Specifications:

• Output Power: 3.2W at 10% THD with 4Ω impedance and 5V supply
• Operating Voltage: 2.7V to 5.5V
• PSRR (Power Supply Rejection Ratio): 77 dB at 1 kHz
• Selectable Gain Values: 3dB, 6dB, 9dB, 12dB, 15dB
• Audio Input: I2S digital audio input (supports 3.3V and 5V levels)
• Output Behavior: Stereo signals (L + R) mixed by default; can be changed to mono by using a resistor.

Package:

• 1 x Audio Amplifier Module
• 1 x Pin Header
• 1 x 2-Pin Plug
• (Speaker, Raspberry Pi, T-Cobbler, leads, and breadboard not included)

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Description:

The MAX98357A I2S 3W Class D Amplifier Breakout is a compact yet powerful audio amplifier board designed for use with Raspberry Pi and other microcontroller-based projects. It converts digital audio signals via the I2S interface to analog and amplifies them, allowing for direct connection to speakers. The module operates within a voltage range of 2.7V to 5.5V and offers selectable gain values to suit various audio requirements. With an output power of 3.2W at 5V and a low power supply rejection ratio (PSRR), it is particularly well-suited for mobile and battery-powered applications.

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FAQ:

1. What is the maximum output power this amplifier can provide?
The amplifier delivers 3.2W at 10% THD with 4Ω impedance speakers and a 5V power supply.

2. What is the operating voltage range for this module?
It operates with a voltage range of 2.7V to 5.5V.

3. Can I adjust the amplifier’s gain?
Yes, the gain can be selected in the following values: 3dB, 6dB, 9dB, 12dB, and 15dB.

4. Does this module support both 3.3V and 5V audio input?
Yes, the I2S input supports both 3.3V and 5V levels.

5. What is the default output behavior of the module?
By default, stereo signals (L + R) are mixed to form a single output signal. This can be changed to mono output by using a resistor.

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