General Description
The VSC7709 integrated PIN Photodetector/Transimpedance Amplifier provides a highly integrated solution for converting 1300 nm light from a fiber optic communications channel into a differential output voltage. The benefits of Vitesse Semiconductor’s Gallium Arsenide H-GaAs process are fully utilized to provide a very high bandwidth and low noise amplifier. The PIN detector is 75µm in diameter. The detector bias is supplied internally eliminating the need for a separate bias connection. The sensitivity, duty cycle distortion and jitter meet or exceed all Fibre Channel and Gigabit Ethernet application requirements. The VSC7709 is available in flat-windowed or lensed packages. The transimpedance amplifier is also available in bare die form.

FEATUREs
• High Bandwidth: 1100MHz
• Low Input Noise Equivalent Power: 0.5mW
• Single 3.3V Supply
• 1.25Gb/s Data Rate
• 75mm Optically Active Area (PIN diode)
• Integrated AGC
• Package: TO-46, TO-56, Bare Die

APPLICATIONs
• Gigabit Ethernet Optical Receivers
• Fibre Channel Optical Receivers
• ATM Optical Receivers
• System Interconnect
• SONET/SDH