Analog Devices Inc./Maxim Integrated MAX98365BEVSYS#

Overview

MAX98365BEVSYS# from Analog Devices is a fully assembled and tested evaluation system designed to characterize the MAX98365B mono Class-D audio amplifier IC in left-justified digital audio interface mode. It delivers up to 4.5W into 4Ω at 14V PVDD, supports five selectable gains (9.5dB–21.5dB), enables mono-mix channel selection, and operates filterlessly with low EMI for rapid prototyping of portable audio systems.

For engineers reviewing the MAX98365BEVSYS# datasheet, MAX98365BEVSYS# pinout, MAX98365BEVSYS# application, or MAX98365BEVSYS# equivalent, this kit provides plug-and-play USB audio playback via the included Audio Interface Board III (AUDINT3), eliminates need for external logic analyzers or custom firmware, and supports standalone evaluation with external audio test equipment including Audio Precision systems.

Technical Context

The MAX98365BEVSYS# integrates the MAX98365B DEV board and Maxim's AUDINT3 board to form a complete hardware evaluation platform. The DEV board hosts the WLP9-packaged MAX98365B IC, configured for left-justified PCM input, while the AUDINT3 supplies 1.8V VDDIO and converts USB audio streams to left-justified BCLK/LRCLK/DIN signals at 48kHz sample rate.

Hardware configuration is managed via physical jumpers: J5 selects mono-mix channel mode, J7 sets gain (e.g., 21.5dB for 14V PVDD), J6 enables/disables shutdown, and J13 isolates or routes AUDINT3-supplied VDD. The DAI header (J2) provides direct access to BCLK, LRCLK, and DIN pins for external stimulus injection.

Key Specifications

Availability

MAX98365BEVSYS# is available at Aetrix Electronics and suitable for audio subsystem validation, embedded voice interface development, and portable speaker reference design requiring stable component supply and full production-representative evaluation capability.

Supply support for MAX98365BEVSYS# 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 (DSP) technologies, serving industrial, automotive, communications, and consumer markets with precision signal chain solutions.

The MAX98365BEVSYS# belongs to Analog Devices' audio evaluation systems product line, engineered specifically to accelerate time-to-audio for Class-D amplifier integration in battery-powered and space-constrained applications such as smart speakers, wearables, and IoT voice endpoints.

FAQ

What does MAX98365BEVSYS# evaluate, and how does it differ from other MAX98365 EV systems?

MAX98365BEVSYS# evaluates only the MAX98365B variant configured for left-justified digital audio input - not I2S or TDM modes. Unlike MAX98365AEVSYS# (I2S, no ramping) or MAX98365CEVSYS# (I2S, with volume ramping), MAX98365BEVSYS# lacks volume ramping functionality and is hardwired for left-justified timing alignment. Its jumper layout (J5/J7) and AUDINT3 firmware are calibrated exclusively for MAX98365B's left-justified protocol compliance.

Can MAX98365BEVSYS# be used to evaluate MAX98365A, MAX98365C, or MAX98365D?

No - MAX98365BEVSYS# is not compatible with MAX98365A, MAX98365C, or MAX98365D. Those variants require different digital interface timing: MAX98365A/C use I2S, and MAX98365D uses left-justified with volume ramping. Using MAX98365BEVSYS# with non-B variants risks misaligned LRCLK/BCLK sampling, failed USB enumeration, or incorrect gain/channel behavior due to mismatched firmware and jumper defaults in the AUDINT3 board.

Does MAX98365BEVSYS# include both the DEV board and AUDINT3 board?

Yes - MAX98365BEVSYS# is a complete evaluation system that includes the MAX98365 Development Board (DEV board), the Audio Interface Board III (AUDINT3), and a micro-USB cable. No additional boards or interface adapters are required to begin USB audio playback testing. The DEV board is pre-assembled with U1 = MAX98365B in WLP9 package and all necessary passive components per the official BOM.

What power supplies are needed to operate MAX98365BEVSYS#?

Two power sources are required: (1) a 3V–14V, 3A DC supply connected to the PVDD and GND binding posts on the DEV board, and (2) a standard USB 2.0 port (5V) powering the AUDINT3 board via the micro-USB cable. The AUDINT3 board autonomously regulates and supplies 1.8V to the DEV board's VDDIO pin through J1 - no separate VDD supply is needed unless J13 is opened for external control.

How is audio channel selection implemented on MAX98365BEVSYS#?

Channel selection on MAX98365BEVSYS# is implemented exclusively via hardware jumpers on the DEV board: mono-mix mode is selected by placing a triple-shunt across all three pins of J5 (DAI C configuration), which internally sums left and right channels. Left-only or right-only modes are not enabled by default and require reconfiguration of J3/J4 - but those configurations are unsupported for MAX98365B per its datasheet and will not produce valid audio output without firmware modification.