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DS1873 - SFP+ Controller

General Description

The DS1873 controls and monitors all functions for SFF, SFP, and SFP+ modules including all SFF-8472 functionality.

The DS1873 provides APC loop, modulation current control, and eye safety functionality.

Key Features

  • Meets All SFF-8472 Control and Monitoring Requirements.
  • Six Analog Monitor Channels: Temperature, VCC, MON1.
  • MON4 MON1.
  • MON4 Support Internal and External Calibration Scalable Dynamic Range Internal Direct-to-Digital Temperature Sensor Alarm and Warning Flags for All Monitored Channels.
  • Four 10-Bit Delta-Sigma Outputs with 36 Entry Temperature LUTs Laser Bias Controlled by APC Loop and Temperature LUT to Compensate for Tracking Error Laser Modulation Con.

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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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19-4986; Rev 1; 11/09 KIT ATION EVALU E L B A AVAIL SFP+ Controller with Analog LDD Interface General Description The DS1873 controls and monitors all functions for SFF, SFP, and SFP+ modules including all SFF-8472 functionality. The DS1873 provides APC loop, modulation current control, and eye safety functionality. The DS1873 continuously monitors for high output current, high bias current, and low and high transmit power to ensure that laser shutdown for eye safety requirements are met without adding external components. Six ADC channels monitor VCC, temperature, and four external monitor inputs (MON1–MON4) that can be used to meet all monitoring requirements. MON3 is differential with support for common mode to VCC.