Quad-Channel 28Gbps Limiting TIA
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Min Temp (°C) -5
Max Temp (°C) 95
Package Bare Die
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The MxL9109 is a high sensitivity, four-channel 28Gbps Transimpedance Amplifier (TIA) array that is designed for use in Rx modules for 100Gbps Ethernet optical transmission systems. Each amplifier has 4.5kΩ of small signal differential transimpedance gain.
The quad TIA consumes a total of 0.40W using a 3.3V power supply. In addition to the low noise performance, the IC has high overload of 4mApp. Each TIA incorporates an internal DC feedback loop that automatically balances the output DC levels.

  • Supports data rates up to 28Gbps
  • 4.5kΩ transimpedance gain
  • Input-referred noise density of 10pA/√Hz
  • 4mApp overload current
  • 360mVpp differential output amplitude
  • Single power supply of 3.3V
  • 0.40W total power dissipation
  • Channel to channel isolation > 45dB
  • Die size of 3.167mm x 1.672mm

  • 100Gbps ER4 and ER4 Lite
  • CFP transceivers
  • CFP2 transceivers
  • CFP4 transceivers
  • QSFP28 transceivers

Documentation & Design Tools

Type Title Version Date File Size
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Parts & Purchasing

Part Number Min Temp Max Temp Status
MXL9109-A7-W -5 95 Active

Part Status Legend
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.