AS5115-HSST-500 austriamicrosystems, AS5115-HSST-500 Datasheet - Page 11

• Manufacturer Part Number: AS5115-HSST-500
• Description: IC ENCODER ROTARY 16-SOIC
• Manufacturer: austriamicrosystems
• Type: Linear, Rotary - Programmabler

Specifications of AS5115-HSST-500

• Sensing Range: 20mT Trip, 80mT Release
• Voltage - Supply: 4.5 V ~ 5.5 V
• Current - Supply: 28mA
• Current - Output (max): 1mA
• Output Type: Analog, Digital
• Features: High Precision
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 16-SSOP (0.200", 5.30mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: AS5115-HSST-500TR; AS5115-HSSU

AS5115
Preliminary Data Sheet - D e t a i l e d D e s c r i p t i o n
7.1.4 Angle Error vs Radial and Axial Misalignment
The angle error is the deviation of the actual angle vs. the angle measured by the encoder. There are several factors in the chip itself that
contribute to this error, mainly offset and gain matching of the amplifiers in the analog signal path. On the other hand, there is the nonlinearity of
the signals coming from the Hall sensors, caused by misalignment of the magnet and imperfections in the magnetic material.
Ideally, the Hall sensor signals should be sinusoidal, with equal peak amplitude of each signal. This can be maintained, as long as all Hall
elements are within the linear range of the magnetic field Bz
(see Figure
4).
7.1.5 Mounting the Magnet
Generally, for on-axis rotation angle measurement, the magnet must be mounted centered over the IC package. However, the material of the
shaft into which the magnet is mounted, is also of big importance.
Magnetic materials in the vicinity of the magnet will distort or weaken the magnetic field being picked up by the Hall elements and cause
additional errors in the angular output of the sensor.
Figure 7. Magnetic Field Lines in Air
Figure 7
shows the ideal case with the magnet in air. No magnetic materials are anywhere nearby.
Figure 8. Magnetic Field Lines in Plastic or Copper Shaft
www.austriamicrosystems.com
Revision 1.5
11 - 24