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Maxim Integrated
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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.
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
76V, APD, Bias Output Stage with Current Monitoring
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76V, 300mW Boost Converter and Current Monitor for APD Bias Applications ( Rev : 2010_03 )
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