8-Bit Sin/Cos Interpolator with RS422 Driver

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Product description

iC-MG is a real-time vector-tracking sine/cosine-to-digital converter with an angle resolution of up to 200.

The angle is output via fail-safe RS422 drivers as an encoder quadrature signal with index, glitch-free at a guaranteed minimum edge distance.

The signal-conditioning analog front-end takes differential or single-ended signals (current-to-voltage conversion is optional) and allows the correction of common signal errors. All device functions are monitored, improper operation can be alarmed.


  • Real-time no-missing-code interpolation of x1, x2, x4, x5, x8, x10, x16, x20, x25, x50
  • High input frequency: 500 kHz at x1/x2, 200 kHz at x4/x5, 100 kHz at x10, 20 kHz at x50
  • Excellent accuracy (typ. 0.6  LSB) and repeatability (typ. 0.1 LSB)
  • Differential PGA inputs with selectable input resistance for voltage and current signals
  • Adjustable signal conditioning for offset, amplitude, phase
  • Unique signal and calibration stabilization feature: supply of encoder LED or MR bridge via controlled 40 mA current source
  • Fail-safe RS422 encoder quadrature outputs with index signal
  • Adjustable index position and length (from 1/4 to 1 T)
  • Preselectable minimum phase distance for fail-safe counting
  • Clipping, loss-of-signal and loss-of-tracking indication
  • Setup via serial EEPROM interface
  • Sub-system power switch offers reverse polarity protection for the overall system
  • Single 5 V supply, operation from -25 °C to +100 °C


  • Optical and magnetic position sensors
  • Rotary encoders
  • Linear encoders
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