AD96687BP

Overview

The AD96687BP is a dual ultrafast voltage comparator from Analog Devices, housed in a 20-lead PLCC package. It operates on +5 V and -5.2 V supplies with an industrial temperature range of -25°C to +85°C. Key electrical parameters include a typical propagation delay of 2.5 ns (max 3.5 ns), 50 ps delay dispersion, and 90 dB CMRR. The device features complementary open-emitter outputs compatible with ECL logic.

Feature Summary

• Ultrafast differential input stage ensures consistent propagation delay across wide common-mode ranges.
• Integrated level-sensitive latch inputs enable tracking, track-hold, or sample-hold operational modes.
• Low propagation delay dispersion maintains timing accuracy under varying input overdrive conditions.
• Complementary digital outputs provide sufficient drive current for direct transmission line termination.

Applications

• High speed triggers
• Threshold detectors
• Window comparators
• Peak detectors

Procurement Notes

Verify the specific ordering suffix BP against the manufacturer's official documentation to confirm the 20-lead PLCC package configuration. Ensure that supply voltages remain stable within ±5% for normal operation. Confirm that the application environment adheres to the specified industrial temperature range limits.

Selection Notes

Select this component when high-speed signal comparison requires minimal propagation delay variation. The dual-channel architecture supports independent processing within a single package. Verify compatibility with ECL 10K/10KH logic families and ensure proper power supply decoupling techniques are employed for optimal performance.

Part Context

The AD96687BP belongs to the AD96685/AD96687 family of ultrafast comparators. While the AD96685 provides a single channel, the AD96687 offers dual channels with identical speed characteristics. This family is designed for applications demanding precise timing and high-speed signal integrity in industrial environments.

Replacement Considerations

The AD96687BRZ serves as a pin-compatible alternative in a 16-pin SOIC package. The AD96687BQ is available in a 16-pin DIP package. All variants share identical electrical specifications and functional block diagrams.

FAQ

How does the AD96687BP handle unused comparator stages?

Unused inputs should not float; they must be held at least one diode drop apart, and the LATCH ENABLE input should be grounded to prevent oscillation.

What is the function of the LATCH ENABLE input?

It controls the operating mode, allowing the output to track inputs in compare mode or reflect the state prior to latching in latch mode.