Analog Devices Inc./Maxim Integrated MAX98389EVSYS#

Overview

MAX98389EVSYS# from Analog Devices is an evaluation system designed to validate the MAX98389 Class-D audio amplifier IC in real-world wearable and portable audio applications. It includes a fully assembled MAX98389 development board, Audio Interface Board III (AUDINT3), and micro-USB cable - supporting USB audio streaming, I²S/TDM digital input, and single-supply operation from 2.3V to 10V PVDD with on-board 1.8V VDD regulation.

For engineers reviewing the MAX98389EVSYS# datasheet, MAX98389EVSYS# pinout, MAX98389EVSYS# application, or MAX98389EVSYS# equivalent, this EV system enables rapid validation of audio performance, register configuration, power sequencing, and USB-to-PCM interface interoperability without external test equipment.

Technical Context

The MAX98389EVSYS# integrates two hardware layers: the MAX98389 DEV board (WLP16 package, 16-pin) hosting the Class-D amplifier with IV feedback, and the AUDINT3 board providing USB-to-PCM conversion, 1.8V LDO regulation, and automatic VDD provisioning via J1 connector. The system supports both standalone evaluation (dual-supply: PVDD + VDD) and plug-and-play mode (PVDD only, with AUDINT3 supplying VDD).

Digital audio routing is configurable across I²S, left-justified, or TDM formats at up to 48kHz; the AUDINT3 board delivers BCLK, LRCLK, and DIN signals to the DEV board's J3 header (8-pin DAI interface), while enabling software-controlled register access via I²C over SDA/SCL lines routed through J1.

Key Specifications

Availability

MAX98389EVSYS# is available at Aetrix Electronics and suitable for audio subsystem validation, wearable device prototyping, and portable speaker reference design requiring stable component supply and full-stack evaluation capability.

Supply support for MAX98389EVSYS# includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, communications, and audio markets.

The MAX98389EVSYS# belongs to Analog Devices' ultra-low-power audio evaluation platform family, engineered specifically for compact, battery-powered wearables and hearables requiring high-efficiency Class-D amplification with minimal EMI and integrated feedback control.

FAQ

What is the primary function of the MAX98389EVSYS#?

The MAX98389EVSYS# is a complete evaluation system for the MAX98389 Class-D audio amplifier IC. It enables engineers to verify audio performance, configure registers via I²C, test USB audio streaming, and evaluate power efficiency and thermal behavior in wearable-grade applications - all using a pre-assembled, tested hardware stack including the DEV board and AUDINT3 interface board.

Does the MAX98389EVSYS# require external power supplies beyond USB?

Yes - the MAX98389EVSYS# requires an external DC supply (2.3V–10V, ≥4A) applied to the PVDD binding posts on the DEV board. While the AUDINT3 board provides 1.8V VDD via J1, PVDD must be supplied externally to power the Class-D output stage. No additional VDD supply is needed when using AUDINT3.

Can the MAX98389EVSYS# be used without the AUDINT3 board?

Yes - the MAX98389EVSYS# DEV board supports standalone operation with dual supplies (PVDD and VDD) and direct digital audio input via the J3 DAI header (BCLK, LRCLK, DIN). In this mode, external audio test equipment (e.g., Audio Precision) drives the interface, and the AUDINT3 board is not required.

Which software is required to operate the MAX98389EVSYS#?

The official MAX98389 evaluation software (MAX9838xEVSwSetupVxx.exe) is required. It runs on Windows 7/10, provides GUI-based register configuration, block-diagram control, live status monitoring, and firmware-independent I²C communication. The installer includes FTDI USB drivers and is downloadable from maximintegated.com/evkitsoftware.

How does the MAX98389EVSYS# handle speaker output and EMI mitigation?

The MAX98389EVSYS# routes amplified audio differentially to FOUTP/FOUTN binding posts, supporting direct connection to 4Ω–8Ω speakers without filtering. For cables >30 cm, optional EMI suppression uses onboard pads for 100pF capacitors (C7/C9) and ferrite beads (FB1/FB2), with PCB traces removed per the schematic before installation.