The evaluation kit allows to learn how different factors impact on the resolution of the measurement signal (length of magnetic pole pitch, interpolation factor, etc.)
As a rule of a thumb the distance between the sensor chip and the surface of the pole wheel must not exceed 50% of the magnetic pole length.
The EBK7000 was developed as an extension board for an Arduino microcontroller system. This provides an opportunity for software adjustment of gain and interpolation factor. Analog and digital sensor signals can be received and processed by the microcontroller.
Signal processing of MR sensor signals is realized by an interpolation ASIC. Basis of the signal conditioning are amplifiers, A/D converters and logic functions. The output signals of the MR sensor are amplified in order to operate the A/D converter in an optimal range. The change of the sensor signal is converted to a square wave with 90 degrees phase shift between sine and cosine channel and the set resolution. Interpolation is a multiplication of the basic period of the System.