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DS1842A：76V, APD, Dual Output Current Monitor

APD Bias Output Stage and Fast Current Monitor on a Single Chip

The DS1842A integrates the discrete high-voltage components necessary for avalanche photodiode (APD) bias and monitor applications. A precision voltage-divider network is used in conjunction with an external DC-DC controller and FET to create a boost DC-DC converter. A current clamp limits current through the APD and also features an external shutdown. The precision voltage-divider network is provided for precise control of the APD bias voltage. The device also includes a dual current mirror to monitor the APD current.

Key Features 76V Maximum Boost Voltage 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 Precision Voltage Feedback Multiple External Filtering Options 3mm x 3mm, 14-Pin TDFN Package with Exposed Pad

DS1842A: Typical Application Circuit Applications/Uses APD Biasing GPON ONU and OLT

DataSheet

Parametrics

Quality and Environmental Data

• DS1842A.pdf

Related Products

• DS1843：Fast Sample-and-Hold Circuit
• DS1842：76V, APD, Bias Output Stage with Current Monitoring
• DS1875：PON Triplexer and SFP Controller

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