MAX98357 I2S Amplifier Module

The MAX98357 I2S Class D amplifier module is a digital amplifier that is designed to work with microcontrollers with I2S audio outputs, such as the ESP32. It can be used in various projects, including IoT nodes, smart home devices, and Bluetooth audio players.

This module supports a power supply range of 3.3V to 5V and is capable of outputting over 2.5W of power when paired with a 4 Ohm speaker and driven by a 5V supply. It has the ability to switch between different modes (off, left channel, right channel, and mixed) by changing the resistance on the SD port, with mixed mode as the default setting.

In addition to its small size, this I2S amplifier has stamp holes for easy integration into a PCB or breadboard and PH2.0 and stamp holes for connecting speakers. Its flexible design makes it convenient to use in a variety of applications.

• MAX98357 I2S digital Class D amplifier, power >2.5W
• 3.3V~5V voltage power supply
• Switchable sound channel
• Adjustable gain
• Stamp holes design, support SMT and DIP
• Two ways to connect a speaker: PH2.0 and stamp holes

• Chip Audio-relevant Parameters
           (VDD = 5V, VGND = 0V, GAIN_SLOT = VDD. BCLK = 3.072MHz, LRCLK = 48kHz, speaker loads (ZSPK) connected between OUTP and OUTN, ZSPK = J, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25NC.) (Note 2)
• Sample Rate: 8kHz~96kHz
• THD:
           0.02% (f = 1kHz, POUT = 1W, TA = +25NC, ZSPK = 4I + 33FH, TQFN)
           0.013% (f = 1kHz, POUT = 0.5W, TA = +25NC, ZSPK = 8I + 68FH)
• Dynamic Range: 105DB (A-weighted, VRMS = 2.54V, 24- or 32-bit data)
• Output Noise: 25FVRMS (A-weighted, 24- or 32-bit data (Note 4))
• Gain (relative to the reference level of 2.1dBV):
           GAIN_SLOT = GND through 100kohm: Min 14.4dB, Typical 15dB, Max 15.6dB
           GAIN_SLOT = GND: Min 11.4dB, Typical 12dB, Max 12.6dB
           GAIN_SLOT = unconnected: Min 8.4dB, Typical 9dB, Max 9.6dB
           GAIN_SLOT = VDD: Min 5.4dB, Typical 6dB, Max 6.6dB
           GAIN_SLOT = VDD through 100kohm: Min 2.4dB, Typical 3dB, Max 3.6dB
• Efficiency: 92% (ZSPK = 8I + 68FH, THD+N = 10%, f = 1kHz, gain = 12dB)
• DAC Gain Error: 1%
• Frequency Response: +-0.2dB
• Class D Switching Frequency: 330kHz
• Spread Spectrum Bandwidth: +-12.5kHz

• Product wiki
• STP 3D Model
• 2D CAD Dimension
• 2D PDF Dimension
• Schematics
• MAX98357A Datasheet

Connection Diagram