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You are here:   » Products » Optical Technologies » Components » Detectors » Silicon Photodetectors (190-1000nm) » Photodiodes with preamplifier » Silicon Photodetector with Transimpedance Amplifier

Photodiodes with preamplifier

Silicon Photodetector with Transimpedance Amplifier

Key Features

  • Silicon photodetector / Low noise
  • Transimpedance amplifier
  • Large active area of 250μm
  • High bandwidth / wide dynamic range
  • Automatic gain control (AGC)
  • Hermetically sealed TO-46 Ccan
  • Single +3.3V to +5V power supply
  • Differential output


FCI-H125G-010 is a low noise, high bandwidth photodetector plus transimpedance amplifier designed for short wavelength (850nm) high speed fiber optic data communications. The hybrid incorporates a 250μm diameter large sensing area, high sensitivity silicon photodetector. It also includes a high gain transimpedance amplifier producing a differential output voltage for latching to post amplifiers used in electro-optical receivers and transceivers for Gigabit Ethernet and Fibre Channel applications up to 1.25Gbps over multi-mode fiber.

The photodetector converts the light into an electrical signal while the output voltage increases with light input. This is achieved by a single +3.3V to +5V positive power supply. These devices are available in 4 pin TO-46 metal packages with either a double sided AR coated window cap or an integrated lens cap. The 250μm diameter sensing area eases fiber alignment for connectorization or receptacle attachment. Furthermore, the proximity of the transimpedance amplifier to the photodetector lowers the capacitance associated with long traces, therefore allowing higher bandwidth and sensitivity.


Data communication