Technical Insight
Hamamatsu builds TIAs into receivers (New Devices)
Bridgewater, NJ. Hamamatsu has introduced two InGaAs PIN photodiodes with built-in transimpedance amplifiers suited to optical fiber systems, including Fibre Channel, Gigabit Ethernet and SDH. The G8338 and G8339 are receivers that exhibit peak sensitivities at 1.3 and 1.5 m and feature a dynamic range of 37 dBm to 5 dBm at data rates up to 155 Mbit/s. The photosensitivity is 27 V/mW. Both devices operate at a supply current of 25 mA and an output bias voltage of 1.5 V, and are designed to be stable in the 20 to +70C temperature range. The G8338 is available in a TO-18 package and features an active area of 0.08 mm. A flat window is a standard fixture for the G8338, which can also be modified to accept a lens for efficient and easy coupling to an optical fiber. The G8339 series is available in five different packages based on board mounting of SC, LC or FC connectors. usa.hamamatsu.com
