AD8561ANZ

Overview

The AD8561ANZ is a single ultrafast comparator from Analog Devices Inc. housed in an 8-lead plastic DIP package. It features a typical propagation delay of 7 ns at 5 V supply, with a maximum of 9.8 ns across 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 (max 7 mV), input bias current of –3 μA, and complementary digital outputs capable of sourcing or sinking up to 3.2 mA.

Feature Summary

• Features closely matched rising and falling signal propagation delays that track over temperature, maintaining output duty cycle matching for clock recovery applications.
• Includes a dedicated latch function with defined setup and hold times to retain output data states independent of subsequent input changes.
• Offers a wide common-mode input voltage range extending down to the negative supply rail, compatible with PNP differential input stages.

Applications

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

Procurement Notes

Verify the specific ordering suffix to confirm the package type and RoHS compliance status. The 'ANZ' designation indicates an 8-lead Plastic Dual In-Line Package that is lead-free and RoHS compliant. Ensure the procurement source provides documentation confirming the component meets the specified industrial temperature range and electrical characteristics outlined in the official datasheet.

Selection Notes

Select this component when a fast response time with low power consumption is required compared to legacy comparators. The AD8561 serves as a direct pin-compatible upgrade for LT1016 designs, offering lower supply current and wider input common-mode range. Consider the complementary output structure and latch capability if data retention or logic interfacing is necessary within the system architecture.

Part Context

The AD8561 belongs to the family of ultrafast single-supply comparators manufactured by Analog Devices. It is designed to replace older bipolar comparators like the LT1016 while providing improved performance metrics such as reduced propagation delay and lower quiescent current. The device is available in multiple surface-mount and through-hole packages to accommodate various PCB layout requirements.

Replacement Considerations

The AD8561 is a pin-compatible replacement for the LT1016. Designers must account for differences in input voltage range, bias current direction, and output swing when migrating existing circuits to ensure proper operation without modification.

FAQ

How does the AD8561 compare to the LT1016 regarding input voltage range?

When operated on a +5 V single supply, the AD8561 has a wider input voltage range from 0 V to 3.0 V, whereas the LT1016 operates from +1.25 V to +3.5 V.

What is the purpose of the LATCH pin on the AD8561?

The LATCH pin allows the user to retain the current output state regardless of further changes to the input voltages, functioning as a data storage feature for the comparator output.