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ADG901 Datasheet(PDF) 1 Page - Analog Devices |
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ADG901 Datasheet(HTML) 1 Page - Analog Devices |
1 / 16 page 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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