LMH6553SD/NOPB

Overview

The LMH6553SD/NOPB is a high-speed differential wideband amplifier manufactured by National Semiconductor. It features an integrated output-limiting clamp to protect downstream components from overvoltage conditions. The device operates with a supply voltage range of ±2.7V to ±5.5V and draws a typical supply current of 18mA per channel. It provides a gain bandwidth product of 400MHz and a slew rate of 2500V/μs, ensuring fast signal response. The component is housed in an 8-pin SOIC package suitable for surface mount applications.

Feature Summary

• Integrated output-limiting clamp circuitry prevents damage to subsequent stages during overvoltage events
• Differential architecture supports high-speed signal processing with balanced noise rejection
• Wide supply voltage range accommodates various system power requirements

Applications

• High-speed data acquisition systems
• RF intermediate frequency amplification
• Video signal processing circuits

Procurement Notes

Verify the specific suffix 'SD' against the manufacturer's official documentation to confirm the exact package type and tape-and-reel specifications. Ensure the NOPB designation aligns with current RoHS compliance standards as defined in the latest datasheet revision. Cross-reference the part number with Texas Instruments records, as they are the successor to National Semiconductor products.

Selection Notes

Select this component when differential signaling with inherent overvoltage protection is required. The 400MHz bandwidth suits applications needing moderate-to-high speed amplification without external clamping diodes. Consider the 8-pin SOIC footprint for PCB layout constraints. Evaluate the 18mA quiescent current against total system power budgets compared to lower-power alternatives.

Part Context

The LMH6553 belongs to the LMH655x family of wideband amplifiers designed for demanding analog signal paths. As a successor to earlier National Semiconductor designs now managed by Texas Instruments, it maintains compatibility with legacy high-speed architectures while offering improved robustness through internal protection features.

Replacement Considerations

Consult the official datasheet for direct pin-compatible substitutes within the LMH655x series. Verify that any alternative maintains the differential configuration and output clamp functionality.