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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.

📥 Download Datasheet

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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.

View original datasheet text
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.