This part is a kind of semiconductor called AD100-8.

Function of this product has APD.

Manufacturers : First Sensor

Image and pinout :

Some of the text within the PDF file :

First Sensor APD Data Sheet Part Description AD100-8 SMD Order # 501810; 501811; 501812 Version 28-10-11 Features • APD with 0.008 mm² active area • 100 µm diameter active area • High gain at low bias voltage • Fast rise time, low capacitance • Optimum gain: 50-60 Description Circular active area APD chip with 100µm diameter. Ceramic carrier type non hermetic SMD package with clear glass or filter window. Reflow solderable. Application • Laser range finder • High speed photometry • High speed optical communications • Medical equipment RoHS 2002/95/EC Absolute maximum ratings Symbol Parameter Min Max TSTG TOP Mmax Storage temp Operating temp Gain (IP0 = 1 nA) -40 100 -20 70 200 IPEAK Peak DC current 0.25 Schematic PIN 1 Unit °C °C mA PIN 3 Spectral r [ ... ]

AD100-8 PDF Datasheet Download