ADG725/ADG731

=

REV. PrD May 2002

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

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

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

Analog Devices, Inc., 2002

16-/32- Channel, Serially Controlled 4

Ω

Ω

Ω

Ω

Ω

1.8 V to 5.5 V, ±2.5 V, Analog Multiplexers

Preliminary Technical Data

PRELIMINARY TECHNICAL DATA

FEATURES

3-Wire SPI Serial Interface

1.8 V to 5.5 V Single Supply

±2.5 V Dual Supply Operation

4

Ω

Ω

Ω

Ω

Ω On Resistance

0.5

Ω

Ω

Ω

Ω

Ω On Resistance Flatness

7mm x 7mm 48 lead Chip Scale Package (CSP)

or 48 lead TQFP package.

Rail to Rail Operation

Power On Reset

Fast Switching Times

Single 32 to 1 Channel Multiplexer

Dual/Differential 16 to 1 Channel Multiplexer

TTL/CMOS Compatible Inputs

For Functionally Equivalent devices with Parallel Interface

See ADG726/ADG732

APPLICATIONS

Optical Applications

Data Acquisition Systems

Communication Systems

Relay replacement

Audio and Video Switching

Battery Powered Systems

Medical Instrumentation

Automatic Test Equipment

GENERAL DESCRIPTION

The ADG725/ADG731 are monolithic CMOS 32

channel/dual 16 channel analog multiplexers with a

serially controlled 3-wire interface. The ADG732 switches

one of thirty-two inputs (S1-S32) to a common output, D.

The ADG725 can be configured as a dual mux switching

one of sixteen inputs to one output or a differential mux

switching one of sixteen inputs to a differential output.

These mulitplexers utilize a 3-wire serial interface that is

compatible with SPI

some DSP interface standards. On power-up, the internal

shift register contains all zeros and all switch are in the

OFF state.

These multiplexers are designed on an enhanced submi-

cron process that provides low power dissipation yet gives

high switching speed, very low on resistance and leakage

currents. They operate from single supply of 1.8V to 5.5V

and ±2.5 V dual supply, making them ideally suited to a

variety of applications. On resistance is in the region of a

few Ohms and is closely matched between switches and

very flat over the full signal range. These parts can operate

equally well as either Multiplexers or De-Multiplexers

PRODUCT HIGHLIGHTS

1.

3-Wire Serial Interface.

2.

+1.8 V to +5.5 V Single or ±2.5 V Dual Supply

operation. These parts are specified and guaranteed

with +5 V ±10%, +3 V ±10% single supply and

±2.5 V ±10% dual supply rails.

3.

On Resistance of 4

Ω.

4.

Guaranteed Break-Before-Make Switching Action.

5.

7mm x 7mm 48 lead Chip Scale Package (CSP)

or 48 lead TQFP package.

FUNCTIONAL BLOCK DIAGRAMS

S1

S32

SCLK DIN SYNC

D

ADG731

INPUT SHIFT

REGISTER

S1A

DA

S16A

S1B

S16B

DB

ADG725

INPUT SHIFT

REGISTER

SCLK DIN SYNC

and have an input signal range which extends to the sup-

plies. In the OFF condition, signal levels up to the

supplies are blocked. All channels exhibit break before

make switching action preventing momentary shorting

when switching channels.

They are available in either 48 lead CSP or TQFP

package.