MAX3266CSA

Overview

The MAX3266CSA is a transimpedance preamplifier designed for 1.25Gbps local area network fiber optic receivers. It features 200nA input-referred noise, 920MHz bandwidth, and 1mA input overload. The device operates from a +3.0V to +5.5V single supply without requiring a compensation capacitor. It includes a space-saving filter connection providing positive bias for the photodiode through a 1.5kΩ resistor to VCC.

Feature Summary

• Optimized for low-noise signal amplification in high-speed optical receiver applications
• Integrated photodiode biasing via internal resistor eliminates external components
• Capacitor-free design simplifies circuit layout and assembly

Applications

• Gigabit Ethernet systems
• 1Gbps to 2.5Gbps optical receivers
• Fibre Channel interfaces

Procurement Notes

Verify the specific suffix 'CSA' against official Analog Devices documentation to confirm package type and temperature range. Ensure compatibility with existing board layouts due to the fixed internal 1.5kΩ photodiode bias resistor. Confirm that the single-supply voltage requirements align with system power rails before finalizing procurement.

Selection Notes

Select this component when designing 1.25Gbps optical links requiring minimal external passive components. The integrated bias resistor suits TO-46 or TO-56 header assemblies. Consider the MAX3267 if higher data rates up to 2.5Gbps are required, noting its pin-compatible but distinct noise and bandwidth specifications.

Part Context

The MAX3266 belongs to Maxim Integrated's family of transimpedance amplifiers tailored for LAN fiber optic applications. It serves as a critical front-end stage for converting photocurrent into usable voltage signals. The device complements the MAX3267, offering a cost-effective solution for 1.25Gbps standards while maintaining high bandwidth and low noise performance.

Replacement Considerations

The MAX3267 is a pin-for-pin compatible alternative for communications up to 2.5Gbps. Verify that the increased bandwidth and different noise characteristics meet the specific link budget requirements.