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Analog Devices Semiconductor Electronic Components Datasheet

ADG904 Datasheet

Wideband 37 dB Isolation at 1 GHz CMOS 1.65V to 2.75V 4:1 Mux/SP4T

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Wideband, 37 dB Isolation at 1 GHz,
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CMOS 1.65 V to 2.75 V, 4:1 Mux/SP4T
ADG904/ADG904-R
FEATURES
Wideband switch: –3 dB @ 2.5 GHz
ADG904: Absorptive 4:1 Mux/SP4T
ADG904-R: Reflective 4:1 Mux/SP4T
High off isolation (37 dB @ 1 GHz)
Low insertion loss (1.1 dB dc to 1 GHz)
Single 1.65 V to 2.75 V power supply
CMOS/LVTTL contol logic
20-lead TSSOP
Low power consumption (1 µA max)
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
GENERAL DESCRIPTION
The ADG904/ADG904-R are wideband analog 4:1multiplexers
that use a CMOS process to provide high isolation and low
insertion loss to 1 GHz. The ADG904 is an absorptive/matched
mux with 50 Ω terminated shunt legs; the ADG904-R is a
reflective mux. These devices are designed such that the isola-
tion is high over the dc to 1 GHz frequency range.
The ADG904/ADG904-R switches 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.
–10
VDD = 2.5V
–20
–30
–40
–50
S21
–60
–70 S12
–80
10k
100k
1M 10M 100M
FREQUENCY (Hz)
1G
10G
Figure 3. Off Isolation vs. Frequency
Rev. 0
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.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
ADG904
RF1
FUNCTIONAL BLOCK DIAGRAMS
ADG904-R
RF1
50
RF2 RF2
50RFC
RFC
RF3 RF3
50
RF4 RF4
50
1 OF 4 DECODER
A0 A1 EN
1 OF 4 DECODER
A0 A1 EN
Figure 1
Figure 2
The parts have on-board CMOS control logic, thus eliminating
the need for external control circuitry. The control inputs are
both CMOS and LVTTL compatible. The ADG904/ADG904-R’s
low power consumption makes them ideally suited for wireless
applications and general-purpose high frequency switching.
PRODUCT HIGHLIGHTS
1. –37 dB off isolation @ 1 GHz
2. 1.1 dB insertion loss @ 1 GHz
3. 20-lead TSSOP packages
–0.3
–0.4
–0.5
–0.6
–0.7
–0.8
–0.9
–1.0
–1.1
–1.2
–1.3
–1.4
–1.5
–1.6
–1.7
–1.8
–1.9
–2.0
–2.1
–2.2
–2.3
–2.4
–2.5
–2.6
–2.7
–2.8 VDD = 2.5V
–2.9
–3.0
TA = 25°C
10k 100k
1M 10M 100M
FREQUENCY (Hz)
1G
Figure 4. Insertion Loss vs. Frequency
10G
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.


Analog Devices Semiconductor Electronic Components Datasheet

ADG904 Datasheet

Wideband 37 dB Isolation at 1 GHz CMOS 1.65V to 2.75V 4:1 Mux/SP4T

No Preview Available !

ADG904/ADG904-R
TABLE OF CONTENTS
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 4
Pin Configuration and Function Descriptions............................. 5
Terminology ...................................................................................... 6
Typical Performance Characteristics ............................................. 7
Test Circuits....................................................................................... 9
Applications..................................................................................... 11
REVISION HISTORY
Revision 0: Initial Version
www.DataSheet4U.com
Absorptive vs. Reflective............................................................ 11
Antenna Diversity Switch.......................................................... 11
Filter Selection ............................................................................ 11
Tx/Rx Switching ......................................................................... 11
Evaluation Board ............................................................................ 12
Outline Dimensions ....................................................................... 13
Ordering Guide .......................................................................... 13
Rev. 0 | Page 2 of 16


Part Number ADG904
Description Wideband 37 dB Isolation at 1 GHz CMOS 1.65V to 2.75V 4:1 Mux/SP4T
Maker Analog Devices
Total Page 16 Pages
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