adg918 Analog Devices, Inc., adg918 Datasheet

adg918

Manufacturer Part Number

adg918

Description

Wideband, 43db Isolation 1ghz, Cmos 1.65 V To 2.75v, 2 1 Mux/spdt Switches

Manufacturer

Analog Devices, Inc.

Datasheet

1.ADG918.pdf (16 pages)

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Download datasheet (626Kb)

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

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, while 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

Rev. A

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.

–100

–10

–30

–40

–50

–60

–70

–80

–90

10k

= 25°C

= 2.5V

100k

Figure 2. Off Isolation vs. Frequency

FREQUENCY (Hz)

S12

10M

S21

100M

CMOS 1.65 V to 2.75 V, 2:1 Mux/SPDT Switches

10G

Wideband 4 GHz, 43 dB Isolation at 1 GHz,

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. –43 dB Off Isolation @ 1 GHz.

2. 0.8 dB Insertion Loss @ 1 GHz.

3. Tiny 8-Lead MSOP/LFCSP Packages.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.326.8703

–0.4

–0.6

–1.0

–1.2

–1.4

–1.6

–1.8

–2.0

–2.2

–2.4

–2.6

–2.8

–3.0

–3.2

10k

FUNCTIONAL BLOCK DIAGRAMS

= 25°C

= 2.5V

100k

CTRL

Figure 3. Insertion Loss vs. Frequency

RFC

FREQUENCY (Hz)

ADG918

ADG919

Figure 1.

ADG918/ADG919

10M

50Ω

100M

RF1

RF2

RF1

RF2

www.analog.com

10G

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