MAX98358

PDM Input Class D Audio Power Amplifier

High-Performance, Low-Noise Digital Input Class D Amplifier

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Overview

Features and Benefits
Product Details

Features and Benefits

Single-Supply Operation (2.5V to 5.5V)
3.2W Output Power into 4Ω at 5V
1.8mA Quiescent Current (V_DD = 3.7V)
92% Efficiency (R_L = 8Ω, P_OUT = 1.5W)
29µV_RMS Output Noise (A_V = 6dB)
Low 0.013% THD+N at 1kHz
Supported PDM_CLK Rates of 1.84MHz–4.32MHz and 5.28MHz–8.64MHz
Supports Left, Right, or Left/2 + Right/2 Outputs
Sophisticated Edge Rate Control Enables Filterless Class D Outputs
77dB PSRR at 217Hz
Low RF Susceptibility Rejects TDMA Noise from GSM Radios
Extensive Click-and-Pop Reduction Circuitry
Robust Short-Circuit and Thermal Protection
Available in Space-Saving Packages: 1.345mm x 1.435mm WLP (0.4mm Pitch), 3mm x 3mm TQFN

Product Details

The MAX98358 is a digital pulse-density modulated (PDM) input Class D power amplifier that provides Class AB audio performance with Class D efficiency. This IC offers five selectable gain settings (3dB, 6dB, 9dB, 12dB, and 15dB) set by a single gain-select input (GAIN). The IC can be configured to produce a left channel, right channel, or (left/2 + right/2) output from the stereo input data.

The MAX98358 takes a stereo pulse density modulated (SPDM) input signal directly into the DAC. Data on the rising edge of PDM_CLK is considered left-channel data while data on the falling PDM_CLK edge is right channel. A mono sum feature is also implemented with SPDM data input by summing the data from both rising and falling clock edges.

Active emissions-limiting, edge-rate limiting, and overshoot control 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 9-pin WLP (1.345mm x 1.435mm x 0.64mm) and 16-pin TQFN (3mm x 3mm x 0.75mm) packages and is specified over the -40°C to +85°C temperature range.

Applications

Cellular Phones
Notebook and Netbook Computers
Portable Media Players
Tablets

Product Categories

Audio Products

Markets and Technologies

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Product Lifecycle Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (5)

MAX98358DEV#TQFN

Evaluation Kit for the MAX98358

MAX98358EVSYS#TQFN

Evaluation Kit for the MAX98358

MAX98358EVSYS#WLP

Evaluation Kit for the MAX98358

MAX98358DEV#WLP

Evaluation Kit for the MAX98358

MAXAUDINT001

Evaluation Kit for the MAXQ2000/MAX98357A/MAX98357B/MAX98358 and MAX98371

MAX98358DEV#TQFN

View Detailed Evaluation Kit Information

The MAX98358 development board (DEV board) is a fully assembled and tested PCB that evaluates the MAX98358 PDM digital input Class D power amplifier. The MAX98358 evaluation system (EV SYS) operates from a single 2.5V to 5.5V DC power supply and is capable of delivering 3.2W into a 4Ω load. The device outputs can be connected directly to a speaker load for filterless applications. However, a filter can be added to ease evaluation.

The EV SYS includes the DEV board, PDM Generator board (PDM GEN) and the Maxim Audio Interface board (AUDINT board). The AUDINT board provides an easy-touse USB audio to I²S converter. The I²S data is fed into the PDM generator board that uses an FPGA to convert the I²S data stream into a PDM data stream. This allows for any computer to become a digital audio source that can be used to evaluate the device. The AUDINT board can also be used to power the part.

