AD8611ARMZ-R2

Overview

The AD8611ARMZ-R2 is a single-channel ultrafast analog comparator manufactured by Analog Devices Inc. It operates on a single supply voltage ranging from 3 V to 5 V and features a propagation delay of 4 ns at 5 V, with a maximum specified delay of 5.5 ns. The device includes a latch function that is active only when the supply voltage exceeds 4.3 V. It utilizes an 8-lead MSOP surface-mount package and provides complementary digital outputs capable of sourcing or sinking up to 10 mA. The input common-mode range extends down to the negative supply rail.

Feature Summary

• Ultrafast 4 ns propagation delay suitable for high-speed timing circuits
• Integrated latch function for maintaining constant output states
• Complementary digital outputs for flexible logic interfacing
• Single-supply operation with input range including the negative rail

Applications

• High speed timing circuits
• Clock recovery and clock distribution systems
• Line receivers in digital communications
• Phase detectors and zero-crossing detectors
• High speed analog-to-digital converter (ADC) interfaces

Procurement Notes

Verify the specific suffix R2 indicates reel packaging configuration. Confirm the MSOP-8 package type matches the design footprint requirements. Ensure the operating temperature range of -40°C to +85°C aligns with the system environment. Check RoHS compliance status for regulatory adherence. Validate pinout compatibility if replacing legacy components like LT1016 or LT1394.

Selection Notes

Select this component for applications requiring fast response times within a single-supply constraint. The integrated latch feature distinguishes it from standard comparators lacking data retention capabilities. Consider the 10 mA output drive capability for direct logic interface without additional buffering. Evaluate the 4.3 V latch threshold against the available supply voltage to ensure functionality. The MSOP package offers a compact solution for space-constrained designs.

Part Context

The AD8611 is part of the AD8611/AD8612 family of ultrafast comparators. The AD8611 represents the single-channel version, while the AD8612 provides dual channels in a TSSOP package. This series is designed as a drop-in upgrade for older LT1016 and LT1394 designs, offering improved propagation delay and lower power consumption while maintaining pin compatibility.

Replacement Considerations

The AD8611 is pin-for-pin compatible with the LT1016 and LT1394. When substituting these parts, account for differences in input bias current direction and common-mode voltage range. Verify that the system can tolerate the lower supply current and different output voltage swing characteristics.