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ADG901 Datasheet

  • ADG901

  • Wideband, 40 dB Isolation at 1 GHz, CMOS 1.65 V to 2.75 V, S...

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Wideband, 40 dB Isolation at 1 GHz, CMOS
1.65 V to 2.75 V, SPST Switches
ADG901/ADG902
FEATURES
Wideband Switch: 鈥? dB @ 4.5 GHz
Absorptive/Reflective Switches
High Off Isolation (40 dB @ 1 GHz)
Low Insertion Loss (0.8 dB @1 GHz)
Single 1.65 V to 2.75 V Power Supply
CMOS/LVTTL Control Logic
8-Lead MSOP and Tiny 3 mm 3 mm LFCSP Packages
Low Power Consumption (<1 A)
APPLICATIONS
Wireless Communications
General-Purpose RF Switching
Dual-Band Applications
High Speed Filter Selection
Digital Transceiver Front End Switch
IF Switching
Tuner Modules
Antenna Diversity Switching
FUNCTIONAL BLOCK DIAGRAMS
ADG901
RF1
RF2
50
50
CTRL
ADG902
RF1
RF2
CTRL
GENERAL DESCRIPTION
The ADG901/ADG902 are wideband switches that use a
CMOS process to provide high isolation and low insertion loss to
1 GHz. The ADG901 is an absorptive (matched) switch with
50
鈩?/div>
terminated shunt legs, while the ADG902 is a reflective
switch. These devices are designed such that the isolation is
high over the dc to 1 GHz frequency range. They have on-board
CMOS control logic, thus eliminating the need for external
controlling circuitry. The control inputs are both CMOS and
0
鈥?0
T
A
= 25 C
LVTTL compatible. The low power consumption of these
CMOS devices makes them ideally suited to wireless applica-
tions and general-purpose high frequency switching.
PRODUCT HIGHLIGHTS
1. 鈥?0 dB Off Isolation @ 1 GHz
2. 0.8 dB Insertion Loss @ 1 GHz
3. Tiny 8-Lead MSOP/LFCSP Packages
鈥?.4
鈥?.6
鈥?0
INSERTION LOSS (dB)
鈥?.8
鈥?.0
鈥?0
ISOLATION (dB)
鈥?.2
鈥?.4
鈥?.6
鈥?.8
鈥?.0
鈥?.2
鈥?.4
鈥?.6
V
DD
= 2.5V
T
A
= 25 C
100k
1M
10M
100M
FREQUENCY (Hz)
1G
10G
鈥?0
鈥?0
鈥?0
鈥?0
鈥?0
鈥?0
V
DD
= 1.8 V
V
DD
= 2.5 V
鈥?.8
10G
鈥?00
10k
100k
1M
10M
100M
FREQUENCY (Hz)
1G
鈥?.0
10k
Figure 1. Off Isolation vs. Frequency
Figure 2. Insertion Loss vs. Frequency
REV. A
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
漏 2004 Analog Devices, Inc. All rights reserved.

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ADG902

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