LMH6645MFX

Instrumentation, Op Amps, Buffer Amps Overview

The LMH6645MFX is a single-channel operational amplifier manufactured by Texas Instruments, formerly National Semiconductor. It operates on a supply voltage range of 2.7V to 12V with a typical quiescent current of 650µA. The device features rail-to-rail input and output capabilities, a gain-bandwidth product of 55MHz, and a slew rate of 22V/µs. Key electrical specifications include an input offset voltage of 3mV, input bias current of 2µA, and common-mode rejection ratio ranging from 60dB to 84dB. It is housed in a 5-pin SOT-23 package.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Rail-to-rail input and output signal swing capability
• Integrated shutdown option for power management
• High slew rate of 22V/µs for fast transient response
• Low power consumption suitable for battery-operated systems

Instrumentation, Op Amps, Buffer Amps Applications

• Portable instrumentation
• Active filtering
• Video buffering
• Sensor signal conditioning

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the manufacturer designation as Texas Instruments, which acquired National Semiconductor. Confirm the specific suffix 'MFX' indicates the SOT-23-5 package and tape-and-reel packaging. Ensure RoHS compliance status matches the current production version. Cross-reference the datasheet revision to confirm pinout and electrical characteristics remain consistent with legacy documentation.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when a single-channel op-amp with rail-to-rail I/O is required in a small footprint. It is suitable for applications needing moderate bandwidth (55MHz) and low power consumption. Compare against dual-channel variants like the LMH6646 if multiple channels are needed. Consider the shutdown feature for systems requiring active power control.

Instrumentation, Op Amps, Buffer Amps Part Context

The LMH6645 belongs to the LMH664x family of high-speed, low-power operational amplifiers. This series includes single-channel (LMH6645), dual-channel (LMH6646), and quad-channel (LMH6647) variants. All share similar electrical characteristics but differ in channel count and package options. The family is designed for applications requiring both speed and low power dissipation.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Direct substitutes within the same family include the LMH6646 (dual channel) and LMH6647 (quad channel). Verify package compatibility, as the LMH6645 uses a 5-pin SOT-23. Other manufacturers offer similar rail-to-rail op-amps, but ensure bandwidth and shutdown functionality match requirements.