Fast Current Mirror
Provides Optimized APD Bias and Mirror for PON Applications
DescriptionThe 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 (4.4mA 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.
- Wide Voltage Input Range: 2.97V to 76V
- Current Monitor
- Wide 250nA to 2mA Range
- 5:1 Mirror Ratio
- Fast 50ns Time Constant
- Current Clamp (4.4mA or 20mA, typ)
- Voltage Clamp Protects Subsequent Output Circuitry
- 6-Pin SOT23 (MAX4007 Compatible)
- Avalanche Photodiode (APD) Biasing
- GEPON, GPON, 10GEPON, XGPON: ONU and OLT
- PIN Photodiode Monitoring
|Part Number||Photo Diode Appl.||IDIODE||IDIODE||VBIAS|
|-40 to +85||$0.63 @1k|
|Device||Fab Process||Technology||Sample size||Rejects||FIT at 25°C||FIT at 55°C||Material Composition|