LMH6553SDE

Overview

The LMH6553SDE is a fully differential amplifier with an integrated output limiting clamp, designed for high-speed signal processing. It features a bandwidth of 900 MHz and operates on a single supply voltage ranging from 4.5 V to 12 V. The device draws 33 mA at ±5 V and provides a common-mode rejection ratio of 82 dB. It utilizes a current feedback architecture and is housed in an 8-WSON package with an exposed pad, suitable for surface-mount applications across a temperature range of -40°C to +125°C.

Feature Summary

• Integrates an output limiting clamp to protect downstream components from overvoltage conditions.
• Provides high-speed signal conversion with a 900 MHz bandwidth for wideband applications.
• Operates on a single power supply within the 4.5 V to 12 V range.

Applications

• High-speed analog-to-digital converter (ADC) driver circuits
• Video signal conditioning and distribution
• RF intermediate frequency (IF) amplification

Procurement Notes

Verify the manufacturer designation carefully, as Texas Instruments acquired National Semiconductor. Ensure the specific suffix matches the required packaging format. Confirm RoHS compliance status through the official datasheet or component marking. Validate the operating temperature range requirements against the specified -40°C to +125°C limit before finalizing procurement.

Selection Notes

Select this component when a fully differential output is required to drive single-ended ADCs or transmission lines. The built-in output clamp simplifies protection design compared to standard amplifiers. Consider the 82 dB CMRR for applications requiring strong common-mode noise rejection. Evaluate the 33 mA supply current against system power constraints.

Part Context

This part belongs to the LMH655x family of fully differential amplifiers originally developed by National Semiconductor and now maintained by Texas Instruments. The series focuses on high-bandwidth performance with integrated protection features. The LMH6553 specifically targets video and RF applications requiring precise signal integrity and robust output handling capabilities.

Replacement Considerations

LMH6553SD/NOPB: Direct equivalent with updated manufacturing source and packaging suffix.

FAQ

What is the function of the output limiting clamp?

The output limiting clamp protects connected loads by restricting the output voltage swing to safe levels during fault conditions or excessive input signals.

Is the LMH6553SDE available in a leaded package?

No, the LMH6553SDE is specifically packaged in an 8-WSON (Wireless Small Outline No-lead) format with an exposed thermal pad.