MAX9728AETC+TWGA8

Audio Amplifiers Overview

The MAX9728AETC+TWGA8 is a stereo headphone amplifier utilizing DirectDrive architecture for single-supply operation. It delivers up to 60mW per channel into a 32Ω load with 0.02% THD+N. The device operates from a 4.5V to 5.5V supply, consuming 3.5mA quiescent current and less than 0.1µA in shutdown mode. It features an internally preset gain of -1.5V/V, 80dB PSRR at 1kHz, and integrated click-and-pop suppression. The component is housed in a 12-pin Thin QFN (3mm x 3mm) package.

Audio Amplifiers Feature Summary

• DirectDrive architecture eliminates bulky DC-blocking capacitors by using a charge pump to create an internal negative supply, allowing ground-referenced outputs.
• Integrated comprehensive click-and-pop suppression circuitry prevents audible transients during startup and shutdown transitions.
• Low-power shutdown mode reduces supply current to less than 0.1µA, extending battery life in portable applications.
• High power-supply rejection ratio (PSRR) of 80dB at 1kHz enables operation from noisy digital supplies without additional linear regulators.

Audio Amplifiers Applications

• Notebook PCs
• LCD/PDP Displays
• DVD Players

Audio Amplifiers Procurement Notes

Verify the specific suffix TWGA8 against official manufacturer documentation to confirm tape-and-reel packaging details and lot traceability requirements. Confirm that the part status remains active or qualified for new designs, as availability may vary. Ensure compliance with RoHS3 standards and check for any lead-time constraints associated with this specific marking code before finalizing procurement plans.

Audio Amplifiers Selection Notes

Select the MAX9728AETC+TWGA8 when board space is limited and external DC-blocking capacitors must be avoided. Choose this model over the adjustable-gain MAX9728A variant if a fixed -1.5V/V gain is sufficient for the application. Ensure the design supports a single 4.5V to 5.5V supply rail and requires low quiescent current consumption for portable devices.

Audio Amplifiers Part Context

This component belongs to the MAX9728 family of 60mW DirectDrive stereo headphone amplifiers manufactured by Analog Devices Inc./Maxim Integrated. The family includes variants with adjustable gain (MAX9728A) and fixed gain (MAX9728B). The ETTC package designation indicates a 12-pin Thin QFN form factor designed for surface-mount assembly in space-constrained portable electronics.

Audio Amplifiers Replacement Considerations

The MAX9728BEUD+ serves as a pin-compatible alternative within the same family, offering fixed gain but in a 14-pin TSSOP package. Verify package dimensions and thermal characteristics when substituting between QFN and TSSOP formats.