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DS1842 - Bias Output Stage

General Description

The DS1842 integrates the discrete high-voltage components necessary for avalanche photodiode (APD) bias and monitor applications.

A switch FET is used in conjunction with an external DC-DC controller to create a boost DC-DC converter.

Key Features

  • an external shutdown. The device also includes a dual current mirror to monitor the APD current.
  • 76V Maximum Boost Voltage.
  • Switch FET.
  • Current Monitor with a Wide 1µA to 2mA Range, Fast 50ns Time Constant, and 10:1 and 5:1 Ratio.
  • 2mA Current Clamp with External Shutdown.
  • Multiple External Filtering Options.
  • 3mm x 3mm, 14-Pin TDFN Package with Exposed Pad Features DS1842.

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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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19-4557; Rev 0; 4/09 www.DataSheet4U.com 76V, APD, Bias Output Stage with Current Monitoring General Description The DS1842 integrates the discrete high-voltage components necessary for avalanche photodiode (APD) bias and monitor applications. A switch FET is used in conjunction with an external DC-DC controller to create a boost DC-DC converter. A current clamp limits current through the APD and also features an external shutdown. The device also includes a dual current mirror to monitor the APD current.