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ADG918BRM-REEL Datasheet(PDF) 1 Page - Analog Devices |
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ADG918BRM-REEL Datasheet(HTML) 1 Page - Analog Devices |
1 / 16 page Wideband 4 GHz, 43 dB Isolation at 1 GHz, CMOS 1.65 V to 2.75 V, 2:1 Mux/SPDT ADG918/ADG919 Rev. C Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother 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 ©2003–2008 Analog Devices, Inc. All rights reserved. FEATURES Wideband switch: −3 dB @ 4 GHz Absorptive/reflective switches High off isolation (43 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 FUNCTIONAL BLOCK DIAGRAMS RF2 RF1 CTRL ADG918 RFC 50Ω 50Ω ADG919 RF2 RF1 CTRL RFC Figure 1. GENERAL DESCRIPTION The ADG918/ADG919 are wideband switches using a CMOS process to provide high isolation and low insertion loss to 1 GHz. The ADG918 is an absorptive (matched) switch having 50 Ω terminated shunt legs, whereas the ADG919 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 and general-purpose high frequency switching applications. PRODUCT HIGHLIGHTS 1. –43 dB off isolation @ 1 GHz. 2. 0.8 dB insertion loss @ 1 GHz. 3. Tiny 8-lead MSOP/LFCSP packages. FREQUENCY (Hz) 10k 100k 1M 10M 100M 1G 10G –100 –90 –70 –60 –50 –40 –30 –80 –20 –10 0 S21 VDD = 2.5V TA = 25°C S12 Figure 2. Off Isolation vs. Frequency FREQUENCY (Hz) 10k 100k 1M 10M 100M 1G 10G –3.2 –2.8 –2.6 –2.4 –2.2 –1.8 –1.6 –1.4 –1.2 –1.0 –2.0 –3.0 –0.8 –0.6 –0.4 VDD = 2.5V TA = 25°C Figure 3. Insertion Loss vs. Frequency |
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