MAX4468EKA-T

Overview

The MAX4468EKA-T is a low-cost, micropower microphone preamplifier manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of 2.4 V to 5.5 V and features a single channel in an SOT-23-8 package. Key electrical parameters include a gain-bandwidth product of 0.6 MHz, input offset voltage of 5 mV, and input bias current of 100 nA. The device offers high performance metrics such as 80 dB common-mode rejection ratio (CMRR) and 112 dB power supply rejection ratio (PSRR). It functions in Class-AB mode with a maximum power dissipation of 421 mW and supports a shutdown feature for power management.

Feature Summary

• Designed specifically for microphone preamplification applications with low cost and micropower characteristics.
• Includes a dedicated shutdown pin to minimize power consumption when the device is not in use.
• Provides high common-mode rejection and power supply rejection ratios for signal integrity.

Applications

• Portable audio recording devices
• Voice recognition systems
• Consumer electronics with microphone inputs

Procurement Notes

Verify the exact part number suffix, as the provided model lacks the standard '+' designation often found in RoHS-compliant versions like MAX4468EKA+T. Confirm availability status through authorized distributors, as some listings indicate limited or restricted supply. Ensure the ordering information matches the specific tape and reel packaging requirements for surface mount assembly.

Selection Notes

Select this component for designs requiring a single-channel microphone preamp with low quiescent current and rail-to-rail output capabilities. Compare against the dual-channel MAX4469 if stereo input is needed. Consider the SC70/SOT23-8 footprint constraints during PCB layout. Verify that the 0.6 MHz bandwidth meets the frequency response requirements of the target audio application.

Part Context

The MAX4468 belongs to the MAX4465-MAX4469 family of microphone preamplifiers from Maxim Integrated. This series is characterized by micropower operation, high CMRR, and small package options like SC70 and SOT23. It serves as a general-purpose solution for amplifying signals from electret condenser microphones in battery-powered devices.

Replacement Considerations

The MAX4467EKA-T is a compatible alternative within the same family, offering similar specifications but potentially differing in shutdown functionality or specific trim values. Verify pin compatibility and electrical parameter overlaps before substitution.