TPS721A

The TPS721A is a kind of silicon PN photo diode. It is light receiving device for plastic fiber/polymer clad fiber. There are some features as follows: (1)small dark current: ID=0.5 nA typ; (2)high current transfer ratio: Sf=0.36 A/W typ; (3)high speed application is possible: fc=70 MHz typ.

What comes next is about the maximum ratings of TPS721A (Ta=25): (1)reverse voltage, VR: 50 V; (2)power dissipation, PD: 150 mW; (3)operating temperature range, Topr: -30 to 85; (4)storage temperature, Tstg: -40 to 100.

The following is about the electrical characteristics of TPS721A (Ta=25): (1)dark current, ID: 0.5 nA typ and 8 nA max at VR=10 V; (2)fiber coupling sensitivity, Sf: 0.33 A/W min and 0.36 A/W typ at VR=10 V, =660 nm, Pf=1 W; (3)peak sensitivity wavelength, P: 840 nm typ at VR=10 V; (4)directional angle half value width, 1/2: ±65° typ; (5)capacitance between terminals, CT: 10 pF typ at VR=10 V, f=1 MHz; (6)switching time: rise time, tr: 4 ns typ at VR=10 V, RL=50; fall time, tf: 4 ns typ at VR=10 V, RL=50; (7)cut-off frequency, fc: 70 MHz typ at VR=10 V, RL=50.