ADCMP551BRQZ-REEL7

Overview

The ADCMP551BRQZ-REEL7 is a single-supply, high-speed comparator fabricated on Analog Devices' proprietary XFCB process. It features a 500 ps propagation delay and less than 125 ps overdrive dispersion. The device provides differential PECL/LVPECL compatible outputs with sufficient drive current to directly drive 50 Ω terminated transmission lines. It includes a latch input for tracking, track-and-hold, or sample-and-hold modes. The component operates within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Features a 500 ps propagation delay with low overdrive dispersion for precise timing accuracy.
• Provides complementary digital outputs fully compatible with PECL and LVPECL logic families.
• Includes internal latch pull-up resistors allowing transparent mode when inputs are left open.
• Supports flexible operation modes including tracking, track-and-hold, and sample-and-hold via latch control.

Applications

• Automatic test equipment
• High speed instrumentation
• Window comparators
• Threshold detection
• Zero crossing detectors

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and reel specifications. Ensure compatibility with required supply voltages and termination standards before integration. Confirm that the component meets all necessary environmental and regulatory compliance requirements for the intended deployment environment.

Selection Notes

Select this component for applications requiring minimal propagation delay variation across different input overdrive conditions. It is suitable for designs needing direct driving of 50 Ω transmission lines without additional buffering. Consider the available latch functionality if signal acquisition at specific time intervals is required. Verify power supply constraints align with the specified dual supply voltage ranges.

Part Context

This part belongs to the ADCMP551/ADCMP552/ADCMP553 series of single-supply, high-speed comparators. While the ADCMP551 offers a single channel in a 16-lead QSOP package, other variants in the family provide different pin counts and features such as programmable hysteresis. All share the same core XFCB fabrication technology and performance characteristics.

Replacement Considerations

Direct substitutes include the ADCMP552 and ADCMP553 from the same series. Note that the ADCMP552 includes a programmable hysteresis pin and uses a 20-lead package, while the ADCMP553 utilizes an 8-lead MSOP package. Pinout and feature differences must be evaluated during replacement.

FAQ

How does the ADCMP551 handle unused comparator stages?

Unused comparator inputs should not be allowed to float. To prevent oscillation due to high internal gain, ensure the two inputs are separated by at least one diode drop and appropriately connect the LATCH ENABLE inputs.

What is the recommended method for terminating the outputs?

The open-emitter outputs are designed to be terminated through 50 Ω resistors to VCCO − 2.0 V or any other equivalent PECL termination scheme to achieve optimal performance.