AD8611ARZ

Overview

The AD8611ARZ is a single-channel ultrafast comparator from Analog Devices, housed in an 8-lead narrow body SOIC package. It operates on a single supply voltage ranging from 3 V to 5 V and features a typical propagation delay of 4 ns at 5 V, with a maximum of 5.5 ns. The device includes a latch function that requires a supply voltage above 4.3 V to operate. It provides complementary outputs capable of sourcing or sinking up to 10 mA. Key electrical specifications include a maximum input offset voltage of 7 mV, an input bias current of 6 µA, and a common-mode rejection ratio of 85 dB. The component supports input frequencies up to 100 MHz and functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Features a 4 ns propagation delay with closely matched rising and falling signal delays for accurate clock recovery applications.
• Includes a latch function to maintain constant output states, provided the supply voltage exceeds 4.3 V.
• Offers complementary digital outputs compatible with TTL logic levels.
• Provides a wide common-mode input range extending down to the negative supply rail.

Applications

• High speed timing circuits
• Clock recovery and distribution systems
• Line receivers
• Digital communications phase detectors
• High speed analog-to-digital converter (ADC) interfaces

Procurement Notes

Verify the specific ordering suffix 'ARZ' corresponds to the 8-lead narrow body SOIC package variant. Confirm the revision status matches the required datasheet version, as Analog Devices may update specifications without notice. Ensure the procurement channel sources genuine components to avoid counterfeit risks associated with high-speed analog devices. Check for RoHS compliance documentation if environmental regulations apply to the final assembly.

Selection Notes

Select this component when upgrading designs previously using LT1016 or LT1394 comparators due to its pin-for-pin compatibility and improved propagation delay. Consider the AD8611ARZ for applications requiring a wider common-mode input range compared to legacy parts. Evaluate the power consumption requirements, as the device draws approximately 10 mA at 5 V. Ensure the system design accommodates the latch functionality constraints, specifically the minimum 4.3 V supply requirement for latch activation.

Part Context

The AD8611 is part of the AD8611/AD8612 family of ultrafast comparators manufactured by Analog Devices. While the AD8611 provides a single channel, the dual-channel counterpart is the AD8612. This series is designed to replace older generation comparators like the LT1016 and LT1394, offering faster switching speeds and lower power consumption. The ARZ suffix denotes the specific surface-mount SOIC packaging configuration available for this single-channel variant.

Replacement Considerations

The AD8611 is explicitly documented as a direct pin-compatible upgrade for LT1016 and LT1394 designs. When substituting these legacy parts, verify that the input common-mode voltage range and output swing characteristics meet the new circuit requirements. Note that the AD8611 has different input bias current directions compared to the LT1016.