MAX9814 Module Electret Microphone Amplifier Board

@ MODERN HALLROAD

The MAX9814 module is a microphone amplifier with automatic gain control (AGC). Electret Microphone Amplifier MAX9814 is a popular choice for applications where the loudness of the audio signal is not predictable, such as voice recognition, noise cancellation, and audio recording.

 600.00

In stock

The MAX9814 module is a microphone amplifier with automatic gain control (AGC). It is a popular choice for applications where the loudness of the audio signal is not predictable, such as voice recognition, noise cancellation, and audio recording.

The AGC circuit automatically adjusts the gain of the amplifier to keep the output signal at a constant level, regardless of the input signal level. This helps to prevent clipping and distortion, even when the input signal level is very high or very low.

This MAX9814 Electret Microphone Amplifier has a low noise floor, which means that it can accurately amplify even very quiet signals. This is important for applications where the audio signal is weak, such as voice recognition.
The MAX9814 microphone amplifier has a 2.7V to 5.5V operating voltage range. The input signal range is -40dB to +20dB. This means that the input signal voltage can vary from 0.05V to 2.45V. The MAX9814 has a built-in low-noise microphone bias circuit that provides a DC bias voltage of 2V to the microphone. This bias voltage is necessary to power the microphone and to ensure that the output signal is properly amplified.

The MAX9814 also has a programmable attack/release time. The attack time is the time it takes for the AGC circuit to reach its full gain after the input signal level changes. The release time is the time it takes for the AGC circuit to reduce its gain after the input signal level returns to its normal level. The attack and release times can be adjusted to improve the performance of the AGC circuit in different applications.

The MAX9814 microphone amplifier works on the principle of operational amplifier (op-amp). The op-amp is a type of electronic circuit that can be used to amplify signals. The MAX9814 has a built-in op-amp that amplifies the input signal from the microphone. The amplified signal is then output from the MAX9814.

Features : –

If you are looking for a versatile and powerful microphone amplifier with automatic gain control, the MAX9814 is a great option. It is a reliable and easy-to-use module that can be used in a wide range of applications.

The MAX9814 Electret Microphone Amplifier has a number of benefits, including:

  • Automatic gain control (AGC): The AGC circuit automatically adjusts the gain of the amplifier to keep the output signal at a constant level, regardless of the input signal level. This helps to prevent clipping and distortion, even when the input signal level is very high or very low.
  • Low noise: The MAX9814 has a low noise floor, which means that it can accurately amplify even very quiet signals. This is important for applications where the audio signal is weak, such as voice recognition.
  • Wide frequency response: The MAX9814 has a wide frequency response, which means that it can amplify audio signals over a wide range of frequencies. This is important for applications where the audio signal contains a wide range of frequencies, such as music.
  • Selectable gain: The MAX9814 offers three selectable gains of 40dB, 50dB, or 60dB. This allows you to adjust the gain of the amplifier to match the level of the input signal.
  • Programmable attack/release time: The MAX9814 has a programmable attack/release time, which allows you to adjust how quickly the AGC circuit reacts to changes in the input signal level.

Here are some of the specific benefits of using the MAX9814 Electret Microphone Amplifier in different applications:

  • Voice recognition: The AGC circuit helps to prevent clipping and distortion, even when the user is speaking loudly or quietly. This ensures that the voice recognition software can accurately recognize the user’s voice.
  • Noise cancellation: The low noise floor of the MAX9814 helps to reduce the amount of background noise that is amplified. This can improve the performance of noise cancellation algorithms.
  • Audio recording: The wide frequency response of the MAX9814 ensures that all of the frequencies in the audio signal are amplified accurately. This results in high-quality audio recordings.
  • Speech synthesis: The selectable gain of the MAX9814 allows you to adjust the volume of the synthesized speech. This can be useful for applications where you need to control the volume of the speech, such as in a car navigation system.

MAX9814 Module Specifications : –

Here are the specifications of the MAX9814 electret microphone amplifier:

  • Operating voltage: 2.7V to 5.5V
  • Input signal range: -40dB to +20dB
  • Gain: 40dB, 50dB, or 60dB
  • AGC threshold: Adjustable
  • Attack/release time: Adjustable
  • Output voltage: 0 to 2.45V
  • Frequency response: 20Hz to 20kHz
  • Noise: 30nV/√Hz
  • Power consumption: 10mA typical

Pin Descriptions : –

The MAX9814 module has 5 pins:

  • VCC: This pin is the power supply for the module. The operating voltage range is 2.7V to 5.5V.
  • GND: This pin is the ground for the module.
  • OUT: This pin is the output of the module. The output voltage is 0 to 2.45V.
  • GAIN: This pin is used to select the gain of the module. The gain can be set to 40dB, 50dB, or 60dB.
  • AR: This pin is used to adjust the attack/release time of the AGC circuit. The attack/release time can be adjusted to improve the performance of the AGC circuit in different applications.
MAX9814 Module Applications : –

The MAX9814 Electret Microphone Amplifier is a versatile and powerful microphone amplifier that is well-suited for a wide range of applications. Here are some of the most common applications:

  • Voice recognition: The AGC circuit helps to prevent clipping and distortion, even when the user is speaking loudly or quietly. This ensures that the voice recognition software can accurately recognize the user’s voice.
  • Noise cancellation: The low noise floor of the MAX9814 helps to reduce the amount of background noise that is amplified. This can improve the performance of noise cancellation algorithms.
  • Audio recording: The wide frequency response of the MAX9814 ensures that all of the frequencies in the audio signal are amplified accurately. This results in high-quality audio recordings.
  • Speech synthesis: The selectable gain of the MAX9814 allows you to adjust the volume of the synthesized speech. This can be useful for applications where you need to control the volume of the speech, such as in a car navigation system.
  • Home automation: The MAX9814 can be used to detect sounds, such as a doorbell ringing or a smoke alarm going off. This can be used to trigger home automation events, such as turning on lights or opening a door.
  • Security systems: The MAX9814 can be used to detect break-ins or other suspicious activity. This can be used to trigger security alarms or to record video footage.
  • Medical diagnostics: The MAX9814 can be used to amplify sounds from the human body, such as heart sounds or lung sounds. This can be used to diagnose medical conditions.

These are just a few of the many applications for the MAX9814 Electret Microphone Amplifier. It is a versatile and powerful amplifier that can be used in a wide range of applications.

Package : –

1x MAX9814 Module Electret Microphone Amplifier Board

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  • Store Name: MODERN HALLROAD
  • Vendor: MODERN HALLROAD
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  • 5.00 5.00 rating from 1 review

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