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iC-LG    21-Bit Optical Position Encoder with Serial/Parallel and Sin/Cos Output

Applications
  • Optical high-resolution absolute position decoding
  • Analog and digital motorfeedback systems
Features
  • Excellent matching and reliability granted by system-on-chip design with integrated photosensors
  • Differential track evaluation and signal- related hysteresis comparators grant EMI immunity and operation up to 125 °C
  • High assembly tolerance due to synchronized scanning principle using pre- and post-positioned photosensors
  • 13 digital tracks pitched at just 500 μm
  • 2 sine/cosine analog tracks with enlarged photosensors and electronic calibration features
  • Position data resolution of 16 to 21 bits by on-chip interpolation (by 3-bit flash or 8-bit S&H ADC)
  • Services external multiturn encoders and interpolation ICs
  • LED power control with a 50 mA highside driver
  • Adjustable on-chip temperature sensor with a min/max alarm
  • Operational monitoring with alarm output for missing code, EEPROM link error, illumination error (end of life), out-of range temperature
  • Output modes: parallel encoder, serial BiSS/SSI, μC
  • 4 to 5.5 V single supply operation, low power consumption
  • Options: extended temperature range of -40 to +125 °C, customized COB assemblies, reticles and code discs
Packages
    lg21c_3d
    lg5c_3d
Block Diagram
Blockdiagram
 
Product Overview
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