HAL621SF-A 데이터 시트보기 (PDF) - Micronas

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HAL621SF-A

Hall Effect Sensor Family

Micronas 

HAL62x

Hall Effect Sensor Family

in CMOS technology

Release Notes: Revision bars indicate significant

changes to the previous edition.

1. Introduction

The HAL 62x family consists of different Hall switches

produced in CMOS technology. All sensors include a

temperature-compensated Hall plate with active offset

compensation, a filter, a comparator, and an open-drain

output transistor. The comparator compares the actual

magnetic flux through the Hall plate (Hall voltage) with

the fixed reference values (switching points). According-

ly, the output transistor is switched on or off. The sensors

of this family differ in their magnetic characteristics.

All sensors contain an enhanced internal signal proces-

sing for very high repeatability requirements of the out-

put signal. These sensors are the optimal solution for

CAM and crank sensor applications.

The active offset compensation leads to magnetic pa-

rameters which are robust against mechanical stress ef-

fects. In addition, the magnetic characteristics are

constant in the full supply voltage and temperature

range.

The sensors are designed for industrial and automotive

applications and operate with supply voltages from

4.2 V to 24 V in the ambient temperature range from

–40 °C up to 150 °C.

All sensors are available in the SMD-package (SOT-89B)

and in the leaded version (TO-92UA).

1.1. Features:

– switching offset compensation at typically 360 kHz

– signal processing with chopper stabilized filter

– operates from 4.2 V to 24 V supply voltage

– operates with static magnetic fields and dynamic mag-

netic fields up to 15 kHz

– overvoltage protection at all pins

– reverse-voltage protection at VDD-pin

– magnetic characteristics are robust against mechani-

cal stress effects

– short-circuit protected open-drain output by thermal

shut down

– constant switching points over a wide supply voltage

range

– ideal sensor for applications in extreme automotive

and industrial environments

– EMC and ESD optimized design

1.2. Family Overview

The types differ according to the magnetic flux density

values for the switching points and the mode of switch-

ing.

Type

621

629

Switching

Behavior

bipolar

unipolar

Sensitivity

very high

medium

see

Page

12

14

Note: The HAL 629 is the improved successor of the

HAL 628 with the same magnetic characteristics.

Bipolar Switching Sensors:

The output turns low with the magnetic south pole on the

branded side of the package and turns high with the

magnetic north pole on the branded side. The output

state is not defined for all sensors if the magnetic field is

removed again. Some sensors will change the output

state and some sensors will not.

Unipolar Switching Sensors:

The output turns low with the magnetic south pole on the

branded side of the package and turns high if the mag-

netic field is removed. The sensor does not respond to

the magnetic north pole on the branded side.

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