MAX3864E/D-B3A

Overview

The MAX3864E/D-B3A is a transimpedance preamplifier designed for SDH/SONET systems operating up to 2.5Gbps. It features 490nA input-referred noise, 2.0GHz bandwidth, and 2mA input overload. The device operates from a single +3.0V to +5.5V supply, dissipating 112mW at +3.3V. It includes an integrated filter resistor and low-frequency compensation capacitor. The part provides CML outputs with 100Ω differential output impedance.

Feature Summary

• Integrated low-frequency compensation capacitor and filter connection simplifying design
• CML outputs with 100Ω differential output impedance
• DC cancellation circuit minimizes pulse-width distortion
• Wide dynamic range using PIN photodetector

Applications

• SDH/SONET transmission systems
• PIN preamplifier receivers
• APD preamplifier receivers
• 2.5Gbps ATM receivers
• Regenerators for SDH/SONET

Procurement Notes

Verify the specific suffix B3A against official manufacturer documentation to confirm package type and availability status. Ensure compatibility with existing TO-46 header or SO package designs as specified in the datasheet ordering information.

Selection Notes

Select this component for high-speed fiber optic applications requiring low noise and wide dynamic range. Consider source capacitance effects on noise and bandwidth when designing the input stage. Ensure proper termination with a 100Ω differential load for optimal performance.

Part Context

The MAX3864 belongs to Maxim Integrated's line of high-performance transimpedance amplifiers. It is specifically engineered for optical communication systems operating at data rates up to 2.5Gbps. The device integrates essential functions to reduce external component count.

Replacement Considerations

No official substitute part numbers are confirmed in the provided documentation. Consult Analog Devices or Maxim Integrated for current replacement options if this specific variant is unavailable.

FAQ

How does the DC cancellation circuit affect noise performance?

The DC cancellation circuit draws current from the input, which increases amplifier noise for signals with a significant DC component. For low-level signals with little or no DC component, this effect is minimal.

What is the recommended termination for the outputs?

For optimum supply-noise rejection, the MAX3864 should be terminated with a differential load. If a single-ended output is required, the unused output should be terminated with 50Ω to VCC.