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ADG901BRM Arkusz danych(PDF) 1 Page - Analog Devices

Numer części ADG901BRM
Szczegółowy opis  Wideband, 40 dB Isolation at 1 GHz, CMOS 1.65 V to 2.75 V, SPST Switches
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ADG901BRM Arkusz danych(HTML) 1 Page - Analog Devices

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Wideband, 40 dB Isolation at 1 GHz, CMOS
1.65 V to 2.75 V, SPST Switches
ADG901/ADG902
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
© 2005 Analog Devices, Inc. All rights reserved.
FEATURES
Wideband switch: −3 dB @ 4.5 GHz
ADG901—absorptive switch
ADG902—reflective switch
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 μA)
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 list
FUNCTIONAL BLOCK DIAGRAM
ADG901
RF2
RF1
CTRL
50
Ω
50
Ω
ADG902
RF2
RF1
CTRL
Figure 1.
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 Ω 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
applications 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
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
10k
100k
100M
1M
10M
1G
10G
FREQUENCY (Hz)
VDD = 2.5V
VDD = 1.8V
TA = 25°C
Figure 2. Off Isolation vs. Frequency
–3.0
–2.8
–2.2
–1.6
–1.2
–3.0
–2.6
–2.4
–2.0
–1.8
–1.4
–1.0
–0.8
10k
100k
100M
1M
10M
1G
10G
FREQUENCY (Hz)
–0.6
–0.4
VDD = 2.5V
TA = 25°C
Figure 3. Insertion Loss vs. Frequency


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