MAX98361

RECOMMENDED FOR NEW DESIGNS

Tiny, Cost-Effective, Plug-and-Play Digital Class-D Amplifier

One-of-a-Kind Filterless, High-Performance Class-D Amplifier in a Tiny WLP Package with no Vias or Programming Required

Data Sheet (Rev. 1) Product Selection Table

Part Models: 8
1ku List Price: Starting From $0.78

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Part Details

Simple Plug-and-Play Design
Single-Supply Operation (2.5V to 5.5V)
3.2W Output Power into 4Ω at 5V
2.2mA Quiescent Current
1ms Turn-On Time (for MAX98361A and MAX98361B)
92% Efficiency (R_L = 8Ω, THD+N = 10%)
10μV_RMS Output Noise
110dB Dynamic Range
Low 0.009% THD+N at 1kHz
No MCLK Required
Sample Rates of 8kHz to 96kHz
Supports Left, Right, or (Left/2 + Right/2) Output in I²S and Left-Justified Modes
Sophisticated Edge Rate Control Enables Filterless Class-D Outputs
81dB PSRR at 217Hz
1.5μA Standby Current Allows Elimination of GPIO for EN Pin
Low RF Susceptibility Rejects TDMA Noise from GSM Radios
Class-D Switching Frequency Trimmed to 5% for Better EMI Planning
Extensive Click-and-Pop Reduction Circuitry
Robust Short-Circuit and Thermal Protection
Available in Space-Saving Package: 9-Pin WLP (0.4mm Pitch)
3.69mm² Solution Size for WLP With A Single Bypass Capacitor

Part Models: 8
1ku List Price: Starting From $0.78

Documentation

Data Sheet 1

MAX98361: Tiny, Cost-Effective, Plug-and-Play Digital Class-D Amplifier Data Sheet (Rev.1) 10/23/2023

Technical Articles 1

Open-Ear Audio: Enhanced, High Quality Solutions for AR/VR Applications 04/02/2024

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX98361AEWL+	9-WLCSP-N/A	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX98361AEWL+T	9-WLCSP-N/A	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX98361BEWL+	9-WLCSP-N/A	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX98361BEWL+T	9-WLCSP-N/A	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX98361CEWL+	9-WLCSP-N/A	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX98361CEWL+T	9-WLCSP-N/A	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX98361DEWL+	9-WLCSP-N/A	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX98361DEWL+T	9-WLCSP-N/A	Material Declaration Reliablity Data	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Evaluation Kits

Evaluation System for the MAX98361

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Features and Benefits

2.5V to 5.5V Single-Supply Operation
I²S, Left-Justified, or TDM Input
Five Selectable Gains (-3dB, 3dB, 6dB, 9dB, and 12dB)
Audio Channel Select (Left, Right, and Mono Mix)
Filterless Operation
Low EMI
Complete Hardware System with Easy Setup, No Tools or Special Software Required

Product Details

The MAX98361 evaluation system (EV system) is a fully assembled and tested system that evaluates the MAX98361A/B/C/D mono Class-D audio amplifiers. The EV system consist of a MAX98361 Development Board (DEV board), Maxim’s Audio Interface Board III (AUDINT3), and a USB cable.

It is recommended that the DEV board be evaluated with the AUDINT3 board, as an EV system. MAX98361A and MAX98361C support the standard I²S interface, and MAX98361B and MAX98361D support standard left-justified mode. All MAX98361 variants support an 8-channel TDM digital audio interface.

The AUDINT3 board provides the USB-to-PCM interface in addition to the 1.8V V_DDIO supply needed to evaluate the DEV board. The MAX98361 DEV board requires one additional supply input, 2.5V to 5.5V (V_DD) when evaluating using the AUDINT3 board. Figure 1 details the DEV board and the AUDINT3 board.

Applications