ADG441 Analog Devices Data Sheet

LC2MOS Quad SPST Switches

ADG441/ADG442/ADG444

FUNCTIONAL BLOCK DIAGRAM

FEATURES

44 V supply maximum ratings

IN1 IN1

VSS to VDD analog signal range

D1 D1 Low on resistance (<70 Ω) S2 S2

IN2 IN2

Low ∆RON (9 Ω max)

ADG441 D2 D2

Low RON match (3 Ω max) ADG442

ADG444

Low power dissipation IN3 IN3

Fast switching times D3 D3 S4 S4

t ON < 110 ns

IN4 IN4

t OFF < 60 ns D4 D4 Low leakage currents (3 n A max) SWITCHES SHOWN FOR A LOGIC 1 INPUT Low charge injection (6 p C max)

Figure 1.

Break-before-make switching action Latch-up proof A grade differ in that the ADG444 requires a 5 V logic power supply Plug-in upgrade for DG201A/ADG201A, DG202A/ADG202A, that is applied to the VL pin. The ADG441 and ADG442 do not DG211/ADG211A have a VL pin, the logic power supply is generated internally by Plug-in replacement for DG441/DG442/DG444 an on-chip voltage generator.

Each switch conducts equally well in both directions when ON

APPLICATIONS

and has an input signal range that extends to the power

Audio and video switching

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

Automatic test equipment

www.BDTIC.c are blocked. All switches exhibit break-before-make switching m/ADI

Precision data acquisition

action for use in multiplexer applications. Inherent in the

Battery-powered systems

design is the low charge injection for minimum transients when

Sample-and-hold systems

switching the digital inputs.

Communication systems

PRODUCT HIGHLIGHTS

GENERAL DESCRIPTION

1. Extended signal range. The ADG441A/ADG442A/

The ADG441, ADG442, and ADG444 are monolithic CMOS

ADG444A are fabricated on an enhanced LC2MOS, trench-

devices that comprise of four independently selectable switches.

isolated process, giving an increased signal range that

They are designed on an enhanced LC2MOS process that

extends to the supply rails.

provides low power dissipation yet gives high switching speed

2. Low power dissipation.

and low on resistance.

3. Low RON.

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

4. Trench isolation guards against latch-up for A grade parts. A 3-

range, which ensures good linearity and low distortion when

dielectric trench separates the P and N channel transistors

switching audio signals. High switching speed also makes the

thereby preventing latch-up even under severe overvoltage

parts suitable for video signal switching. CMOS construction

conditions.

ensures ultralow power dissipation, making the parts ideally suited for portable and battery-powered instruments. The 5. Break-before-make switching. This prevents channel ADG441, ADG442, and ADG444 contain four independent shorting when the switches are configured as a multiplexer. SPST switches. Each switch of the ADG441 and ADG444 turns

6. Single-supply operation. For applications where the analog

on when a logic low is applied to the appropriate control input.

signal is unipolar, the ADG441/ADG442/ADG444 can be

The ADG442 switches are turned on with logic high on the

operated from a single-rail power supply. The parts are fully

appropriate control input. The ADG441 and ADG444 switches

specified with a single 12 V power supply.

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.

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