150 Mbps Receiver.Sevastopol, CriMiCo presentation

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150 Mbps Receiver.Sevastopol, CriMiCo presentation

  1. 1. 150Mbps PDIC Receiver Oleksiy Pazyuk, Sevastopol, 14 September 2010
  2. 2. Multimedia communication
  3. 3. Melexis Automotive Optoelectronic Products Compatible to SMD solder processes and ambient temperatures -40C to +125C Anti-Glare Mirror Light-to-Frequency Converter MLX75304 Switch & Rotary Buttons Steering Controls Optical Switch MLX75303 Console Light Control Display Brightness Control Light-to-Voltage/Frequency Converter MLX75304/305 Rain Sensor ASIC Sunload Sensor ASIC Headlight Control Light-to-Frequency Converter MLX75304 Fuel Composition Analysis Linear Array MLX90255 Exterior view: Night Vision Adaptive Cruise Control Lane Departure Warning Traffic Sign Recognition Interior view: Driver Drowsiness Smart Airbag Deployment Camera MLX75307 APPLICATION FUSION Steering Wheel Angle Sensing Steering Wheel Torque Sensing Linear Array MLX90255, ASIC Optical Switch MLX75303 Key-less Entry Optical Switch MLX75303
  4. 5. MOST network diagram
  5. 6. MOST transmitter MLX75604 MLX75605 Heaven pigtail for Transmitter (RC)LED
  6. 7. MOST Receiver MLX75603 MLX75605 Heaven pigtail for Receiver
  7. 8. Main MOST Receiver parameters <ul><li>BitRate – 150Mb/s </li></ul><ul><li>Input optical range -24dBm…-2dBm </li></ul><ul><li>Rise/Fall time – 1ns </li></ul><ul><li>LVDS output </li></ul><ul><li>Operation current - less than 30mA </li></ul><ul><li>Sleep current - less than 30uA </li></ul><ul><li>Supply 3.3V </li></ul><ul><li>Temperature -40 … +95C </li></ul>
  8. 9. Receiver blockdiagram Analog Part Digital Output TIA PA DC offset compensation and CMF B LVDS driver WakeUp block Charge Pump
  9. 10. Advanced Features <ul><li>Integrated Photo diodes </li></ul><ul><li>Use of a negative CP to decrease input capacitance/increase bandwidth </li></ul><ul><li>AGC provide wide dynamic range -26 … -2 dBm </li></ul><ul><li>High input sensitivity -26dBm </li></ul><ul><li>Fully differential architecture </li></ul>Analog Part Digital Output TIA PA DC offset compensation and CMFV LVDS driver WakeUp block Charge Pump
  10. 11. MLX75603 Layout Diameter -1.1mm response – 0.4A/W
  11. 12. Shunt feedback TIA with gain control
  12. 13. Differential TIA with single ended PhotoDetector. Offset compensation.
  13. 14. Characterization setup
  14. 15. -40…+95C Eyediagrams.
  15. 16. Maximum sensitivity - 26 dBm input optical power!!! BitRate 150Mb/s but UI=3.3ns
  16. 17. Ethernet application <ul><li>- point-to-point link was evaluated; </li></ul><ul><li>- stable connection through a 70m POF fiber give; </li></ul><ul><li>- main limiting factor mode dispersion of the 1mm POF fiber </li></ul>
  17. 18. Links and references <ul><li>http://intranet.melexis.com/randd/Development%20Team/Development%20Team%20Kiev/presentations-trainings/technical/150Mbps_PDIC_RECEIVER.pdf </li></ul><ul><li>MOST presentation of Melexis on 9th MOST Interconnectivity conference </li></ul>
  18. 19. Small things make a big difference.
  19. 20. Additional data for information only (Not presented during meeting, except direct questions)
  20. 21. 90deg Bending solution to reduce loop height Fiber goes first vertically and then horizontally creating a big space about product PCB SMD FOT
  21. 22. Bandwidth of TIA <ul><li>High bandwidth – noise causes errors; </li></ul><ul><li>Low bandwidth – intersymbol interference causes errors; </li></ul><ul><li>Good trade off – Bandwidth = 2/3 BitRate; </li></ul><ul><li>Bandwidth of TIA is determined by next formula </li></ul>
  22. 23. Data Bandwidth
  23. 24. Comparison of Fast Ethernet and MOST 150 Requirements. Data coding
  24. 25. Comparison of Fast Ethernet and MOST 150 Requirements. Transmitter output
  25. 26. Comparison of Fast Ethernet and MOST 150 Requirements. Receiver output
  26. 27. <ul><li>Amplifier noise mostly determine sensitivity. </li></ul><ul><li>For TIA with bipolar transistor input noise: </li></ul><ul><li>Where: C D is PhotoDiode capacitance </li></ul><ul><li> R b is base resistance </li></ul><ul><li> R f is the transimpedance of TIA </li></ul><ul><li> I c is the collector current of input transistor </li></ul>Bipolar TIA single stage noise
  27. 28. Automotive Applications

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