intersil ISL3787 DATA SHEET
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ISL3787
Data Sheet July 2003
1.2GHz IF Converter w/AGC and
Synthesizer
The ISL3787 is a highly integrated,
UHF2, Half Duplex IF Converter, PLL
Synthesizer and VCO IC device. It is
part of the Intersil PRISM® V, 5GHz radio chipset.
The ISL3787directly interfaces with the ISL3877 Wireless
LAN Integrated Media Access Controller with Baseband
Processor. Adding Intersil’s ISL3687 5GHz RF/IF Converter
with Integrated Synthesizer allows operation with a single
SAW filter for both Transmit and Receive IF to Baseband
functions. The addition of a power amplifier completes a
Wireless LAN radio application for the 802.11a 5GHz
standard.
The ISL3787 combines all the necessary IF to Baseband
functions into a QFN Plastic Package suitable for miniPCI
and PCMCIA applications.
Ordering Information
PART
NUMBER
ISL3787IR -40 to 85 56 Lead QFN L56.8 X 8
ISL3787IR-TK -40 to 85 Tape and Reel
TEMP. RANGE
O
(
C) PACKAGE PKG. DWG. #
FN8003.1
Features
• Frequency of Operation, RXin/TXout. . . .300 to 1200MHz
• Frequency of Operation, TXin/RXout. . . . . . .10 to 30MHz
• Receive Voltage Gain . . . . . . . . . . . . . . . . . . . . . . . .78dB
• Wide Dynamic AGC Control. . . . . . . . . . . . . . . . . . . .76dB
• Transmit Power Control Range . . . . . . . . . . . . . . . . .40dB
• Integrated Antialiasing and Preshaping Filters
• Integrates a VCO and a Synthesizer PLL
• Low Supply Operation . . . . . . . . . . . . . . . . . . . . . 2.7-3.3V
Applications
• High Data Rate Wireless LAN IEEE 802.11a Systems
• 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
ISL3787
TOP VIEW
Simplified Block Diagram
ISL3787
PLL
SYNTH
LO_VCC
OSC+
OSCLE_IF
DATA
SYN_VDD
GND
CLK
GND
SYN_VDD
GND
VDD
CP_D0+
CP_D0-
OSC_VT-
OSC_VT+
LO_VCC
BYP_CAP2
BYP_CAP1
VCC
GND
VCC
GND
IF-
14131211109876543
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29 30 32 33 34 35 36 37 38 39 40 41 4231
LD
REF_IN-
REF_IN+
AGT_T
AGCREAD1
AGCREAD2
AGCREAD0
VCC
TX_BB_IN-
TX_BB_IN+
IF+
VCC
GND
RX_BB_OUT+
AGCWRITE1
TX_AGC_CTRL
21
56
55
54
53
52
51
50
49
48
47
46
45
44
43
GND
RX_BB_OUT-
VCC
GND
PE1
PE2
GND
VCC
AGCWRITE2
GND
VCC
VCC
GND
AGC_CTRL+
AGC_CTRLREF_OUT
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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