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應用筆記-校準激光驅動器POT和DAC

  • 資源大?。?/b>23 K
  • 上傳時間: 2013-11-13
  • 上傳用戶:zzh20043668
  • 資源積分:2 下載積分
  • 標      簽: POT DAC 應用筆記 校準

資 源 簡 介

Abstract: A laser module designer can use a fixed resistor, mechanical pot, digital pot, or a digital-to-analogconverter (DAC) to control the laser driver's modulation and bias currents. The advantages of a programmablemethod (POT or DAC) are that the manufacturing process can be automated and digital control can be applied(e.g., to compensate for temperature). Using POTs can be a more simple approach than a DAC. There can be aslight cost advantage to using a POT, but this is usually not significant relative to other pieces of the design.Using a DAC can offer advantages, including improved linearity (translating to ease of software implementationand ability to hit the required accuracy), increased board density, a wider range of resolutions, a betteroptimization range, ease of use with a negative voltage laser driver, and unit-to-unit consistency

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