LMH6518SQ/S7002553

Instrumentation, Op Amps, Buffer Amps Overview

The LMH6518 is a digitally controlled variable gain amplifier featuring a 40dB gain range with 2dB step sizes. It maintains a 900MHz -3dB bandwidth across all settings, supporting rise and fall times under 500ps and recovery times under 5ns. The device operates on a 5V analog supply and a 3.3V digital supply, consuming up to 1.1W. It includes an auxiliary output for trigger functions and selectable bandwidth limiting filters ranging from 20MHz to full bandwidth.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Digitally programmable gain control via SPI-compatible serial bus
• Integrated overvoltage clamps for fast signal recovery
• Selectable bandwidth limiting circuitry for noise reduction
• Differential outputs with independent common-mode voltage control

Instrumentation, Op Amps, Buffer Amps Applications

• Oscilloscope programmable gain amplifiers
• Differential ADC drivers
• High-frequency single-ended input to differential conversion
• Precision gain control applications
• RF/IF applications

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific package suffix (RGH) against the required footprint. Confirm power supply requirements match the 5V analog and 3.3V digital specifications. Ensure thermal management solutions account for the WQFN package's thermal resistance characteristics during operation.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when high-speed gain adjustment is required without bandwidth degradation. Consider the auxiliary output if oscilloscope triggering or parallel signal monitoring is needed. Evaluate the integrated bandwidth filters to determine if external filtering can be omitted in the design.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to Texas Instruments' family of high-speed variable gain amplifiers designed for precision signal conditioning. It integrates preamplifier stages and ladder attenuators to achieve wide dynamic range performance suitable for demanding measurement and communication systems.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

LMH6518EVM

Instrumentation, Op Amps, Buffer Amps FAQ

Does the bandwidth change with gain settings?

No, the LMH6518 maintains a constant 900MHz -3dB bandwidth at all gain settings.

What is the purpose of the auxiliary output?

The auxiliary output follows the main output and is primarily intended for use in oscilloscope trigger function circuitry.