AD8561ARU-REEL

Overview

The AD8561ARU-REEL is a single ultrafast comparator in an 8-lead TSSOP package. It features a typical propagation delay of 7 ns at 5 V supply, with a maximum of 9.8 ns over the industrial temperature range of –40°C to +85°C. The device supports single supply operation from 3 V to 10 V or dual supplies of ±5 V. Key electrical parameters include a typical input offset voltage of 2.3 mV, a common-mode rejection ratio of 85 dB, and a power supply rejection ratio of 65 dB. It offers complementary digital outputs and includes a latch function for data retention.

Feature Summary

• Features a 7 ns propagation delay with closely matched rising and falling signal delays for accurate clock recovery.
• Supports single supply (3 V to 10 V) or dual supply (±5 V) operation with low power consumption.
• Includes a dedicated latch input pin to retain output data states independently of input signals.
• Provides complementary digital outputs capable of driving standard logic loads.

Applications

• High speed timing circuits
• Clock recovery and distribution systems
• Line receivers and digital communications
• Phase detectors and high speed sampling

Procurement Notes

Verify that the ordering suffix -REEL corresponds to the tape and reel packaging format required for automated assembly processes. Confirm the specific part number variant matches the required RoHS compliance status indicated by the Z suffix if applicable. Ensure the component meets the specified industrial temperature range requirements for the target application environment before finalizing procurement orders.

Selection Notes

Select this component when a fast response time with matched rise and fall delays is critical for maintaining signal duty cycle accuracy. Consider the wide common-mode input range extending to the negative rail for flexible interface designs. Evaluate the latch functionality if data storage at the output stage is necessary without external memory components. Verify compatibility with existing LT1016 footprints if upgrading legacy designs.

Part Context

The AD8561 series serves as a high-performance replacement for older comparator models like the LT1016, offering improved speed and lower power consumption. It is designed for applications requiring precise timing and fast signal processing within industrial temperature constraints. The TSSOP package provides a compact surface-mount solution suitable for space-constrained printed circuit board layouts.

Replacement Considerations

The AD8561 is pin-compatible with the LT1016. When substituting, account for differences in input voltage range, bias current direction, and output swing characteristics to ensure proper circuit operation without modification.

FAQ

How does the AD8561 handle input signals exceeding the common-mode range?

Signals exceeding the common-mode range may result in slower response times. For optimal performance, keep input voltages within the specified range relative to the supply rails.

What is the purpose of the latch input on Pin 5?

The latch input allows the user to retain the current output state regardless of subsequent changes in the input voltages, facilitating data storage directly at the comparator output.