KMT36H-TD Measurement Specialties Inc/Schaevitz, KMT36H-TD Datasheet

SENSOR ANGULAR 360 DEGREES TDFN8

KMT36H-TD

Manufacturer Part Number
KMT36H-TD
Description
SENSOR ANGULAR 360 DEGREES TDFN8
Manufacturer
Measurement Specialties Inc/Schaevitz
Datasheet

Specifications of KMT36H-TD

Position - Sensing
360°
Sensor Type
Angular - Magnetoresistive
Voltage - Supply
12V
Operating Temperature
-40°C ~ 125°C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
356-1084-2
G-MRCO-021
KMT36H 360° Angular Sensor
DESCRIPTION
The KMT36H is a magnetic field sensor utilizing the anisotropic magneto resistance effect. Therefore
the sensor is sensing the magnetic field direction rather than the magnetic field strength. The sensor
contains three Wheatstone bridges rotated by 120°. A rotating magnetic field (typical strength 25 kA/m
in the sensor plane) will result in three sinusoidal output signals with a period of 180° , phase shifted by
60° field angle. By use of a modified atan algorithm the field angle can be calculated with high
accuracy.
As an unique feature, the KMT36H is able to measure full 360° by utilizing an additional magnetic field
which is generated by a planar coil that is integrated on the chip. The 180° /360° determination is done
by a simple sign distinction and may be computed periodically or only once at power up.
FEATURES
KMT36H Rev 2
Ideal for harsh environments due to
magnetic sensing principle
Contactless absolute angular measurement
over 360°
Accuracy better than +/- 0.5°
Three bridge signals with 120° phase
difference
Tiny TDFN-housing 2.5 x 2.5 x 0.8 mm
www.meas-spec.com
3
1/6
APPLICATIONS
Absolute angle measurement
Potentiometer replacement
Motor motion control
Camera positioning
Robotics
AMR Sensor with 360° capability
TDFN outline 2.5x2.5x0.75 mm
Three 120° phase-shifted signals
Moderate field strength requirements
3
august_2010

Related parts for KMT36H-TD

KMT36H-TD Summary of contents

Page 1

... By use of a modified atan algorithm the field angle can be calculated with high accuracy unique feature, the KMT36H is able to measure full 360° by utilizing an additional magnetic field which is generated by a planar coil that is integrated on the chip. The 180° /360° determination is done by a simple sign distinction and may be computed periodically or only once at power up ...

Page 2

... KMT36H 360° Angular Sensor CHARACTERISTIC VALUES Parameter Condition Mechanical dimensions - TDFN Length Width Height Mechanical dimensions - SO8 Length Width Height Operating limits Supply voltage Coil current Operating temperature Storage temperature Parameter Condition Sensor specification Applied magnetic field 2), 3) Bridge resistance ° ...

Page 3

... KMT36H 360° Angular Sensor BLOCK DIAGRAM V + COIL COIL V O3 Figure 1: internal and external connections (TDFN and SO8, Chip) SENSOR OUTLINE KMT36H Rev The sensitive area is positioned in the center of the housing. Figure 2: SO8 outline www.meas-spec.com 3 GND august_2010 ...

Page 4

... KMT36H 360° Angular Sensor Pin Assignment for TDFN and SO8: Pin Symbol Function 1 V signal output GND negative supply voltage 3 V positive supply voltage signal output positive coil input COIL not connected negative coil input COIL 8 V signal output 3 O3 ...

Page 5

... KMT36H 360° Angular Sensor TYPICAL PERFORMANCE CURVES 0 90 180 field angle in deg V1 = Vo2-Vo1 V2 = Vo3-Vo2 Figure 3: output voltages SIGNAL EVALUATION 180° EVALUATION As output voltages ( use the three possible differences between the three signal outputs (see fig. 3). At first the true offsets must be subtracted from the raw signals. The field angle 180° ...

Page 6

... KMT36H 360° Angular Sensor APPLICATION EXAMPLE Figure 5: An exemplary hardware configuration using an Atmel ATtiny44 microcontroller ORDERING CODE DEVICE KMT36H KMT36H/SO SO8 (References: JEDEC MS-012) ORDERING INFORMATION Measurement Specialties, Inc. 1000 Lucas Way Hampton, VA 23666 Tel: 1-800-555-1551 Fax: 1-757-766-4297 Email: sales@meas-spec.com Web: www.meas-spec.com The information in this sheet has been carefully reviewed and is believed to be accurate ...

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