10.3Gbps, Low-Power Transimpedance Amplifier for 10GBASE-SR Applications

Only 105mW Power Consumption While Supporting Fast RSSI

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The MAX3797 is a low-power transimpedance amplifier designed for optical transmission systems at data rates up to 10.3125Gbps and for use with PIN diodes.

The MAX3797 incorporates an automatic gain control (AGC) architecture providing nominal small-signal transimpedance of 5.5kΩ. The input-referred noise is typically 1.25µARMS, which reflects a theoretical sensitivity of -14.8dBm OMA at a bit error rate (BER) of 10-12 for a PIN (þ = 0.55, re = 3) photo detector.

The small die size of 1mm x 0.76mm enables an optical subassembly using a TO-46 or TO-56 package. The MAX3797 supports low-cost ROSAs by offering stable operation with no capacitors required in the ROSA. The MAX3797's sensitivity is stable over temperature and supply.
MAX3797: Typical Application Circuit MAX3797: Typical Application Circuit Enlarge+

Key Features

  • Stable Sensitivity Over Supply and Temperature
  • Up to 10.3125Gbps (NRZ) Operation
  • Supports No-Capacitor ROSA
  • AGC Gain of 5.5kΩ
  • Single 3.3V Power Supply
  • 105mW Power Consumption
  • Wide Bandwidth Current Monitor Enables RSSI-Based LOS Implementation
  • Die Size 1mm x 0.76mm


  • 10.3125Gbps Ethernet Optical Receivers (10GBASE-SR)
  • 8.25Gbps Fibre Channel Optical Receivers (8xFC)
Product Reliability Reports: MAX3797.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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