HFA3860A Datasheet, PDF (1/39 Pages) Intersil Corporation – Direct Sequence Spread Spectrum Baseband

Data Sheet
HFA3860A
November 1998 File Number 4488.2
Direct Sequence Spread Spectrum
Baseband
™ The Intersil HFA3860A 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 HFA3860A 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 M-Ary Bi-Orthogonal Keying to provide a variety
of data rates. Built-in flexibility allows the HFA3860A 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 HFA3860A is housed
in a thin plastic quad flat package (TQFP) suitable for
PCMCIA board applications.
Ordering Information
PART NO.
TEMP.
RANGE (^oC)
PKG. TYPE PKG. NO.
HFA3860AIV
-40 to 85 48 Ld TQFP Q48.7x7
HFA3860AIV96
-40 to 85 Tape and Reel
Pinout
HFA3860A (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 . . . . . . . . . . . . . . . . . . . . . . . . . . ≥10.4dB
• 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, and MBOK
• Supports Full or Half Duplex Operations
• On-Chip A/D Converters for I/Q Data (3-Bit, 22MSPS) and
RSSI (6-Bit)
• Backwards Compatible with HFA3860
• Supports Antenna Diversity
Applications
• Enterprise WLAN Systems
• Systems Targeting Ethernet Data Rates
• 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
I_IN
Q_IN
RSSI
I_OUT
SIMPLIFIED BLOCK DIAGRAM
3-BIT
A/D
DEMOD.
3-BIT
A/D
6-BIT
A/D
CCA
PRO-
CESSOR
INTER-
FACE
CTRL
Q_OUT
MOD.
2-131
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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