GN1057CW-CHIP

Overview

The GN1057 is a fully integrated silicon germanium (SiGe) BiCMOS transimpedance amplifier designed for wideband, low-noise pre-amplification of current signals from PIN photodiodes or APDs. It features differential outputs and incorporates automatic gain control (AGC) to enhance linear dynamic range. The device operates on a single +3.3V power supply with typical power dissipation of 190mW. It maintains constant bandwidth over its dynamic range and provides a typical small signal gain of 4 kΩ. The GN1057 supports NRZ data rates from 9.95 Gb/s to 11.3 Gb/s and includes an RSSI function.

Feature Summary

• Incorporates automatic gain control (AGC) to improve linear dynamic range
• Provides wideband, low noise pre-amplification for PIN photodiode or APD signals
• Features differential outputs with constant bandwidth over the dynamic range
• Requires only a supply decoupling capacitor as an external component

Applications

• ITU/IEEE-based transmission systems
• OC-192 fibre optic modules and line termination
• 10 Gigabit Ethernet
• Fibre Channel
• Serial data systems up to 11.3 Gb/s

Procurement Notes

Verify the specific ordering code GN1057CW-CHIP against official Semtech documentation to confirm package type and availability. Ensure compatibility with system voltage requirements and interface standards before procurement. Cross-reference technical specifications with the latest datasheet revisions to guarantee performance alignment with design constraints.

Selection Notes

Select the GN1057 for applications requiring high-speed optical reception with automatic gain control capabilities. Its SiGe BiCMOS technology ensures low noise performance suitable for demanding serial data environments. Consider the single supply voltage requirement and typical power dissipation when designing power management circuits for the target application.

Part Context

The GN1057 belongs to the Gennum product line, now part of Semtech Corporation's portfolio. It is designed for high-speed optical communication systems operating at data rates up to 11.3 Gb/s. The device integrates essential functions into a compact form factor, reducing the need for external components and simplifying circuit design for optical transceivers and modules.

Replacement Considerations

Consult official Semtech documentation for verified substitute part numbers. Ensure any replacement matches the original pinout, electrical characteristics, and package dimensions to maintain system compatibility without redesign.

FAQ

What type of photodetectors does the GN1057 support?

The GN1057 is designed to provide pre-amplification for current signals from both PIN photodiodes and Avalanche Photodiodes (APDs).

Does the GN1057 require many external components?

No, a decoupling capacitor on the supply is the only external component required for operation.