LMH6618MK/NOPB

Overview

The LMH6618MK/NOPB is a single-channel, high-speed operational amplifier manufactured by Texas Instruments. It features a gain-bandwidth product of 71 MHz and a slew rate of 57 V/µs. The device operates on a single supply voltage ranging from 2.7 V to 11 V with a typical operating current of 1.25 mA per channel. It offers rail-to-rail input and output capabilities, an input offset voltage of 1.3 mV, and an input bias current of 1.9 µA. The amplifier provides a common-mode rejection ratio of 108 dB and an input voltage noise density of 10 nV/√Hz. It supports a maximum output current of 35 mA per channel and includes a shutdown function. The component is housed in a SOT-23-6 package and operates within a temperature range of -40°C to +125°C.

Feature Summary

• Rail-to-rail input and output operation for maximum dynamic range
• Integrated shutdown control for power management
• High common-mode rejection ratio for signal integrity
• Low input voltage noise density for precision applications

Applications

• Portable instrumentation systems
• Video buffering and signal conditioning
• Battery-powered measurement devices
• Active filtering circuits

Procurement Notes

Verify the specific suffix MK against the official datasheet to confirm the SOT-23-6 thin package variant. Ensure the NOPB designation confirms RoHS compliance and absence of lead-based materials. Cross-reference the manufacturer part number with the distributor's catalog to avoid confusion with similar LMH6618 variants that may differ in packaging or thermal characteristics. Confirm the operating temperature range matches the application requirements before finalizing procurement.

Selection Notes

Select this component when a single-channel, low-power, high-speed amplifier is required in a compact surface-mount package. The rail-to-rail I/O capability makes it suitable for single-supply systems where maximizing signal swing is critical. Consider the 1.25 mA quiescent current for battery life constraints. Compare the 71 MHz bandwidth against system frequency requirements to ensure adequate performance margins without unnecessary power consumption.

Part Context

The LMH6618 belongs to Texas Instruments' LMH661x family of high-speed operational amplifiers designed for video and communication applications. This series emphasizes low power consumption while maintaining high bandwidth and slew rate performance. The MK suffix specifically denotes the SOT-23-6 thin package, distinguishing it from other package options like the SOIC-8 used in dual-channel variants such as the LMH6619. The family is engineered for portable and space-constrained designs requiring efficient power usage.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.