50鈩?/div>
FEATURES
Wideband DC to 2GHz
ADG918/ADG919 Absorptive/Reflective Switches
High Off Isolation (43 dB @ 1 GHz)
Low Insertion Loss (1 dB DC to 900 MHz)
Single 1.65 to 2.75 V power supply
CMOS/LVTTL Control Logic
8 Lead MSOP & Tiny 3 x 3mm CSP Packages
碌
Low Power Consumption (5碌A(chǔ))
APPLICATIONS
Wireless Communications
General Purpose RF switching
Dual Band Applications
Filter Selection
Antenna Switch
Digital Transceiver Front-End Switch
IF Switching
GENERAL DESCRIPTION
ADG919
RF1
RF COMMON
RF2
CONTROL
The ADG918/ADG919 are wideband switches using a
CMOS process to provide high isolation and low insertion
loss to 1GHz. The ADG918 is an absorptive switch
having 50 ohm terminated shunt legs, while the ADG919
is a reflective switch. These devices are designed such that
the isolation is high over the DC to 1GHz 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.
Table 1. Truth Table
Control
0
1
Signal Path
RF2 to RF Common
RF1 to RF Common
Figure 1. Isolation vs Frequency
Figure 2. Loss vs Frequency
REV. PrC Sept 2002
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P Box 9106, Norwood, MA 02062-9106, U.S.A.
.O.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
Analog Devices, Inc., 2002
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