Applications

Cellular Phones
Notebook and Netbook Computers
Portable Media Players
Tablets

Features & Benefits

2.5V to 5.5V Single-Supply Operation
Only a Single External Component (VDD Capacitor) Required in Many Applications
PDM Digital Input
Five Selectable Gains (3dB, 6dB, 9dB, 12dB, and 15dB)
Audio Channel Select (Left, Right, Mono Mix)
Filterless Operation
Optional Class D Output Filters for Ease of Evaluation
Proven PCB Layout
Fully Assembled and Tested

Resources

MAX98358DEV#TQFN ODB Files - Design Files

ZIP

1.13M

MAX98358EVSYS#TQFN

View Detailed Evaluation Kit Information

Applications

Cellular Phones
Notebook and Netbook Computers
Portable Media Players
Tablets

Features & Benefits

2.5V to 5.5V Single-Supply Operation
Only a Single External Component (VDD Capacitor) Required in Many Applications
PDM Digital Input
Five Selectable Gains (3dB, 6dB, 9dB, 12dB, and 15dB)
Audio Channel Select (Left, Right, Mono Mix)
Filterless Operation
Optional Class D Output Filters for Ease of Evaluation
Proven PCB Layout
Fully Assembled and Tested

MAX98358EVSYS#WLP

View Detailed Evaluation Kit Information

Applications

Cellular Phones
Notebook and Netbook Computers
Portable Media Players
Tablets

Features & Benefits

2.5V to 5.5V Single-Supply Operation
Only a Single External Component (VDD Capacitor) Required in Many Applications
PDM Digital Input
Five Selectable Gains (3dB, 6dB, 9dB, 12dB, and 15dB)
Audio Channel Select (Left, Right, Mono Mix)
Filterless Operation
Optional Class D Output Filters for Ease of Evaluation
Proven PCB Layout
Fully Assembled and Tested

MAX98358DEV#WLP

View Detailed Evaluation Kit Information

Applications

Cellular Phones
Notebook and Netbook Computers
Portable Media Players
Tablets

Features & Benefits

2.5V to 5.5V Single-Supply Operation
Only a Single External Component (VDD Capacitor) Required in Many Applications
PDM Digital Input
Five Selectable Gains (3dB, 6dB, 9dB, 12dB, and 15dB)
Audio Channel Select (Left, Right, Mono Mix)
Filterless Operation
Optional Class D Output Filters for Ease of Evaluation
Proven PCB Layout
Fully Assembled and Tested

MAXAUDINT001

View Detailed Evaluation Kit Information

When used as a component in the MAX98357/MAX98358 dev kit or evsys NO driver is required.

The Maxim Audio Interface 1 (AUDINT1) board provides both an I²C and I²S interface to facilitate the evaluation of compatible Maxim Development (DEV) boards. Maxim DEV boards that are evaluated with the AUDINT1 interface board can require custom GUI software, which is available as a download from Maxim’s evkit-software web page.

The AUDINT1 board and a compatible DEV board are ordered together as an evaluation system (EV system). Ordering information for EV systems is located in the EV system data sheet.

Refer to the appropriate EV system data sheet for quick start and detailed operating instructions.

The AUDINT1 board is provided as part of selected Maxim evaluation systems (EV system) to evaluate Maxim parts only. The use of the AUDINT1 board as a development target is not supported. Refer to the MAXQ2000 evaluation kit data sheet for this purpose.

Applications

Battery-Powered and Portable Devices
Consumer Electronics
Data-Acquisition Systems and Data Loggers
Electrochemical and Optical Sensors
Gas and Chemical Sensors
Home Appliances
HVAC
Industrial Control
Medical Instrumentation
Security Sensors
Smart Transmitters
Thermostats/Humidity Sensors

Features & Benefits

USB Powered (+5V)
USB-to-I²C (USB CONTROL)
USB-to-I²S (USB AUDIO)
On-Board Master Clock Sources
On-Board LDOs (+1.2V, +1.8V, +3.3V)
Compatible with Standard FTDI VCP Drivers
Fully Assembled and Tested

Documentation & Resources

Data Sheets

MAX98358: PDM Input Class D Audio Power Amplifier Data Sheet (Rev. 6)
3/30/2020

PDF

1M

Reliability Data

MAX98358 Reliability Data
1/12/2023

PDF

41K

Technical Articles

Class D Amplifiers: Fundamentals of Operation and Recent Developments
1/31/2007

Product Recommendations

MAX98358 Companion Parts

Recommended Related Parts

MAX98357A, MAX98357B.

Design Resources

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.

Quality And Reliability

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MAX98358 Discussions

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Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.