ALD4201/ALD4202M

GENERAL DESCRIPTION

The ALD4201/ALD4202M are quad SPST CMOS analog switches speci-

fically developed for 3 to 12 volt applications where low charge injection

and low leakage currents are important analog switch operating

characteristics. The main features are precision matching, charge

compensation circuitry, fast switching, low on-resistance and micropower

consumption. The ALD4201 operates in break-before-make switching

whereas the ALD4202M operates in make-before-break switching.

The ALD4201/ALD4202M 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

general purpose switching applications for micropower battery operated

systems.

APPLICATIONS INFORMATION

The ALD4201/ALD4202M are designed to operate with standard single or

dual power supplies of +3V to 10V or

±1.5V to ±5V. Functionality extends

down to +2V or

±1V power supply, making it suitable for lithium battery or

rechargeable battery operated systems where power efficiency and

performance are important design parameters. These switches feature

nA quiescent current and interface directly to CMOS logic levels from

microprocessor or logic interface circuits. Built- in level shifters at the input

stage provide for dual supply analog signal switching. On the board level,

low charge injection and fast operation can be obtained 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 ALD4201/4202M are manufactured with Advanced Linear Devices'

enhanced ACMOS silicon gate CMOS process, and are also part of the

linear elements in Advanced Linear Devices' "Function-Specific" ASIC.

CMOS LOW VOLTAGE, LOW CHARGE INJECTION QUAD SPST ANALOG SWITCHES

FEATURES

• 3V, 5V & 10V supply operation

•

±1.5V, ±2.5V & ±5V supply operation

• 0.1

µW power dissipation

• 1pC charge injection

• Rail-to-rail signal range

• Low on-resistance

• pA leakage current

• 4201 break-before-make switching

• 4202M make-before-break switching

• Built-in dual supply level translator

BENEFITS

• Fast effective signal throughput

• Low switching transients

• Low signal loss

• Essentially no DC power consumption

• Full analog signal range over power

supply rail

• Flexible power supply range for battery

operated systems

APPLICATIONS

• Low level signal conditioning circuits

• Portable battery operated instruments

• Computer peripherals

• PCMCIA

• Fast sample and hold

• Analog signal multiplexer

• Programmable gain amplifiers

• Switched capacitor circuits

• Micropower based systems

• Video/audio switches

• Feedback control systems

PIN CONFIGURATION / BLOCK DIAGRAM

* Contact factory for industrial temperature range.

Operating Temperature Range

-55

°C to +125°C0°C to +70°C0°C to +70°C

16-Pin

16-Pin

16-Pin

CERDIP

Plastic Dip

SOIC

Package

Package

Package

ALD4201 DC

ALD4201 PC

ALD4201 SC

ALD4202M DC

ALD4202M PC

ALD4202M SC

ORDERING INFORMATION

DC, PC, SC PACKAGE

1

14

2

3

13

12

11

10

9

4

5

6

7

8

15

16

V-

GND

V+

NC

Input Logic

Switch State

ALD4201

ALD4202M

0

On

Off

1

Off

On

LOGIC TABLE

© 2005.1 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, California 94089 -1706 Tel: (408) 747-1155 Fax: (408) 747-1286 http://www.aldinc.com