I got some samples of the AS5145 Automotive Rotary Encoder IC, and I did a quick test for positioning of the motor using its PWM output signal thru a low pass filter to get analog out signal.
The absolute angle measurement provides instant indication of the magnet's angular position with a resolution of 0.0879° = 4096 positions per revolution.
It also has SPI (serial interface) as well Quadrature A/B (10 or 12 bit) and Index output signal, that will test and present in future video.
http://www.ams.com/eng/Products/Magnetic-Encoders/Rotary-Encoders/AS5145H
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