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 Switch FET and precision voltage-divider network are 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 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. By Maxim Integrated Products