GENERAL DESCRIPTION

The ALD4211/ALD4212/ALD4213 are quad SPST CMOS analog

switches specifically designed for low voltage, high speed applications

where 0.2pC charge injection, 200pf sampling capacitor, and picoamp

leakage current are important analog switch operating characteristics.

These analog switches feature fast switching, low on-resistance and

micropower consumption.

TheALD4211/4212/4213 are designed for precision applications such as

charge amplifiers, sample and hold amplifiers, data converter switches,

and programmable gain amplifiers. These switches are also excellent for

low voltage micropower general purpose switching applications.

APPLICATIONS INFORMATION

The ALD4211/4212/4213 operate with a standard single power supply

from +3V to +12Volts. Functionality extends down to a +2 volt power

supply making it suitable for lithium battery or rechargeable battery

operated systems where power, efficiency, and performance are

important design considerations.

Break-before-make switching is

guaranteed with single supply operation. The ALD4211/4212/4213

may also be used with dual power supplies from

±1.5 to ±6 volts.

With special charge balancing and charge cancellation circuitry on

chip the ALD4211/ALD4212/ALD4213 were developed for ultra low

charge injection applications. Using a 200pF sampling capacitor, very

fast precise signal

acquisition may be achieved.

With ultra low

quiescent current, these switches interface directly to CMOS logic

levels from microprocessor or logic circuits. On the board level, low

charge injection and fast operation may be achieved by using short

leads, minimizing input and output capacitances, and by adequate

bypass capacitors placed on the board at the supply nodes. For more

information, see Application Note AN4200.

The ALD4211/ALD4212/ALD4213 are manufactured with Advanced Linear

Devices enhanced ACMOS silicon gate CMOS process.

They are

designed also as linear cell elements in Advanced Linear Devices’

“Function-Specific” ASIC.

CMOS LOW VOLTAGE HIGH SPEED QUAD PRECISION ANALOG SWITCHES

ALD4211/ALD4212

ALD4213

FEATURES

• 3V, 5V and

±5V supply operation

• 0.2pC charge injection

• 200pF sampling capacitor

• pA leakage current

• 0.1

µW power dissipation

• High precision

• Rail to rail signal range

• Low On-resistance

• Break-before-make switching

BENEFITS

• Five times faster signal capture

• Low switching transients

• Low signal loss

• Essentially no DC power consumption

• Full analog signal range from rail to rail

• Flexible power supply range for battery

operated systems

APPLICATIONS

• Fast sample and hold

• Computer peripherals

• PCMCIA

• Low level signal conditioning circuits

• Portable battery operated systems

• Analog signal multiplexer

• Programmable gain amplifiers

• Switched capacitor circuits

• Micropower based systems

• Video/audio switches

• Feedback control systems

Operating Temperature Range

-55

°C to +125°C

-40

°C to +85°C

-40

°C to +85°C

16-Pin

16-Pin

16-Pin

CERDIP

Plastic Dip

SOIC

Package

Package

Package

ALD4211 DC

ALD4211 PC

ALD4211 SC

ALD4212 DC

ALD4212 PC

ALD4212 SC

ALD4213 DC

ALD4213 PC

ALD4213 SC

ORDERING INFORMATION

* Contact factory for industrial temperature range.

LOGIC TABLE

Input Logic

Switch State

ALD4211 ALD4212

ALD4213

0

On

Off

Off

On

1

Off

On

On

Off

Switch 1 / Switch 4

Switch 2 / Switch 3

PIN CONFIGURATION/ BLOCK DIAGRAM

DC, PC, SC PACKAGE

1

14

2

3

13

12

11

10

9

4

5

6

7

8

15

16

V-

GND

V+

NC

© 1998 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, California 94089 -1706 Tel: (408) 747-1155 Fax: (408) 747-1286 http://www.aldinc.com