PRODUCT INFORMATION

HAL 2xy

April/2009

All information and data contained in this product information are without any commitment, are not to be consid-

ered as an offer for conclusion of a contract, nor shall they be construed as to create any liability. Product or

development sample availability and delivery are exclusively subject to our respective order confirmation form. By

this publication, Micronas GmbH does not assume responsibility for patent infringements or other rights of third

parties which may result from its use.

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Tel. +49-761-517-0

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without the express written consent of Micronas GmbH.

Edition April 6, 2009; Order No. PI000010_002EN

Available Types and Behavior

Type

Switching Behavior

Sensitivity

Power-on and Undervoltage Reset

HAL 201

unipolar

low

–

HAL 202

latching

high

–

HAL 203

latching

medium

–

HAL 204

latching

low

–

HAL 206

unipolar

high

–

HAL 207

unipolar

low

–

HAL 208

unipolar

medium

–

HAL 210

unipolar

high

–

HAL 220

latching

high

•

HAL 221

unipolar

low

•

System Architecture

The Hall-effect sensor is a monolithic inte-

grated circuit that switches in response to

magnetic fields. If a magnetic field with flux

lines perpendicular to the sensitive area is

applied to the sensor, the biased Hall plate

forces a Hall voltage proportional to this

field. The Hall voltage is compared with the

actual threshold level in the comparator.

The temperature-dependent bias is used to

compensate the decreasing induction of

magnets at higher temperatures. If the mag-

netic field exceeds the threshold levels, the

open-drain output switches to the appropri-

ate state. The built-in hysteresis eliminates

oscillation and provides switching behavior

of output without bouncing.

Magnetic offset caused by mechanical

stress is compensated for by using the

“switching offset compensation technique”.

HAL 2xy

Temperature

Dependent

Bias

Switch

Hysteresis

Control

Comparator

Output

1

OUT

3

Clock

Hall Plate

GND

2

Short Circuit &

Overvoltage

Protection

Reverse

Voltage &

Overvoltage

Protection

Fig. 1: Block diagram of the HAL 2xy