MAX98388EWE+T

Audio Amplifiers Overview

The MAX98388EWE+T is a mono digital input Class-D amplifier featuring integrated IV feedback and brownout protection. It operates on a PVDD supply range of 2.3V to 10V, supporting single-cell (up to 5.5V) and two-cell/boosted (up to 10V) configurations. The device delivers up to 9.1W into 4Ω at 10V with THD+N ≤ 1%. Key electrical parameters include an A-weighted dynamic range of 111dB, output noise of 10μVRMS in single-cell mode, and efficiency reaching 90% at 1W into 8Ω. It utilizes a PCM interface for audio data and I2C for control, eliminating the need for an external reference clock.

Audio Amplifiers Feature Summary

• Integrates precision current sense and voltage feedback channels transmitted via the audio data output for DSP-based speaker protection and haptic functions.
• Employs Active Emissions-Limiting (AEL), edge-rate limiting, and spread-spectrum modulation to reduce EMI and eliminate external output filtering.
• Includes programmable Automatic Level Control (ALC) for battery brownout protection alongside robust thermal and short-circuit safeguards.
• Features a unique clocking structure that removes the requirement for an external high-frequency reference clock, reducing pin count and interface power.

Audio Amplifiers Applications

• AR/VR Wearables
• LRA Haptic Drive
• Smart Watches and IoT Devices
• Gaming Devices
• Notebooks and Tablets

Audio Amplifiers Procurement Notes

Verify the specific suffix 'EWE+T' against the manufacturer's official ordering guide to confirm package type and RoHS compliance status. Ensure compatibility with the 16-bump WLP footprint and 0.4mm pitch requirements during PCB layout. Confirm that the selected variant matches the intended supply voltage application, as the MAX98388 is optimized for single-cell use while the MAX98389 targets two-cell scenarios.

Audio Amplifiers Selection Notes

Select this component when designing portable systems requiring high-efficiency audio playback combined with advanced speaker monitoring capabilities. The integrated IV feedback allows for complex algorithms like bass boosting and haptic drive without additional sensing hardware. Choose based on the target supply voltage; the MAX98388 is suitable for single-cell applications up to 5.5V, whereas higher voltage boosted or two-cell designs may require the MAX98389 variant.

Audio Amplifiers Part Context

This device belongs to the MAX98388/MAX98389 family of digital input Class-D amplifiers from Analog Devices/Maxim Integrated. These amplifiers are designed to provide Class-AB level audio performance with the efficiency necessary to extend battery life in portable electronics. The series emphasizes low EMI through proprietary modulation techniques and offers extensive diagnostic feedback via the audio interface.

Audio Amplifiers Replacement Considerations

The MAX98389EWE+T is the primary alternative within the same datasheet, optimized for two-cell or boosted applications up to 10V. Verify register compatibility and supply voltage ranges before substitution. Other Maxim Class-D amplifiers may lack the specific IV feedback integration or filterless EMI reduction features found in this model.

Audio Amplifiers FAQ

Does the MAX98388EWE+T require an external reference clock?

No, the device features a unique clocking structure that eliminates the need for an external high-frequency reference clock, which reduces device size and potential EMI issues.

How does the device handle EMI without output filters?

It uses Active Emissions-Limiting (AEL), edge-rate limiting circuitry, and a spread-spectrum modulation (SSM) scheme to significantly reduce EMI, allowing for filterless operation.

What is the purpose of the IV feedback channels?

The precision output current sense and voltage feedback channels transmit data over the audio output, enabling host DSP algorithms for audio enhancement, speaker protection, and haptic functions.