iC-TW2 QFN24

Progr. 8-Bit Sin/Cos Interpolation IC w. EEPROM

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Product description

iC-TW2 is a very compact sine/cosine-to-digital converter with an angle resolution of up to 256. Its interpolation engine accepts two fully differential sensor signals, as provided by MR sensors for instance, to generate an incremental encoder quadrature output signal with index.

Two serial interfaces permit configuration of the device, also accessing the internal EEPROM for a non-volatile setup.

Features

  • Programmable angle resolution from 1 to 256 steps per period
  • Interpolation factors from x0.25 to x64
  • Input frequency to 115 kHz with x64, to 230 kHz with x32, to 460 kHz with x16
  • Latency of less than 1 µs
  • Selectable gain permits single-ended and differential input signals from 10 mV to 1.5 V peak-peak
  • Index gating input with fine adjustable offset
  • Programmable index pulse output position and width
  • Four incremental output modes: quadrature encoder with index, up/down clock, incr./direction, 3 phase commutation
  • Programmable filter and hysteresis
  • Direct sensor connection, minimized count of external components
  • Non-volatile setup due to internal EEPROM
  • Fully re-programmable via serial 1- and 2-wire interfaces
  • Power-on reset circuit and on-chip oscillator
  • ESD protection and TTL-/CMOS-compatible outputs
  • Operation at 3.0 V to 5.5 V, from -40 °C to +125 °C

Applications

  • Interpolation IC for position data acquisition from analog sine/cosine sensors
  • Optical linear and rotary encoders
  • Magneto resistive sensors and encoders
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