MAX98380

RECOMMENDED FOR NEW DESIGNS

Small, Boosted, Digital Input Class-D Amplifier

Integrating a 3X Charge Pump Based Boost Delivers 9W Peak Power and Eliminates the Large and Expensive Inductors

Data Sheet (Rev. 0) Product Selection Table

Part Models: 2
1ku List Price: price unavailable

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Overview

Integrated Capacitive Boost Converter—No Bulky Inductors
3.6W Output Power into 6Ω at V_BAT = 3.7V
10mW Total Quiescent Power
3ms Turn-On Time
80% Efficiency (1.0W into R_L = 8Ω, V_BAT= 3.7V)
19.8μV_RMS Speaker Mode Output Noise
16.5μV_RMS Receiver Mode Output Noise
Low 0.005% THD+N at 1kHz
No MCLK Required
Sample Rates of 8kHz to 192kHz
Supports Left, Right, or (Left/2 + Right/2) Output in I²S and Left-Justified Modes
Sophisticated Edge Rate Control Enables Filterless Class-D Outputs
Low RF Susceptibility Rejects TDMA Noise from GSM Radios
Class-D Switching Frequency Trimmed to 10% for Better EMI Planning
Extensive Click-and-Pop Reduction Circuitry
Dynamic Headroom Tracking (DHT)
Robust Short-Circuit and Thermal Protection
Available in Space-Saving Package: 1.468mm x 2.138mm, 24-Bump WLP (0.35mm Pitch)

The MAX98380 is a small, mono Class-D audio amplifier featuring an integrated capacitive boost converter. The device implements a tripler charge pump-based boost converter that efficiently delivers up to 4.85W at 1% THD+N into an 8Ω load. The capacitive boost replaces the large and expensive inductor required for an inductive boost with smaller, lower-profile capacitors that reduce the total PCB solution.

Additionally, as the power-supply voltage varies due to declining battery life, an on-chip limiter (DHT) automatically optimizes the headroom available to the Class-D amplifier to maintain consistent distortion and listening levels.

Thermal-foldback protection ensures robust behavior when the thermal limits of the device are reached. When enabled, it automatically reduces the output power when the temperature exceeds a user-specified threshold. This allows for uninterrupted music playback even at high ambient temperatures. Traditional thermal protection is also available in addition to robust overcurrent protection.

The device provides a PCM interface for audio data and a standard I²C interface for control data communication. The PCM interface supports audio playback using I²S, left-justified, and TDM audio data formats. A unique clocking structure eliminates the need for an external master clock for PCM communication. This reduces EMI and possible board coupling issues in addition to reducing the size and pin count.

Active emissions-limiting and edge-rate limiting circuitry greatly reduce EMI. A filterless spread-spectrum modulation scheme eliminates the need for output filtering found in traditional Class-D devices and reduces the component count of the solution.

The IC is available in a 0.35mm pitch 24-bump wafer-level package (WLP). It is specified over the extended, -40°C to +85°C temperature range.

Applications

Smartphones
Smart Speakers
IoT Devices
Tablets

Part Models: 2
1ku List Price: price unavailable

Documentation

Data Sheet 1

MAX98380: Small, Boosted, Digital Input Class-D Amplifier Data Sheet (Rev.0) 06/08/2022

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
MAX98380EWG+	24-WLCSP-N/A	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX98380EWG+T	24-WLCSP-N/A	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

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

Software Resources

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Tools & Simulations

Software Development 1

MAX98380 EVKIT Software V1.0, 1.0.0

Evaluation Kits

Evaluation System for the MAX98380

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Features and Benefits

2.5V to 5V Single-Supply Operation
USB Audio Streaming (EV System)
I²S, Left-Justified, or TDM Input
Capacitive Charge Pump Boost Circuitry
Fully Assembled and Tested

Product Details

The MAX98380 evaluation system (EV system) is a fully assembled and tested system that evaluates the MAX98380 boosted Class-D audio amplifier. The EV system consists of the MAX98380 Development Board (DEV board), Analog Devices 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. The MAX98380 supports standard I²S, left-justified, and TDM digital audio interfaces.

The AUDINT3 board provides a USB-to-PCM interface in addition to a 1.8V VDD supply needed to evaluate the DEV board. The MAX98380 DEV board requires one additional supply input, 2.5V to 5.5V (VBAT) when evaluating using the AUDINT3 board. Figure 1 details the DEV board and the AUDINT3 board.