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FH3D02 Overview

1.3

Applications

− 3D position and orientation determination (using multiple devices)

o http://www.iis.fraunhofer.de/hallinmotion

− Magnetic field measurement in lab equipment

o http://www.iis.fraunhofer.de/hallinsight

− Mechanical position sensing in consumer and industrial applications

− Rotary encoder (standalone, PWM output)

− Linear positioning measurement

− Contactless angle measurement

− Current sensing

− Quality control

− Fluid level measurement

− 3D speed sensing

− Utility meters

− Current sensing

− Control knobs and selector switches

− 3D proximity sensing

− 3D valve positioning

REMARK: FH3D02 Dual 3D Hall sensors are not qualified for automotive applications.

If you would like to purchase qualified automotive devices, please contact LZE GmbH.

1.4

Functional Block Diagram

The sensor chip provides two 3D Hall pixels, which are supplied by an voltage regulator and are selected

by the sensor MUX. The analogue signal computation channel consists of a programmable gain amplifier

and offset centering, ΣΔ-modulator and a decimation register. The state machine controls voltage

regulator, sensor MUX, decimation, offset centering and performs a 4-phase measurement cycle and

temperature measurement. The decimation results are transmitted via a 4-wire SPI interface to a

connected SPI master.

Functional block diagram of the integrated sensor periphery

CLK

CS_ N

M OSI

Oscillator

4 Wire

SPI I n t er f a ce

Supply

Voltage

Regulator

Hall-

sen so r s

Sen so r-

MUX

Offset-

Cent ering

Pre-

Amp

Temperature

Sensor

4- Bi t ΣΔ-

Modulator

Decimator

Decimation

Setting

Amplification

Stat e Machine

LOCK_N

RESET_ N

SCE

LOPOWR

REA DY

M ISO