Product description: Audio amplifier module - MAX98357 - DFRobot DFR0954
Audio amplifier module - MAX98357 - DFRobot DFR0954 perfectly works with microcontrollers with I2S audio outputs, such as ESP32 and can be used, for example, with IoT applications, Smart Home devices or Bluetooth audio players. The module is supplied with the voltage in the range from 3.3 V to 5 V and can generate more than 2.5 W of power . It is also possible to configure the sound reproduction method by changing the resistance on the SD lead.
Thanks to its small size, the module can be used in the construction of a small audio player.
The product is compatible with Arduino !
The manufacturer has prepared a detailed user guide that contains useful information to help you get started with the module.
Audio amplifier module - MAX98357 - DFRobot DFR0954.
Technical specification of the audio amplifier module
- Built-in chip: MAX98357A
- Supply voltage range: 3.3 V to 5 V
- Number of output channels: 1
- Selecting the output channel: off, left, right or stereo - left and right
- Power output: 8 Ω 1.8 W / 4 Ω 2.5 W (into 12 db)
- Communication interface: I2S interface
- Sampling frequency: 8kHz to 96kHz
- Dynamic range: 105 DB (VRMS = 2.54 V, 24 or 32 bit data)
- Noise Output: 25 FVRMS (24 or 32 bit data)
- Efficiency: 92%
- DAC Gain Accuracy: 1%
- Frequency response: ± 0.2 dB
- Class D switching frequency: 330 kHz
- Spectral bandwidth: ± 12.5 kHz
- Adjustable Gain:
- The gain is 15 dB when a 100 kΩ resistor is connected between GAIN and GND
- The gain is 12 dB when GAIN is directly connected to GND
- The gain is 9 dB when nothing is connected to GAIN
- The gain is 6 dB when GAIN is directly connected to VCC
- The gain is 3 dB when a 100 kΩ resistor is connected between the gain and VCC
- Leads: solder pads to which the goldpin connectors included in the kit should be soldered
- Module dimensions: 18 × 18 mm
Suggested module use
- Bluetooth audio player
- IoT application audio player
- Voice interaction in Smart Home devices
Sample connection diagram.
Pinout description
| PIN | DESCRIPTION |
|---|---|
| SPK- | Speaker output - negative. |
| VCC | Supply voltage from 3.3 V to 5 V. |
| GND | The mass of the system. |
| NC | Pin is not connected. |
| SD | Disabling and selecting the output channel (off, left, right or stereo - left and right). |
| GAIN | Gain Control - 9 dB by default. |
| SPK + | Loudspeaker output - positive. |
| DIN | Data in - data input. |
| BLCK | Bit Clock - informs the amplifier when to read data from the data pin. |
| LRC | Frame Clock - informs the amplifier about the input channel (left / right or stereo). |
Kit contents.
Kit contents
- Audio amplifier module - MAX98357
- 1x6 goldpin strip - 2.54 mm raster - 2 pieces
Our offer also includes other sound modules - check it out!
