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19-4994; Rev 0; 10/09
KIT ATION EVALU LE B A IL A AV
76V, APD, Bias Output Stage with Current Monitoring
General Description 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 ♦ Precision Voltage Feedback ♦ Multiple External Filtering Options ♦ 3mm x 3mm, 14-Pin TDFN Package with Exposed Pad
DS1842A
The DS1842A integrates the discrete high-voltage components necessary for avalanche photodiode (APD) bias and monitor applications. A switch FET and precision voltage-divider network are used in conjunction with an external DC-DC controller to create a boost DC-DC converter.