MAX4466EXK

Audio Amplifiers Overview

The MAX4466EXK+T is a single-channel, decompensated operational amplifier optimized for microphone preamplifier applications. It operates from a +2.4V to +5.5V supply and features a 600kHz gain bandwidth product with a minimum stable gain of +5V/V. The device delivers a typical quiescent supply current of 24µA and includes rail-to-rail outputs capable of swinging within 16mV of the rails into a 10kΩ load. Key electrical characteristics include a common-mode rejection ratio of 126dB, power-supply rejection ratio of 112dB, and an open-loop gain of 125dB.

Audio Amplifiers Feature Summary

• Optimized for microphone preamplifiers with high common-mode and power-supply rejection ratios
• Decompensated design providing a 600kHz gain bandwidth product at a minimum stable gain of +5V/V
• Rail-to-Rail output stage enabling full voltage swing capability in ultra-small packages

Audio Amplifiers Applications

• Microphone Preamplifiers
• Hearing Aids
• Cellular Phones
• Voice-Recognition Systems
• Portable Computing

Audio Amplifiers Procurement Notes

Verify that the component matches the specific part number MAX4466EXK+T, noting the 'E' package code for SC70 and '+T' suffix indicating lead-free/RoHS compliance. Confirm the manufacturer is Analog Devices Inc./Maxim Integrated. Ensure the datasheet revision aligns with the required specifications, particularly regarding the 600kHz GBWP and minimum stable gain constraints.

Audio Amplifiers Selection Notes

Select this component when a high-speed, low-power solution is required for microphone amplification where a minimum closed-loop gain of +5V/V is acceptable. It is suitable for noisy environments due to its superior CMRR and PSRR. Note that unlike the MAX4467/MAX4468 variants, this model does not include a shutdown pin or switched bias supply, making it appropriate for always-on designs.

Audio Amplifiers Part Context

The MAX4466EXK+T belongs to the MAX4465–MAX4469 family of micropower op amps designed specifically for microphone preamplifier use. While the MAX4465/4467/4469 are unity-gain stable with 200kHz GBWP, the MAX4466/4468 are decompensated for higher speed (600kHz GBWP). This specific part is housed in a 5-pin SC70 package, offering a space-saving footprint compared to the 8-pin SOT23 versions available in the series.

Audio Amplifiers Replacement Considerations

For direct functional replacement within the same family, consider the MAX4466EUK+T, which shares identical electrical characteristics but utilizes an 8-pin SOT23 package instead of the 5-pin SC70. Other family members like the MAX4465 or MAX4467 offer different stability profiles or additional shutdown features.