HAR2425 datasheet(4/33 Pages) MICRONAS

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HAR 24xy

DATA SHEET

July 14, 2015; DSH000170_001EN

Micronas

High-Precision Dual-Die Programmable Linear

Hall-Effect Sensor Family

Release Note: Revision bars indicate significant

changes to the previous edition.

1. Introduction

HAR 24xy is a dual-die programmable linear Hall-

effect sensor family. It provides redundancy as it con-

sists of two independent dies stacked in a single pack-

age, each bonded to a separate side of the leadframe.

The stacked-die architecture ensures that both dies

occupy the same magnetic field position, thus generat-

ing synchronous measurement outputs.

The integrated dies are two HAL 24xy, universal mag-

netic field sensors with linear analog or PWM outputs

based on the Hall effect. For both dies major charac-

teristics like magnetic field range, sensitivity, output

quiescent voltage (output voltage at B=0 mT), and out-

put voltage range are programmable in non-volatile

memories. The output characteristics are ratiometric,

which means that the output voltages are proportional

to the magnetic flux and the supply voltage. Addition-

ally, both dies offer wire-break detection.

Each die of the HAR 24xy offers 16 setpoints to

change the output characteristics from linear to arbi-

trary or vice versa. They feature temperature-compen-

sated Hall plates with spinning current offset compen-

sation, A/D converters, digital signal processing, D/A

converters with output driver (HAR 2425), programma-

ble PWM output modules (HAR 2455), EEPROMs with

redundancy and lock function for calibration data,

serial interfaces for programming the EEPROMs, and

protection devices at all pins. The internal digital signal

processing prevents the signal being influenced by

analog offsets, temperature shifts, and mechanical

stress.

The easy programmability allows individual adjustment

of each HAR 24xy during the final manufacturing pro-

cess by means of a 2-point calibration, by adjusting the

output signals directly to the input signal (like mechani-

cal angle, distance, or current). With this calibration

procedure, the tolerances of the sensor, the magnet-,

and the mechanical positioning can be compensated

in the final assembly.

In addition, the temperature compensation of the Hall

ICs can be fit to all common magnetic materials by

programming first- and second-order temperature

coefficients of the Hall sensor sensitivity.

It is also possible to compensate offset drift over tem-

perature generated by the customer application with a

first-order temperature coefficient for the sensors off-

set. This enables operation over the full temperature

range with a high accuracy.

The calculation of the individual sensors characteris-

tics and the programming of the corresponding

EEPROMs can easily be done with a PC and the appli-

cation kit from Micronas.

The sensors are designed for stringent industrial

and automotive applications and are AECQ100

qualified. They operate with typically 5 V supply volt-

age in the junction temperature range from

40 °C

up to 170 °C. The HAL 24xy is available in the ultra-

thin shrink small outline 14 leads package TSSOP14-

1.1. Major Applications

Thanks to its redundancy capability, HAR 24xy can

address safety-critical applications. The sensors’ ver-

satile programming characteristics and low tempera-

ture drifts make the HAR 24xy the optimal system

solution for:

– Angular measurements: throttle position, pedal

position, steering torque and EGR applications;

– Distance and linear movement measurements in

safety-critical applications

– Magnetic field and current measurement with spe-

cific resolution over different ranges, by appropriate

sensitivity programming for each die.

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