intersil ISL3687 DATA SHEET
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ISL3687
Data Sheet July 2003
5GHz RF/IF Converter with Integrated
Synthesizer
The ISL3687 is a highly integrated,
SiGe, Half Duplex RF/IF Converter
with integrated PLL Synthesizer and
VCO IC device. It is part of the Intersil PRISM® V,
5GHz radio chipset.
The ISL3687 directly interfaces with Intersil’s ISL3787
1.2GHz IF Converter with AGC and Synthesizer to allow
operation with a single SAW filter for both Transmit and
Receive functions. The addition of the Intersil’s ISL3877
Wireless LAN Media Access Controller and Baseband
Processor completes a Wireless LAN radio application for
the 802.11a 5GHz standard.
The ISL3687 combines all the necessary RF front end
functions into a QFN Package suitable for miniPCI and
PCMCIA applications..
Ordering Information
PART
NUMBER
ISL3687IR -40 to 85 48-Lead QFN L48.7 X 7
ISL3687IR-TK -40 to 85 Tape and Reel
TEMP. RANGE
O
(
C) PACKAGE PKG. DWG. #
FN8002.1
Features
• RF Input Range . . . . . . . . . . . . . . . . . . . .5.15 to 5.35GHz
• IF Output . . . . . . . . . . . . . . . . . . . . . . . . . .750 to 870MHz
• Receive Cascaded Noise Figure . . . . . . . . . . . . . . . 5.4dB
• Selectable LNA Gain Step . . . . . . . . . . . . . . . . . . . . .22dB
• Transmit Power . . . . . . . . . . . . . . . . . . . . . . . . . . . .0 dBm
• Integrates a VCO and a Synthesizer PLL
• Internally Matched
• Integrated Image and SSB TX filters
• Multiplexed Port for Single IF Filter application
• Low Supply Operation . . . . . . . . . . . . . . . . . . . . . 2.7-3.3V
Applications
• High Data Rate Wireless LAN Systems Targeting the
IEEE 802.11a Standard
• PCI, miniPCI and PCMCIA Wireless LAN Adapters
• Spread Spectrum WLAN RF Modems
• TDMA or CSMA Packet Protocol Radios
• PCN/ Wireless PBX/Wireless Local Loop
Pinout
SYN_GND
REF_IN
CP_VDD
CP_D0
CP_RET
CP_GND
PRE_GND
PRE_VCC
CLK
DATA
BIAS_GND
BIAS_VCC
ISL3687 (QFN)
TOP VIEW
SYN_VDD
TX_VCC
TX_GND
TX_VCC
TX_OUT+
TX_OUT-
LNA_VCC
LNA_GND
BUFF_VCC
BUFF_GND
LNA_GND
MIX_VCC
12 11 10 9 8 7 6 5 4 3 2 1
13
14
15
16
17
18
19
20
21
22
23
24
25 26 27 28 29 30 31 32 33 34 35 36
VTUNE
VT_RET
VCO_VCC
VCO_GND
BYP_CAP1
BYP_CAP2
Simplified Block Diagram
LNA_IN
LNA_GND
LNA_GND
LNA_GND
48
LNA_GND
47
LNA_VCC
46
LNA_GND
45
AGC_WRITE
44
MIX_GND
43
MIX_GND
42
PE1
41
GND
40
PE2
39
GND
38
LD
37
LE_RF
IF_IN_OUT-
IF_IN_OUT+
PLL
SYNTH
ISL3687
1
Copyright © Intersil Americas Inc. 2003. All Rights Reserved. All other trademarks mentioned are the property of their respective owners.
PRISM® is a registered trademark of Intersil Americas Inc. PRISM and design is a trademark of Intersil Americas Inc.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
| Intersil (and design) is a registered trademark of Intersil Americas Inc.
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