This I2S digital amplifier based on the MAX98357 I2S Class D amplifier module works great with microcontrollers with I2S audio outputs like ESP32 and can be applied to projects like IoT nodes, smart home devices, Bluetooth audio players, and so on.

• The module supports a 3.3V-5V power supply. And it can output over 2.5W of power when driven by 5V and a 4Ω speaker. Besides, it allows users to set different modes (off, left channel, right channel, and mixed) by changing the resistance on the SD port. The product defaults to mixed mode.
• Featuring a small size, this I2S amplifier comes with stamp holes that enable it to be directly plugged into or mounted on a PCB and breadboard. Also, it is designed with PH2.0 and stamp holes for connecting speakers, flexible, and convenient to use.

Features:

• 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
• APPLICATIONS
• Bluetooth Audio Player
• IoT Node Audio Player
• Smart Home Voice Interaction
• Robotic Device Audio Player

Specifications:

• Module Parameters
  
• MCU: MAX98357A
• Operating Voltage: DC 3.3V~5V
• Output Power: 8Ω 1.8W / 4Ω 2.5W (at 12db)
• Output Channel: single channel
• Communication Interface: I2S interface
• Operating Temperature: -40℃ - ＋80℃
• Storage Temperature: -40℃ - ＋80℃
• Dimension (Without Packaging): 18mm × 18mm/ 0.059 × 0.059
• 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 100kΩ: 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 100kΩ: 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

Documentation:

• Product wiki
• 2D PDF Dimension
• Schematics
• MAX98357A Datasheet

Package Includes:

• 1 x MAX98357 I2S Amplifier Module