LTC6563IUDDM#PBF

Overview

The LTC6563IUDDM#PBF is a low-noise four-channel transimpedance amplifier with integrated output multiplexing. It features a 600MHz bandwidth and selectable transimpedance gains of 22.2kΩ, 16.7kΩ, 11.1kΩ, or 5.55kΩ. The device provides a linear input current range up to 90µA and supports fast channel switching and overload recovery. It includes a built-in high-speed differential ADC driver capable of swinging up to 2VP-P into a 100Ω load. Power consumption ranges from 194mW to 325mW on a 3.3V supply.

Feature Summary

• Integrates a 4-to-1 multiplexer to simplify system design and enable channel expansion
• Features selectable transimpedance gain settings for flexible signal conditioning
• Includes a built-in high-speed differential ADC driver with large voltage swing capability
• Provides fast overload recovery and rapid channel switchover times

Applications

• Automotive LIDAR receivers
• Industrial LIDAR receivers
• Systems utilizing Avalanche photodiodes (APDs)
• Photodiode (PD) detection circuits

Procurement Notes

Verify the specific temperature grade suffix when ordering. The 'I' suffix denotes an industrial operating range of -40°C to 85°C. Confirm that the package type matches the required footprint, as this component utilizes a 24-lead QFN with wettable flanks. Ensure compatibility with the intended power supply voltages before procurement.

Selection Notes

Select this component for applications requiring high bandwidth and low noise in a multi-channel configuration. The internal multiplexer reduces external component count compared to discrete solutions. Consider the available gain settings against the expected photocurrent levels to ensure optimal linearity and noise performance for the specific detector type being used.

Part Context

This part belongs to the LTC6563 family of transimpedance amplifiers designed for optical sensing. It is distinct from other Analog Devices amplifiers by its specific integration of output multiplexing and high-speed differential driving capabilities within a compact QFN package. The device is optimized for high-frequency signal processing in demanding environments.

Replacement Considerations

The LTC6563HUDDM#PBF serves as a higher temperature grade alternative, supporting operation up to 125°C. Both parts share identical pinouts and electrical characteristics within their respective temperature ranges. Verify thermal requirements to determine if the industrial grade is sufficient or if the extended grade is necessary.

FAQ

What is the maximum differential output voltage swing?

The built-in high-speed differential ADC driver can swing up to 2VP-P while driving into a 100Ω external differential load.

How does the device handle channel selection?

An internal 4-to-1 multiplexer allows selection between the four channels. External multiplexing capability also exists to expand the solution to multiple devices.

What are the selectable transimpedance gain values?

The transimpedance gain can be selected among 22.2kΩ, 16.7kΩ, 11.1kΩ, and 5.55kΩ using the ADJ pins.