2.5 Gb/s TransImpedance Amplifier



Package Function Data Rate(Gb/s) Diff gain(dBΩ) Input overload (mApp)

On Chip AGC

Out Current(mA)  Power Supply(V)  Status Process
DIE Differential Output TIA 2.5 76 2.5 Yes Diff 45  +3.3  Available ED02AH



The CGY2102UH is a high performance 2.5 Gb/s TransImpedance Amplifier (TIA). Typical use is as a low noise preamplifier for lightwave receiver modules in optical fiber networks. The TIA gives an exceptionally good sensitivity and high gain. The device is intended to be used with a PIN or APD photodetector. There is a built in AGC function which limits the peak-to-peak output voltage and protects the device from optical input overload.

The CGY2102UH/C2 can be assembled in a small form factor packages, such as TO-46 headers. The die is manufactured using OMMIC’s 0.18 μm gate length PHEMT Technology. The MMIC uses gold bonding pads and backside metallization and is fully protected with Silicon Nitride passivation to obtain the highest level of reliability. This technology has been evaluated for Space applications and is on the European Preferred Parts List of the European Space Agency.




  • Digital optical STM-16 or OC-48 transmission systems
  • PIN or APD preamplifier receivers
  • GPON Optical Network Unit (ONU)







  • Suitable for 2.5 Gb/s optical fiber links
  • Single +3.3 V to +5.0 V supply voltage
  • 70 dBW differential transimpedance gain
  • Sensitivity : -27.5 dBm @ BER of 10-10
  • Built in AGC function
  • Differential output
  • 2.5 mA peak-to-peak input overload current
  • 45 mA consumption current at +3.3 V
  • Tested, Inspected Known Good Die (KGD)
  • Samples Available
  • Demonstration Boards Available
  • Space and MIL-STD Available


Block Diagram of the CGY2102UH/C2


Application Note