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DS1842：76V, APD, Bias Output Stage with Current Monitoring

DS1842 Combines with DS1843 to Improve Integration and Lower Cost in APD Biasing

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.

Key Features 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

DS1842: Typical Application Circuit Applications/Uses APD Biasing GPON Optical Network Unit and Optical Line Transmission

DataSheet

Parametrics

Quality and Environmental Data

• DS1842.pdf

Related Products

• DS1843：Fast Sample-and-Hold Circuit
• DS1875：PON Triplexer and SFP Controller
• DS1863：Burst-Mode PON Controller With Integrated Monitoring
• MAX4004：High-Accuracy, High-Side Current Monitors in SOT23
• MAX4007：High-Accuracy, 76V, High-Side Current Monitors in SOT23

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