iC-TW29: Dual Angle Sensor Demo Board PVL3M 09.06.2020
Demo Board for Magnetic On-Axis Serial Absolute Multiturn Encoder
PVL3M Eval
High-resolution magnetic on-axis angle encoder with automatic error correction and battery-buffered multiturn counter.

The new development board PVL3M provides an XMR sensor (AMR angle sensor AA746C from Sensitec) in combination with the multiturn Hall sensor iC-PVL from iC-Haus for on-axis absolute angle measurement and revolution counting.

Evaluation of the two sensors is performed by the new 26-bit encoder signal processor iC-TW29 with integrated EEPROM. The sine/cosine signals from the XMR sensor are processed in the chip, interpolated, and output with an arbitrarily selectable single-turn resolution. The iC-PVL provides battery-backed multiturn position to the iC-TW29 via its Absolute Data Interface (ADI). This combination can be used to make a magnetic multiturn serial absolute encoder. For example, a BiSS encoder with an angular resolution of 17 bits and 24 revolution counting bits is possible. Signal processing time is only 5 μs, which is very close to that of optical encoders. Simultaneously, Auto Calibration in the iC-TW29 corrects the sine/cosine signal errors ensuring high measurement accuracy over temperature or with axial play of the motor shaft.
Position output via SPI or incremental quadrature signals with index at any arbitrary
resolution (FlexCount®) from 1 to 32,768 CPR is also possible.

Magnetic angle encoder based on PVL3M and iC-TW29

Requiring a single-sided supply of +3.3 V, the sensors as well as the iC-TW29 operate over an industrial operating temperature range of –40 to +125 °C. As for external circuitry, only a few components are required; typically just a voltage regulator and a transceiver for data communication (BiSS/SSI) are needed.
The iC-TW29 is housed in a space-saving 32-pin QFN package which requires only 5 mm x 5 mm on the PCB. For sampling purposes, ready-to-use demo boards (which can also serve as programming adapters) and a PC operating program (GUI) are available.

Read more and download the datasheet:
Product iC-TW29
Product PVL3M
Product Overview
Application Guide