AD8611AR-REEL

Overview

The AD8611AR-REEL is a single-channel ultrafast comparator from Analog Devices, featuring a typical propagation delay of 4 ns at 5 V and a maximum of 5.5 ns. It operates on a single supply voltage ranging from 3 V to 5 V. The device includes a latch function that retains output state when the LATCH pin is high, provided VCC exceeds 4.3 V. It offers complementary outputs (QA and Q̅A) capable of sourcing or sinking up to 10 mA. The input common-mode range extends down to the negative supply rail. Packaged in an 8-lead narrow body SOIC with reel packaging, it supports input frequencies up to 100 MHz.

Feature Summary

• Features a fast 4 ns propagation delay for high-speed timing applications.
• Includes a latch function to maintain constant output states independent of input changes.
• Provides complementary digital outputs for flexible logic interfacing.
• Supports single-supply operation with a wide common-mode input range including the negative rail.

Applications

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

Procurement Notes

Verify the specific ordering suffix REEL7 against the manufacturer's current documentation to confirm tape-and-reel packaging specifications. Ensure the component matches the 8-lead SOIC package outline dimensions. Confirm RoHS compliance status as per the latest datasheet revision. Validate that the source resistance remains below 1 kΩ to achieve specified performance metrics.

Selection Notes

Select this component for designs requiring sub-5 ns response times and latch functionality. It serves as a direct pin-compatible upgrade for LT1016 and LT1394 designs, offering lower power consumption and wider input range. Consider the 3 pF input capacitance and source impedance requirements for optimal high-frequency performance. Ensure the application voltage stays within the 3 V to 5 V single-supply limit.

Part Context

The AD8611 is part of the AD8611/AD8612 family of ultrafast single-supply comparators manufactured by Analog Devices. While the AD8612 provides dual channels in a 14-lead TSSOP package, the AD8611 offers a single channel in compact surface-mount packages. This series is designed to replace older generation comparators like the LT1016 and LT1394 with improved speed and efficiency.

Replacement Considerations

The AD8611ARZ is a verified direct replacement for the AD8611AR, differing primarily in lead-free manufacturing compliance. Both share identical electrical characteristics and pinouts. Verify that any substitute maintains the 4 ns propagation delay and latch functionality if these features are critical to the circuit design.