LTC6561IUF#TRPBF

Overview

The LTC6561IUF#TRPBF is a low-noise four-channel transimpedance amplifier with integrated multiplexing. It features a 220MHz bandwidth and 74kΩ transimpedance gain. The device operates on a single 5V supply, consuming 200mW. Input current noise density is 4.8pA/√Hz at 200MHz with 2pF capacitance. Linear input range extends to 30µA. Overload recovery is under 12ns. Output swings 2VP-P into 100Ω. It uses a 24-lead QFN package.

Feature Summary

• Four-channel architecture with integrated 4-to-1 input multiplexer
• Fast overload recovery and channel switchover capabilities
• Output multiplexing allows expansion to multi-channel arrays
• Low noise performance optimized for avalanche photodiode inputs

Applications

• LIDAR receivers using Avalanche Photodiodes (APDs)
• Industrial imaging systems
• Time-of-flight detectors
• Multiplexed APD array interfaces

Procurement Notes

Verify the suffix #TRPBF indicates tape and reel packaging. Confirm the 'I' grade specifies an operating temperature range of -40°C to 85°C. Ensure the component matches the 24-lead QFN physical form factor. Cross-reference the manufacturer part number with official Analog Devices documentation to validate authenticity and revision status before procurement.

Selection Notes

Select this component when designing systems requiring multiple TIA channels in a compact footprint. The integrated multiplexer reduces external component count compared to discrete solutions. Consider the 220MHz bandwidth limit and 74kΩ gain for signal amplitude requirements. Evaluate total input capacitance impact on noise and bandwidth during system design.

Part Context

This part belongs to the LTC6561 series of multiplexed transimpedance amplifiers. It is designed specifically for high-speed optical detection applications. The device integrates four independent TIAs with a shared output stage controlled by digital select lines. It serves as a key interface between photodetectors and downstream processing electronics.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.