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DS1862 - XFP Laser Control and Digital Diagnostic IC

Description

The DS1862 is a closed-loop laser-driver control IC with built-in digital diagnostics designed for XFP MSA.

The laser control function incorporates average power control (APC) and allows extinction ratio control though a temperature indexed look-up table (LUT).

Features

  • Implements XFP MSA Requirements for Digital Diagnostics, Serial ID, and User Memory.
  • I2C-Compatible Serial Interface.
  • Automatic Power Control (APC).
  • Extinction Ratio Control with Look-Up Table.
  • Seven Monitored Channels for Digital Diagnostics (Five Basic Plus Two Auxiliary).
  • Internal Calibration of Monitored Channels (Temp, VCC2/3, Bias Current, Transmitted, and Received Power).
  • Programmable Quick-Trip Logic for Turning Off Laser fo.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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www.DataSheet4U.com Rev 0; 2/06 XFP Laser Control and Digital Diagnostic IC General Description The DS1862 is a closed-loop laser-driver control IC with built-in digital diagnostics designed for XFP MSA. The laser control function incorporates average power control (APC) and allows extinction ratio control though a temperature indexed look-up table (LUT). The DS1862 monitors up to seven analog inputs, including temperature and monitor diode (MD) current, which are used to regulate the laser bias current and extinction ratio. Warning and alarm thresholds can be programmed to generate an interrupt if monitored signals exceed tolerance. Calibration is also provided internally using independent gain and offset scaling registers for each of the monitored analog signals.
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