Overview Interpolators Overview Encoder iCs

iC-NQL    13-Bit Signal Conditioning Interpolator with SSI Interface

Applications
  • Interpolator IC for position data acquisition from analog sine/cosine sensors
  • Optical linear/rotary encoders
  • MR sensor systems
Features
  • Resolution of up to 8192 angle steps per sine/cosine period
  • Binary and decimal resolution settings, e.g. 500, 512, 1000, 1024; programmable angle hysteresis
  • Conversion time of just 250 ns including amplifier settling
  • Count-safe vector follower principle, realtime system with 70 MHz sampling rate
  • Direct sensor connection; selectable input gain
  • Front-end signal conditioning (8 bit offset, 5 bit amplitude ratio, 6 bit phase)
  • 250 kHz input frequency
  • Absolute angle output via fast SSI interface
  • 24-bit on-chip multiturn counter
  • A QUAD B incremental outputs with selectable minimum transition distance (e.g. 0.25 μs for 1 MHz at A)
  • Index signal processing adjustable in position and width
  • Fault monitoring: frequency, amplitude, configuration (CRC)
  • Setup via serial EEPROM
  • ESD protection and TTL-/CMOS-compatible outputs
Packages
    TSSOP20
Block Diagram
Blockdiagram
 
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