GN1068-CHIP

Overview

The GN1068-CHIP is a bare die transimpedance amplifier (TIA) designed for high-speed optical communication applications. It supports data rates up to 14.5 Gbps, operating at OC-192 / STM-64 speeds with NRZ modulation. The device features a typical transimpedance gain of 6.75 kΩ and a low-frequency cutoff of 20 kHz. It offers selectable bandwidth modes: 12 GHz for 16G mode and 8 GHz for 8G mode. Power dissipation is typically 94 mW. The component includes an RSSI current output ranging from dark current to overload and operates within a junction temperature range of -40°C to +125°C.

Feature Summary

• On-chip decoupling for optimized performance
• Received Signal Strength Indicator (RSSI) current output
• Rate selectable bandwidth configuration
• Supports both TO-can and alternative packaging form factors

Applications

• OC-192 / STM-64 optical modules
• 16G Fibre Channel systems
• 10GBASE-SR / LR / ER Ethernet applications
• CPRI wireless front haul modules

Procurement Notes

Verify the specific ordering suffix and package compatibility before procurement. Confirm that the bare die format aligns with your module assembly capabilities. Ensure thermal management solutions accommodate the specified power dissipation and operating temperature range. Cross-reference the latest datasheet for any updates on RoHS compliance or material declarations.

Selection Notes

Select this component for designs requiring high sensitivity and wideband performance in limiting TIA applications. Consider the rate-selectable bandwidth feature when designing for mixed-rate environments like 8G and 16G Fibre Channel. Evaluate the integration with compatible photodiodes such as PIN or APD types to ensure optimal RF stability and signal integrity.

Part Context

The GN1068 belongs to Semtech's FiberEdge portfolio of high-performance optical interconnect components. It is part of a broader family of TIAs and laser drivers aimed at supporting standards including Ethernet, Fibre Channel, and CPRI. This product line targets data center, telecom, and wireless infrastructure markets requiring low latency and high reliability.

Replacement Considerations

The GN1069 is a related high-performance TIA offering up to 12.5 Gbps operation. Verify interface pinouts and electrical characteristics if substituting between these models.