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ADG901 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer ADG901
Beschreibung Wideband 40 dB Isolation at 1 GHz CMOS 1.65V to 2.75V SPST Switches
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 12 Seiten
ADG901 Datasheet, Funktion
Wideband, 40 dB Isolation at 1 GHz, CMOSwww.DataSheet4U.com
1.65 V to 2.75 V, SPST Switches
ADG901/ADG902
FEATURES
Wideband Switch: –3 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 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
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. 40 dB Off Isolation @ 1 GHz
2. 0.8 dB Insertion Loss @ 1 GHz
3. Tiny 8-Lead MSOP/LFCSP Packages
0
TA = 25؇C
–10
–20
–30
–40
–50
–60 VDD = 2.5 V
–70
–80
–90
–100
10k
100k
VDD = 1.8 V
1M
10M
100M
FREQUENCY (Hz)
1G
Figure 1. Off Isolation vs. Frequency
10G
REV. A
–0.4
–0.6
–0.8
–1.0
–1.2
–1.4
–1.6
–1.8
–2.0
–2.2
–2.4
–2.6
–2.8
VDD = 2.5V
TA = 25؇C
–3.0
10k
100k
1M
10M
100M
FREQUENCY (Hz)
1G
Figure 2. Insertion Loss vs. Frequency
10G
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 © 2004 Analog Devices, Inc. All rights reserved.






ADG901 Datasheet, Funktion
ADG901/ADG902
40
35
30
25
20
15
10
5 VDD = 2.5V
TA = 25؇C
0
250 350 450 550 650 750 850
FREQUENCY (MHz)
TPC 10. IP3 vs. Frequency
20
18
16
14
12
10
8
6
4
2
VDD = 2.5V
TA = 25؇C
0
0 250 500 750 1000 1250 1500
FREQUENCY (MHz)
TPC 11. P–1dB vs. Frequency
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