US4881

CMOS Low Voltage High Sensitivity Latch

Preliminary Datasheet

US4881 CMOS Low Voltage High Sensitivity Latch

3901004881 Rev 1.5

24/July/01

Page 5

Unique Features

CMOS Hall IC Technology

The chopper stabilized amplifier uses switched

capacitor techniques to eliminate the amplifier

offset voltage, which, in bipolar devices, is a

major source of temperature sensitive drift.

CMOS makes this advanced technique possi-

ble. The CMOS chip is also much smaller than

a bipolar chip, allowing very sophisticated cir-

cuitry to be placed in less space. The small chip

size also contributes to lower physical stress

and less power consumption.

Installation Comments

Consider temperature coefficients of Hall IC and

magnetics, as well as air gap and life time varia-

tions. Observe temperature limits during wave

soldering.

Application Comments

If reverse supply protection is desired, use a re-

For severe EMC conditions, use the application

circuit below.

Applications Examples

Automotive and Severe

Environment Protection Circuit

Hall IC

C1

4.7n

F

C2

4.7n

F

V

DD

V

SS

OUT

R

L

1.2

K

Supply

Voltage

D1

R

Z1

Two Wire Optional Current

Biasing Circuit

R

L

R

b

Hall

IC

Iout

V

DD

The resistors R

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

the precise ON and OFF currents desired.

B

B

I

IN