MAX3657ETC+

Overview

The MAX3657ETC+ is a low-noise transimpedance amplifier designed for optical receivers operating up to 155Mbps. It features a typical small-signal transimpedance gain of 54kΩ and a bandwidth of 130MHz. The device operates from a single +3.3V supply, consuming approximately 76mW of power. Key electrical characteristics include an input-referred noise current of 14nARMS and a DC input overload capability of 2mA P-P. It includes an integrated filter resistor and an average photocurrent monitor.

Feature Summary

• Integrated DC-cancellation circuit that minimizes pulse-width distortion without requiring external compensation capacitors.
• Built-in photocurrent monitor providing a current output proportional to the average input signal.
• On-chip filter resistor provides positive bias for the photodiode while reducing supply noise effects.

Applications

• Optical receivers operating at data rates up to 155Mbps
• Class-B and Class-C passive optical networks (PONs)
• SFP/SFF optical transceivers

Procurement Notes

Verify the specific suffix 'ETC+' corresponds to the 12-pin Thin QFN package with an operating temperature range of -40°C to +85°C. Confirm the component is sourced directly from Analog Devices or Maxim Integrated authorized channels to ensure authenticity. Check for any recent lifecycle status updates regarding availability.

Selection Notes

Select this component when designing fiber-optic interfaces requiring high gain and low jitter at 155Mbps speeds. Ensure the application utilizes a single +3.3V supply and requires differential CML outputs. Verify that the system can accommodate the specified 54kΩ transimpedance gain and 130MHz bandwidth requirements.

Part Context

This part belongs to the MAX3657 family of transimpedance amplifiers manufactured by Analog Devices Inc./Maxim Integrated. The ETC variant specifically denotes the surface-mount Thin QFN package configuration. Other variants in the series include die options (MAX3657E/D) and reverse polarity versions (MAX3657BE/D).

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult manufacturer resources for potential cross-reference alternatives if this specific package or revision is unavailable.

FAQ

How does the MAX3657 handle DC components in the input signal?

It utilizes an internally compensated DC-cancellation circuit that removes the DC component of the input signal to center it within the linear range, thereby reducing pulse-width distortion.

What is the function of the FILT pin?

The FILT pin connects to an internal 800Ω filter resistor and allows for the connection of an external capacitor to form a filter that biases the photodiode cathode and reduces supply noise.