MAX3797

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

Only 105mW Power Consumption While Supporting Fast RSSI

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Overview

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

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 1.25µA_RMS, which reflects a theoretical sensitivity of -14.8dBm OMA at a bit error rate (BER) of 10^-12 for a PIN (þ = 0.55, r_e = 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.

Applications