ADCMP552BRQ

Overview

The ADCMP552BRQ is a dual-channel, single-supply high-speed comparator fabricated on Analog Devices' proprietary XFCB process. It features a typical propagation delay of 500 ps and overdrive dispersion under 125 ps. The device operates on a single supply voltage ranging from 3.135 V to 5.25 V. It includes differential PECL/LVPECL compatible outputs with sufficient drive current for direct transmission line driving. A key feature is the dedicated programmable hysteresis pin, allowing adjustable noise immunity. The component supports differential latch control for track-and-hold or sample-and-hold operations.

Feature Summary

• Features a dedicated programmable hysteresis pin for adjustable noise immunity independent of output swing.
• Provides differential PECL and LVPECL compatible complementary digital outputs capable of directly driving terminated transmission lines.
• Includes differential latch enable inputs supporting tracking, track-and-hold, and sample-and-hold operational modes.
• Utilizes a differential input stage to maintain consistent propagation delay across varying common-mode voltages.

Applications

• Automatic test equipment
• High speed instrumentation
• Window comparators
• Threshold detection
• Patient diagnostics

Procurement Notes

Verify the specific package suffix against the manufacturer's ordering guide to ensure compatibility with the required footprint. Confirm that the procurement channel provides valid traceability documentation. Check for any environmental compliance certifications required by your region. Ensure the supplier source is authorized to prevent counterfeit components. Validate the revision level matches your design specifications.

Selection Notes

Select this model when dual-channel comparison with precise timing is required alongside adjustable hysteresis. The ADCMP552 is distinct from the ADCMP551 due to its additional hysteresis control pin. Consider the 20-lead QSOP package constraints for PCB layout. Evaluate the power supply requirements against system availability. Compare performance metrics with other series members if single-channel solutions suffice.

Part Context

This component belongs to the ADCMP551/ADCMP552/ADCMP553 family of high-speed comparators. All members share the same core XFCB technology and electrical characteristics regarding speed and input stages. The primary differentiation lies in the number of channels and the presence of specific control pins like the hysteresis interface found exclusively on the ADCMP552 variant.

Replacement Considerations

Public confirmed substitute part numbers: None identified in official documentation.

FAQ

How is hysteresis implemented in the ADCMP552?

Hysteresis is generated through the programmable HYS pin. Connecting a resistor between this pin and the VCCI supply creates a current that establishes symmetrical hysteresis around the trip point, independent of the output logic levels.

What happens if the Latch Enable inputs are left open?

The Latch Enable input pins contain internal pull-up resistors. If left unconnected, these resistors set the latch into transparent tracking mode automatically.