DS3920
Fast Current Mirror
Provides Optimized APD Bias
and Mirror for PON Applications
http://www.maxim-ic.com/datasheet/index.mvp/id/7291
The DS3920 precision current mirror is designed for avalanche photodiode (APD) and PIN photodiode biasing and monitoring applications. The device offers a current clamp to limit current through the APD and a current mirror output that produces a signal proportional (5:1) to the APD current. A diode is also provided to limit the voltage at the current mirror output.
The device accepts a +2.97V to +76V current mirror supply voltage. Internal current limiting (2.9mA or 20mA, typ) protects the monitored device from a short circuit to ground. The provided internal clamp diode protects the current mirror output from overvoltage. Additionally, the device features thermal shutdown if the die temperature reaches +150°C.
The device is available in a 6-pin SOT23 package, and operates over the -40°C to +85°C extended temperature range.
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