1
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..
Pinout
ISL3687 (QFN)
TOP VIEW
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
Simplified Block Diagram
Ordering Information
PART
NUMBER
TEMP. RANGE
(
O
C)
PACKAGE
PKG. DWG. #
ISL3687IR
-40 to 85
48-Lead QFN
L48.7 X 7
ISL3687IR-TK
-40 to 85
Tape and Reel
SYN_V
DD
TX_VCC
TX_G
ND
TX_VCC
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
25 26 27 28 29 30 31 32 33 34 35 36
12 11 10 9
8
7
6
5
4
3
2
1
TX_O
UT+
TX_O
UT-
LN
A_
VCC
LN
A_
G
N
D
LN
A_
G
N
D
LN
A_
I
N
LN
A_
G
N
D
LN
A_
G
N
D
VT_RET
VTUNE
VC
O
_
V
C
C
VC
O_
G
N
D
BYP
_
CAP1
BYP
_
CAP2
BUFF_G
N
D
BUFF_VCC
MI
X_VCC
IF
_I
N_OUT
-
IF
_I
N_O
U
T
+
LE_
R
F
LNA_GND
LNA_GND
LNA_VCC
LNA_GND
AGC_WRITE
MIX_GND
MIX_GND
PE1
GND
PE2
GND
LD
REF_IN
CP_VDD
CP_D0
CP_RET
CP_GND
PRE_GND
PRE_VCC
CLK
DATA
BIAS_GND
BIAS_VCC
SYN_GND
PLL
SYNTH
ISL3687
FN8002.1
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.
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.
ISL3687
Data Sheet
July 2003
PDF 
ZIP