Versatile intelligent system-on-chip sensors with integrated blue LED for optical scanning of scales in rotary and linear position measuring systems
The iC-PZ Series from iC-Haus offers functions required for high-resolution optical linear and angular encoders. The blue LED that is positioned between two integrated scanning fields on the iC-PZ device provides wide mechanical assembly tolerances and high precision and reliability.
Available in three variations, the iC-PZ device is suitable for a wide range of
disk and motor diameters (16 mm to 6.71 m). For miniature drives, the iCPZ0974 is available for only 9 mm. Using a disk diameter of 26 mm, singleturn resolutions of up to 22 bits are possible using on-chip interpolation.
The configurable FlexCount® and FlexCode® functions provide high flexiblity to ABZ resolutions and disk diameters. This reduces the development and testing required for encoder solutions within a device series. Now, the universal sensor platform can easily be reused without having to modify the electronics for different encoder variations, thus saving time and costs.
The miniaturized design is realized in a 0.9 mm flat QFN32 package (5 mm x 5 mm). Therefore, the device is the ideal solution for miniaturization in industrial automation, such as robotics, compact motor feedback systems, and electric micro drives.
The permissible mechanical assembly tolerances of the iC-PZ encoder chips is also
improved. For a disk with a diameter of 26 mm, the tolerances are ±0.5 mm
(tangential), ±0.4 mm (radial) and ±2° (rotation). A working distance of 1 to 2 mm between sensor chip and disk is permissible. These large tolerances reduce time
and cost for installation and adjustment of the iC-PZ. In addition, the encoder
solutions are extremely rugged, even against mechanical disturbances.
The calibration and configuration data is stored in an external I2C EEPROM. The chip operates from a supply of 4.5 to 5.5 V over an operating temperature range of –40 to +125 °C and is thus suitable for a wide range of industrial applications.
Intelligent On-Chip Adjustments
The highly integrated sine/digital converter with intelligent on-chip adjustment
functions automatically compensates for build-up-related signal errors. Due to internal automatic adjustment of offset, amplitude and phase difference of the sin/cos signals, high quality interpolated signals are achieved.
The available interfaces of the iC-PZ are designed for maximum flexibility in
application. Three out of the five output interfaces can be freely selected simultaneously: ABZ quadrature signals, analog sin/cos for processing with an external interpolation module, UVW, SPI, and BiSS/SSI.
Evaluation Kit Simplifies Implementation
Using the evaluation kit PZ1M, the PZ1D motherboard and the flexible iC-Haus software, electronics developers can now quickly test the iC-PZ and integrate it into their applications.