HL KMT32B DATA SHEET

MAGNETIC ANGLE SENSOR
KMT32B

Preliminary
HLP Confidential

Preliminary Data Sheet

KMT32B

Axel Bartos

HL PLANARTECHNIK GmbH • Hauert 13 • 44227 Dortmund • Germany • www.hlplanar.de

[e-mail] • phone: [phone] • fax: [phone]

KMT32B_PreliminaryDataSheet (2004-04-13).doc Last update 13.04.04

Vcc2

Br.2

Br.1

Vcc

MAGNETIC ANGLE SENSOR
KMT32B

Preliminary
HLP Confidential

LEGAL DISCLAIMER

This product is not designed for use in life support appliances, devices or systems where malfunction of this product can
reasonably be expected to result in personal injury. HL Planartechnik GmbH customers using or selling this product for use in such
applications do so at their own risk and agree to fully indemnify HL Planartechnik GmbH for any damages resulting from such
improper use or sale.

This data sheet contains target specifications for product development which my be subject to changes without notice.

GENERAL DESCRIPTION

The KMT32B is a magnetic field sensor based on the anisotropic magnetoresistance effect. The sensor
contains two parallel supplied Wheatstone bridges, which enclose a sensitive angle of 45 degrees.

A rotating magnetic field in the surface parallel to the chip (x-y plane) will deliver two independent
sinusoidal output signals, one following a cos(2α) and the second following a sin(2α) function, α being
the angle between sensor and field direction (see figure 2).

15

10

5

y

0

0 90 180 270 360

-5

Uo/Ucc [mV/V]

-10

-15

[deg]

αααα

bridge 1 (cosine) bridge 2 (sine)

α

field direction

Fig. 2

Figure 1: Characteristic curves for KMT32B

The KMT32B is suited for high precision angle measurement applications under low field conditions
(regular 25 kA/m, with reduced accuracy applicable down to 8 kA/m; beware of earth’s magnetic field !).

CIRCUIT DIAGRAM

Fig. 3

-Vo1

GND

+Vo1

1

-Vo2

-Vo2

HL PLANARTECHNIK GmbH • Hauert 13 • 44227 Dortmund • Germany • www.hlplanar.de

[e-mail] • phone: [phone] • fax: [phone]

KMT32B_PreliminaryDataSheet (2004-04-13).doc Last update 13.04.04