Low Voltage, 400 MHz, Quad 2:1

Mux with 3 ns Switching Time

ADG774A

Rev. B

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other

rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.

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

Tel: 781.329.4700

www.analog.com

Fax: 781.461.3113

©2006 Analog Devices, Inc. All rights reserved.

FEATURES

Bandwidth: >400 MHz

Low insertion loss and on resistance: 2.2 Ω typical

On resistance flatness: 0.3 Ω typical

Single 3 V/5 V supply operation

Very low distortion: <0.3%

Low quiescent supply current: 1 nA typical

Fast switching times

TTL-/CMOS-compatible

Pb-free packages

16-lead QSSOP

16-lead 3 mm × 3 mm body LFCSP

FUNCTIONAL BLOCK DIAGRAM

1 OF 2

DECODER

ADG774A

EN

IN

S1A

S1B

S2A

S2B

S3A

S3B

S4A

S4B

D1

D2

D3

D4

Figure 1.

GENERAL DESCRIPTION

The ADG774A is a monolithic CMOS device comprising four

2:1 multiplexer/demultiplexers with high impedance outputs.

The CMOS process provides low power dissipation yet offers

high switching speed and low on resistance. The on resistance

variation is typically less than 0.5 Ω over the input signal range.

The bandwidth of the ADG774A is typically 400 MHz and this,

coupled with low distortion (typically 0.3%), makes the part

suitable for switching of high speed data signals.

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

range ensuring excellent linearity and low distortion. CMOS

construction ensures ultralow power dissipation.

The ADG774A 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 (see Table 5).

These switches conduct equally well in both directions when

on. In the off condition, signal levels up to the supplies are

blocked. The ADG774A switches exhibit break-before-make

switching action.

PRODUCT HIGHLIGHTS

1.

Wide bandwidth data rates of >400 MHz.

2.

Ultralow power dissipation.

3.

Low leakage over temperature.

4.

Break-before-make switching prevents channel shorting

when the switches are configured as a multiplexer.

5.

Crosstalk is typically −70 dB @ 10 MHz.

6.

Off isolation is typically −65 dB @ 10 MHz.

7.

Available in compact 3 mm × 3 mm LFCSP.