LTC6561HUF#WPBF

Overview

The LTC6561HUF#WPBF is an automotive-grade, four-channel multiplexed transimpedance amplifier with output multiplexing. It features a 220 MHz bandwidth and 74 kΩ transimpedance gain. The device operates on a single 5V supply, consuming 200 mW. Input current noise density is 4.8 pA/√Hz at 200 MHz with 2 pF input capacitance. It supports linear input ranges up to 30 µA and fast overload recovery of 12 ns. Packaged in a 4 mm × 4 mm 24-lead QFN.

Feature Summary

• Four-channel architecture with integrated 4-to-1 input multiplexer
• Output multiplexing capability for expanding channel counts
• Fast overload recovery and rapid channel switchover
• Automotive qualified reliability

Applications

• LIDAR receivers using Avalanche Photodiodes (APDs)
• Industrial imaging systems
• Multiplexed APD array interfaces

Procurement Notes

Verify the #WPBF suffix indicates automotive qualification requirements. Confirm the operating temperature range matches system specifications. Ensure the package type aligns with PCB layout capabilities. Check for specific automotive reliability reports from the manufacturer.

Selection Notes

Select this component for applications requiring low-noise amplification of small currents from photodiodes. Consider the 220 MHz bandwidth and 74 kΩ gain for signal integrity. Evaluate the multiplexing features for reducing external component count in multi-channel designs.

Part Context

This part belongs to the LTC6561 series of transimpedance amplifiers. It is designed specifically for high-speed optical detection. The automotive grade variant ensures compliance with strict quality standards for vehicle electronics.

Replacement Considerations

Consult Analog Devices for verified automotive-grade substitutes within the same family. Verify pin compatibility and electrical parameters before substitution.

FAQ

How does the Output MUX function?

The O_MUX pin allows multiple LTC6561 devices to be combined. Driving it high isolates the outputs, while driving it low enables the output for master/slave configurations.

What is the maximum overload recovery time?

The device recovers from 1 mA saturation events in less than 12 ns without phase reversal.