Based on the existing inductive resonator position detection technology, Cambridge IC has developed a new sensor processor with a scalable high-resolution quadrature encoder output (ABN/ABZ). Both the sensor and the position target are made of easily available circuit board material (e.g. FR4) with printed coils. The sensor board has electrical connections to CAM622 circuitry. The target is passive and contactless. Only two small capacitors must be fitted here to build an inductive resonator. This design enables an extremely compact construction.
The CAM622 sensor processor is embedded inside a customer’s product. It includes an SPI interface used for programming parameters including the number of AB cycles, and position of the N pulse. The maximum number of AB cycles is 16384, to yield 65536 edges per revolution and 16-bit resolution.
The CAM622’s SPI interface may also be used to read measurement results directly, including absolute position and diagnostics.
No calibration is necessary. The CAM622 measures position 33,000 times per second, at rotation rates of up to at least 60,000 rpm.
For evaluation the CAM622 ABN Board is available. It connects to a Windows PC via an adapter for programming and evaluation. It includes a regulator and line driver for stand-alone differential ABN operation from a 5V supply.
If you would like to know more about the inductive sensor IC CAM622, please contact:
Guido Gandolfo
Product Line Manager
Motion Control
+49 5424 2340-57
ggandolfo@mev-elektronik.com
