MAX4469EKA+T

Audio Amplifiers Overview

The MAX4469EKA+T is a dual-channel, micropower operational amplifier optimized for microphone preamplifier applications. It operates from a single +2.4V to +5.5V supply with a typical quiescent supply current of 24µA per amplifier. The device features a 200kHz gain bandwidth product and unity-gain stability. Key electrical characteristics include an input offset voltage of ±5mV, an input bias current of ±100nA, a common-mode rejection ratio of 80dB (minimum), and a power-supply rejection ratio of 112dB (minimum). It utilizes an 8-pin SOT23 package and supports an operating temperature range of -40°C to +85°C.

Audio Amplifiers Feature Summary

• Dual-channel architecture providing two independent amplifiers in a compact footprint
• Rail-to-Rail output stage capable of driving loads close to the supply rails
• High common-mode and power-supply rejection ratios for operation in noisy environments
• Low quiescent supply current suitable for battery-powered portable devices

Audio Amplifiers Applications

• Microphone Preamplifiers
• Hearing Aids
• Cellular Phones
• Voice-Recognition Systems
• Digital Dictation Devices

Audio Amplifiers Procurement Notes

Verify that the component matches the specific dual-channel configuration and 8-pin SOT23 package requirements. Confirm RoHS compliance status as indicated by the suffix. Ensure the selected variant meets the required operating temperature range and channel count for the intended application design.

Audio Amplifiers Selection Notes

Select this part when a dual-channel solution is required within space-constrained designs. It is appropriate for applications needing low power consumption alongside high noise immunity. Consider alternative single-channel variants if only one amplifier path is necessary to minimize board area and cost.

Audio Amplifiers Part Context

This component belongs to the MAX4465–MAX4469 family of micropower op amps designed specifically for microphone preamplification. While other members like the MAX4467/MAX4468 offer shutdown modes, the MAX4469 provides dual channels without shutdown functionality. It shares the same low-power and high-rejection characteristics as its single-channel counterparts.

Audio Amplifiers Replacement Considerations

Direct substitutes within the family include the MAX4465EXK+T or MAX4465EUK+T for single-channel applications. For dual-channel needs, verify pin compatibility with other SOT23-8 audio amplifiers if form-factor changes are permissible.