a

ADG774

REV. C

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. 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.

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.

CMOS 3 V/5 V,

Wide Bandwidth Quad 2:1 Mux

FUNCTIONAL BLOCK DIAGRAM

1 OF 2

DECODER

ADG774

EN

IN

S1A

S1B

S2A

S2B

S3A

S3B

S4A

S4B

D1

D2

D3

D4

FEATURES

Low Insertion Loss and On Resistance: 2.2

Typical

On Resistance Flatness 0.5

Typical

Automotive Temperature Range

–40 C to +125 C

–3 dB Bandwidth = 240 MHz

Single 3 V/5 V Supply Operation

Rail-to-Rail Operation

Very Low Distortion: 0.5%

Low Quiescent Supply Current (1 nA Typical)

Fast Switching Times

TTL/CMOS Compatible

APPLICATIONS

USB 1.1 Signal Switching Circuits

Cell Phones

PDAs

Battery-Powered Systems

Communications Systems

Data Acquisition Systems

Token Ring 4 Mbps/16 Mbps

Audio and Video Switching

Relay Replacement

GENERAL DESCRIPTION

The ADG774 is a monolithic CMOS device comprising four

2:1 multiplexer/demultiplexers with high impedance outputs.

The CMOS process provides low power dissipation yet gives

high switching speed and low on resistance. The on resistance

variation is typically less than 0.5

Ω with an input signal ranging

from 0 V to 5 V.

The bandwidth of the ADG774 is greater than 200 MHz; this,

coupled with low distortion (typically 0.5%), makes the part

suitable for switching USB 1.1 data signals and fast Ethernet

signals.

The on resistance profile is very flat over the full analog input

range ensuring excellent linearity and low distortion when

switching audio signals. Fast switching speed, coupled with high

signal bandwidth, also makes the parts suitable for video signal

switching. CMOS construction ensures ultralow power dissipa-

tion, making the parts ideally suited for portable and battery-

powered instruments.

The ADG774 operates from a single 3.3 V/5 V supply and is

TTL logic compatible. The control logic for each switch is shown

in the Truth Table.

These switches conduct equally well in both directions when ON,

and have an input signal range that extends to the supplies. In

the OFF condition, signal levels up to the supplies are blocked.

The ADG774 switches exhibit break-before-make switching

action.

PRODUCT HIGHLIGHTS

1. Wide –3 dB Bandwidth, 240 MHz.

2. Ultralow Power Dissipation.

3. Extended Signal Range.

The ADG774 is fabricated on a CMOS process giving an

increased signal range that fully extends to the supply rails.

4. Low Leakage Over Temperature.

5. Break-Before-Make Switching.

This prevents channel shorting when the switches are config-

ured as a multiplexer.

6. Crosstalk Typically –70 dB @ 30 MHz.

7. Off Isolation Typically –60 dB @ 10 MHz.