iC-TW29
26-Bit Encoder Processor with Interpolation and BiSS Interface
- Any output resolution with any input resolution
- Independently-programmed ABZ, UVW, and BiSS resolutions
- Absolute data interface for external revolution counters
Description
iC-TW29 is a complete solution for arbitrary resolution ST and MT encoders. Independent I/O modules provide BiSS C, ABZ, or UVW outputs separately or in combination. 1 to 4,096 input cycles/rev are converted into a freely scalable output angle of up to 26 bit. Automatic signal error correction ensures a minimum angular error and jitter. Off-center optical discs or magnetic polewheels can be compensated for eccentricity. Connecting a revolution counter is possible, to output multiturn absolute data on BiSS.
Types and Packages
- iC-TW29 QFN32-5×5, RoHS compliant MSL 1, 260°C
Features
- Any output resolution with any input resolution
- Independently-programmed ABZ, UVW, and BiSS resolutions
- Absolute data interface for external revolution counters
- BiSS C-Mode interface (Encoder Profiles 3, 3S, and 4)
- 26-bit single-turn position and 32-bit revolution count via SPI
- Four capture registers for coded reference marks and touch-probe applications
- Eccentricity compensation
- Input frequency up to 700 kHz
- AB output frequency of up to 12.5 MHz
- Differential RS422 line driver outputs for ABZ or UVW
- Simultaneous single-ended outputs for ABZ, UVW, BiSS
- Automatic compensation of amplitude, offset, and phase errors
- Digital filtering for ultra-low output jitter
- Encoder Link interface for in-field re-configuration
- Internal EEPROM and oscillator
- LED intensity control by PWM output
- Low latency (2.4 µs or 5.0 μs)
- Pin-compatible with iC-TW28
Application
- Rotary and linear incremental or absolute encoders
- Magnetic or optical sin/cos sensor interface
- Brushless motor commutation (2…64 poles)
- Imbedded motion control
