984355975EVALADG904_ADG904_R| Application Note
Evaluation Board for Wideband CMOS 4:1 Mux/SP4T EVAL-ADG904/ADG904-R
FEATURES
Evaluation board for the ADG904/ADG904-R RF through for evaluation board calibration
J12 1 GND VDD J3 H C1 J5 RF1 C2 C3 U1 J7 RF3 RF4 J8 RF2 K1 L EN J1 H K3 L A0 J2 H K2 J6 L A1
INTRODUCTION
This evaluation board document describes the evaluation board for the ADG904/ADG904-R wideband multiplexers. The ADG904/ADG904-R are wideband, analog 4:1 multiplexers, using a CMOS process to provide high isolation and low insertion loss to 1 GHz. The ADG904 is an absorptive/matched mux having 50 terminated shunt legs, whereas the ADG904-R is a reflective mux. These devices are designed such that the isolation is high over the dc to1 GHz frequency range. The ADG904/ADG904-R switch one of four inputs to a common output, RFC, as determined by the 3-bit binary address lines (A0, A1, and EN). A Logic 1 on the EN pin disables the device. The ADG904/ADG904-R have on-board CMOS control logic, thus eliminating the need for external controlling circuitry. The control inputs are CMOS compatible. Complete information and specifications for the ADG904 and ADG904-R are available in the ADG904/ADG904-R data sheet available from Analog Devices, Inc., and should be consulted in conjunction with this evaluation board docume
nt when using the evaluation board.
J4 RFC
EVAL-ADG904-R/ADG904
CAL J9 CAL
J10
06280-001
Figure 1. Evaluation Board (Top View)
POWER SUPPLIES
This evaluation board has one analog power supply input, VDD, and a ground (GND). VDD can equal 1.65 V to 2.75 V. The A0, A1, and EN control inputs are applied by the SMB connectors; or, they can be tied high to VDD or low to GND by using the links (K1 to K3) on the evaluation board. See Table 1 for details. Table 1. Link Operation
A0 (K3) X L L H H A1 (K2) X L H L H EN (K1) H L L L L On Switch None RF1 RF2 RF3 RF4
Rev. 0
Evaluation boards are only intended for device evaluation and not for production purposes. Evaluation boards are supplied "as is" and without warranties of any kind, express, implied, or statutory including, but not limited to, any implied warranty of merchantability or fitness for a particular purpose. No license is granted by implication or otherwise under any patents or other intellectual property by application or use of evaluation boards. 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. Analog Devices reserves the right to change devices or specifications at any time without notice. Trademarks and registered trademarks are the property of their respective owners. Evaluation boards are not authorized to be used in life support devices or systems.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. www.analog.com Tel: 781.329.4700 Fax: 781.461.3113 2007 Analog Devices, Inc. All rights reserved.
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