US5881

CMOS Multi-Purpose Switch

US5881 CMOS Multi-Purpose Switch

3901005881 Rev 5.0

24/July/01

Page 5

Unique Features

CMOS Hall IC Technology

The chopper stabilized amplifier uses switched ca-

pacitor techniques to eliminate the amplifier offset

voltage, which, in bipolar devices, is a major source

of temperature sensitive drift. CMOS makes this ad-

vanced technique possible.

The CMOS chip is also much smaller than a bipolar

chip, allowing very sophisticated circuitry to be

placed in less space. The small chip size also contrib-

utes to lower physical stress and less power con-

sumption.

Installation

Consider temperature coefficients of Hall IC and

magnetics, as well as air gap life time variations. Ob-

serve temperature limits during wave soldering.

Application Comments

If reverse supply protection is desired, use a resistor

EMC conditions, use the application circuit below.

Applications Examples

Two Wire Optional Current

Biasing Circuit

R

L

R

b

Hall

IC

Iout

V

DD

The resistors R

the part specification for limiting values. This circuit will help in getting the

precise ON and OFF currents desired.

B

B

I

IN

Automotive and Severe

Environment Protection Circuit

Hall IC

C1

C2

4.7nF

V

DD

Vss

OUT

R

L

1.2K

Supply

Voltage

D1

R

Z1

4.7 nF