1.25Gbps Photodiode Amplifier Hybrids

Silicon Photodetector / Transimpedance Amplifier

FCI-H125G-10: 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 in/out. 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 connectorixation 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.

Silicon 1.25Gbps Photodiode Amplifier Hybrids

Product Applications

  • High Speed Optical Communications
  • Gigabit Ethernet
  • Fibre Channel

Product Features

  • Silicon Photodetectors / Low Noise Transimpedance Amplifier
  • Low Cost
  • Large Active Area of 250µm High Bandwidth / Wide Dynamic Range
  • Automatic Gain Control (AGC)
  • Hermetically Sealed TO-46 Can
  • Single +3.3V to +5V Power Supply
  • Differential Output

Electro-Optical Characteristics

Model Number Active Area Diameter Supply Voltage Supply Current Operating Wavelength Responsivity Transimpedence Sensitivity Bandwidth Differential Output Output Impedence Package Click Image to Zoom
FCI-H125G-010 250 µm +3 to +5.5 V 38 mA 850 nm 3000 V/W
-19dBm; Differential
8300 Ω
-19dBm; Differential
-23 dBm
BER 10-10; PRBS27-1
1000 MHz
-3dBm; Small Signal
200 mVp-p 50 Ω TO-18 No image found for (FCI-H125G-010)
FCI-H125G-010L 250 µm +3 to +5.5 V 38 mA 850 nm 3000 V/W -19dBm; Differential 8300 Ω -19dBm; Differential -23 dBm BER 10-10; PRBS27-1 1000 MHz -3dBm; Small Signal 200 mVp-p 50 Ω TO-18 No image found for (FCI-H125G-010L)

Electro-Optical Characteristics

Model Number Optical Overload (min) Storage Temp Operating Temp SupplyVoltage2 Input Optical Power Package Click Image to Zoom
FCI-H125G-010 -3 dBm -55 to 125 °C -40 to +75 °C --- to +6 V --- to +5 dBm TO-18 No image found for (FCI-H125G-010)
FCI-H125G-010L -3 dBm -55 to 125 °C -40 to +75 °C --- to +6 V --- to +5 dBm TO-18 No image found for (FCI-H125G-010L)