Parts MAX98357AETE+T

MAX98357AETE+T

Name: MAX98357AETE+T
Brand: Analog Devices / Maxim Integrated

Analog Devices / Maxim Integrated

Audio Amplifiers Digital Input Class D Amplifier

10,190 in stock

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Overview

MAX98357A is a mono digital-input Class D audio amplifier from Analog Devices (Maxim). It accepts a digital audio stream (I2S/left-justified style) and produces a high-efficiency Class D speaker output, letting a microcontroller or SoC drive a speaker with minimal external analog parts. The device is intended for space-constrained, battery-powered, or cost-sensitive audio applications.

Why Choose This Part

The MAX98357A eliminates the need for an external DAC and analog amplifier by taking a digital audio stream (I2S/left-justified) and producing a Class D speaker output, reducing component count and PCB area. Its Class D operation provides high power efficiency for battery-operated designs and typically does not require large output filters or heatsinks. Integration of the digital-to-PWM and power stage simplifies system design and EMI management when used according to the datasheet recommendations.

Applications

Portable speakers and smart speakers

Drive a single small speaker directly from an MCU or SoC using its I2S audio output for compact, efficient audio playback.

IoT devices and appliances

Add voice prompts, alerts, or simple music playback to battery-powered sensors, appliances, and smart-home devices where power efficiency matters.

Wearables and handheld devices

Provide short audio cues and notifications with minimal PCB area and few external components.

Embedded products using Raspberry Pi/ESP32/STM32

Use the amplifier with common development platforms that expose I2S audio to add a speaker output without a separate DAC or analog amplifier.

Getting Started

Read the MAX98357A datasheet and reference schematic for proper I2S wiring, clocking, and supply decoupling. Connect the device to an MCU or single-board computer that provides an I2S interface (examples: ESP32, STM32, Raspberry Pi) and use that platform's I2S/audio libraries to stream audio. Verify speaker impedance and route supply decoupling and ground properly; follow the datasheet for layout and filtering guidance.