DS1842N+T&R

The DS1842N+T&R is a 76V, APD, bias output stage with current monitoring in 14 pin TDFN package. It 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 to DC controller to create a boost DC to 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. Typical applications include APD biasing and GPON optical network unit and optical line transmission.

• Maximum boost voltage is 76V
• Operating temperature range from -40°C to 85°C
• 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 option
• Switching frequency from 0 to 1.2MHz

Applications

Power Management

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party