MAX97220AETE+

Audio Amplifiers Overview

The MAX97220AETE+ is a differential input DirectDrive line driver and headphone amplifier manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single supply voltage ranging from 2.5V to 5.5V, utilizing an internal charge pump to generate a negative rail for bipolar output biasing. The device delivers 125mW of output power into a 32-ohm load with a 5V supply. It features externally adjustable gain via external resistors, achieving an 18-bit SNR performance of 112dB and flat THD+N better than 90dB across the audio band. The component is housed in a 16-pin TQFN package measuring 3mm x 3mm x 0.8mm and supports operation within an extended temperature range of -40°C to +85°C.

Audio Amplifiers Feature Summary

• DirectDrive architecture eliminates the need for large DC-blocking output capacitors by using an internal charge pump to create a negative supply rail, allowing outputs to be biased about ground.
• Fully differential inputs provide improved noise immunity against common-mode interference compared to single-ended configurations.
• Integrated click-and-pop suppression circuitry prevents audible transients during power-on and shutdown transitions.
• Footprint compatible with the legacy MAX9722 component, facilitating direct board upgrades.

Audio Amplifiers Applications

• Set-top boxes
• Blu-ray and DVD players
• LCD televisions
• Prosumer audio devices

Audio Amplifiers Procurement Notes

Verify the specific suffix 'EETE+' corresponds to the A-version variant with external gain setting and fast turn-on time. Confirm RoHS compliance status through official manufacturer documentation. Ensure the ordering part number matches the required pin configuration and thermal pad specifications for the TQFN-EP package before finalizing procurement.

Audio Amplifiers Selection Notes

Select this component when high-fidelity audio reproduction is required alongside space-constrained designs that benefit from the elimination of bulky coupling capacitors. The external gain setting allows flexibility for various codec interfaces. Consider the 5.5ms turn-on time suitability for headphone applications versus the slower variants intended for set-top boxes.

Audio Amplifiers Part Context

This device belongs to the MAX97220 family of DirectDrive amplifiers. It serves as a modern replacement or upgrade path for older components like the MAX9722, offering enhanced electrical performance including higher signal-to-noise ratios and lower distortion while maintaining physical footprint compatibility for existing PCB layouts.

Audio Amplifiers Replacement Considerations

The MAX97220AETE+ is footprint-compatible with the MAX9722. When replacing the MAX9722, ensure the BIAS/SVSS pin connection strategy is adjusted; specifically, remove any zero-ohm resistor connecting BIAS to PVSS if present in the original design, as these pins are internally connected in the MAX9720 series.

Audio Amplifiers FAQ

How does the DirectDrive architecture differ from conventional headphone amplifiers?

Conventional amplifiers bias outputs at half the supply voltage, requiring large DC-blocking capacitors. The MAX97220 uses an internal charge pump to create a negative rail, biasing outputs around ground and eliminating the need for these capacitors.

What is the function of the SHDN pin?

The SHDN pin is an active-low shutdown input. Driving it low disables internal bias circuitry and places outputs in a high-impedance state to reduce power consumption.