MAX98395

PRODUCTION

11.7W Digital Input Class DG Amplifier with I/V Sense and Ultra-Low Quiescent Power

Filterless, Wide-Supply Class DG Amplifier with Ultra-Low Quiescent Power

Data Sheet (Rev. 0) Product Selection Table

Part Models: 2
1ku List Price: Starting From $1.13

Viewing:

Overview

Wide Input Supply Range (3.0V to 14V)
Class-DG Operation Enables Industry Leading Quiescent Power
- 16mW at V_PVDD = 3.8V
- 15mW at V_PVDD = 12V
Ultra-Low Noise Floor
- 11µV_RMS Output Noise
- 116dB Dynamic Range
Low Distortion
- -83dB THD+N at 2W into 8Ω, f = 1kHz and 3kHz
- -77dB THD+N at 2W into 8Ω, f = 6kHz
Output Power at 1% THD+N:
- 7.7W into 8Ω, V_PVDD = 12V
- 11.7W into 4Ω, V_PVDD = 12V
Speaker Amplifier Efficiency:
- 88% at 5W into 8Ω, V_PVDD = 12V
Class-D EMI Reduction Enables Filterless Operation
- Spread-Spectrum Modulation
- Switching Edge Rate Control
Integrated Speaker Current and Voltage Sense Requires no External Components
I²S/16-Channel TDM and I²C Digital Interfaces
Playback and IV Paths Support Sample Rates up to 96kHz
Dynamic Headroom Tracking (DHT) Maintains a Consistent Listening Experience
Extensive Click-and-Pop Suppression
28-Bump WLP (1.62mm x 2.88mm x 0.5mm, 0.4mm Pitch)

The MAX98395 is a 11.7W high-efficiency, mono Class-DG speaker amplifier with industry leading quiescent power and a wide supply range that can even support single cell Li+ batteries or an external boost. MAX98395 also features current and voltage sense (I/V sense) and dynamic headroom tracking (DHT). Precision output current and voltage monitoring (I/V sense) enables speaker protection algorithms to be run by a host device. Spread spectrum modulation (SSM) and edge rate control minimize EMI and eliminate the need for the output filtering found in traditional Class-D devices.

To achieve industry-leading quiescent power, the Class-DG amplifier employs two supply rails, VBAT and PVDD, to supply the speaker amplifier. Additionally, as the power-supply voltage varies due to sudden transients and declining battery life, DHT automatically optimizes the headroom available to the Class-DG amplifier to maintain consistent distortion and listening levels. The DHT block provides both a dynamic range compressor (DRC) and a limiter that can operate as either a signal distortion limiter (SDL) or standard signal level limiter (SLL).

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. In TDM mode, the device can support up to 16 channels of audio data. A unique clocking structure eliminates the need for an external master clock for PCM communication, which reduces pin count and simplifies board layout.

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 over-current protection.

The device is available in a 0.4mm pitch, 28-bump wafer-level package (WLP). The device operates over the extended -40°C to +85°C temperature range.

Applications

Mobile Speakers
Notebook Computers
Smart IoT
Smart Speakers
Soundbars
Tablets

Part Models: 2
1ku List Price: Starting From $1.13

Documentation

Data Sheet 1

MAX98395: 11.7W Digital Input Class DG Amplifier with I/V Sense and Ultra-Low Quiescent Power Data Sheet (Rev.0) 07/16/2021

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
MAX98395EWI+	28-WLCSP-N/A	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX98395EWI+T	28-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

Can't find the software or driver you need?

Request a Driver/Software

Tools & Simulations

Software Development 1

MAX98395EVSYS# Evaluation GUI 1.3.3, 1.3.3

Evaluation Kits

Evaluation Kit for the MAX98395

Buy Now View Details

Features and Benefits

Complete Hardware System with Easy Setup; No Tools or Special Equipment Required
Easy to use Graphical User Interface (GUI) Evaluation Software (Windows 7/10 Compatible)
- Complete Access to all Hardware Registers

Product Details

The MAX98395 evaluation system (EV system) evaluates the MAX98395 mono Class-D audio amplifier featuring dynamic headroom tracking (DHT) and clock-and-data monitoring. The EV system consists of the IC development board (DEV board), Maxim’s audio interface board III (AUDINT3), USB cable, and IC evaluation software.

It is recommended that the DEV board be evaluated with the AUDINT3 board, as an EV system. The IC supports standard I²S, left-justified, and TDM digital audio interfaces, as well as I²C for control.

The AUDINT3 board provides the USB-to-PCM and USBto-I²C interfaces in addition to the 1.8V AVDD supply and the 1.2V DVDD and DVDDIO supplies that are needed to evaluate the DEV board. The IC DEV board requires two additional supply inputs, 3V to 5.5V (VBAT) and 3V to 14V (PVDD). Figure 1 details the DEV board and the AUDINT3 board.

The MAX98395 Evaluation Software provides complete access to all hardware registers.