Max) . . . . 2.7V to 3.6V
• Modulation Methods . . DBPSK, DQPSK, CCK, 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)
• Backwards Compatible with HFA3824A, HFA3860A
• Supports Dual Antenna Diversity
Applications
• Enterprise WLAN Systems
• Systems Targeting IEEE 802.11 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
Simplified Block Diagram
I_IN
3-BIT
A/D
DEMOD.
Q_IN
RSSI
I_OUT
3-BIT
A/D
6-BIT
A/D
CCA
PRO-
CESSOR
INTER-
FACE
CTRL
Q_OUT
MOD.
4-1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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