iC-TW28 QFN32-5x5

10-Bit Sin/Cos Interpolator w. Auto-Calibration & Line Driver

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Product description

The iC-TW28 is a fast 10-bit interpolator for sine/cosine signals with automatic signal adaption and error correction to maintain minimum angular error and jitter.

Up to 1024 increments per input cycle can be configured for incremental ABZ output. Besides, iC-TW28 can provide UVW commutation signals, and angle and multi-cycle data for embedded applications using SPI.

Configuration is possible by pins, SPI or EncoderLink. Pushing a button triggers signal adaption and storage to the chip's EEPROM.

Features

  • Differential PGA inputs for sine, cosine, and index
  • Input frequency of up to 700 kHz
  • AB output frequency of up to 12.5 MHz
  • Automatic compensation of amplitude, offset, and phase errors
  • Low latency (typ. 1.5 µs)
  • Differential RS422 line driver outputs for ABZ or UVW
  • Simultaneous single-ended outputs for ABZ and UVW
  • Digital filtering for ultra-low output jitter
  • Complete status and fault monitoring capabilities
  • Configured by pins or SPI
  • In-field re-configuration via Encoder Link interface
  • Easy to use with built-in line driver, EEPROM, and oscillator
  • Push-button automatic calibration for fast commissioning
  • LED intensity control by PWM output
  • 10-bit angle data and 14-bit multi-cycle counter available to SPI
  • Capture register for coded reference marks and touch-probe applications
  • Space-saving 5 x 5 mm QFN package
  • Single 3.3 V supply

Applications

  • Rotary and linear encoders
  • Magnetic or optical sin/cos sensor interface
  • Brushless motor commutation (2...64 poles)
  • Imbedded motion control
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