Maxim Integrated's MAX9812LEXT+T Microphone Amplifier

The MAX9812LEXT+T from Maxim Integrated is a high-quality, low-noise, single/dual-input microphone amplifier with a built-in bias voltage and an Automatic Gain Control (AGC) feature. Designed for portable consumer devices, this compact and efficient component is ideal for applications that require a small footprint and minimal power consumption without compromising on audio performance.

Key Features

• Low Noise Performance: The MAX9812LEXT+T boasts an exceptionally low input-referred noise density of just 30nV/√Hz, which ensures crystal-clear audio capture, making it perfect for high-quality sound recording in various environments.
• Integrated Bias Voltage: A 2V bias voltage is provided, which can be used to power an electret microphone directly, simplifying the design and reducing external component requirements.
• Automatic Gain Control: The AGC functionality automatically adjusts the gain to accommodate a wide range of input levels, ensuring consistent audio output without manual intervention.
• Flexible Gain Settings: With selectable gain settings of 40dB, 50dB, and 60dB, designers can easily tailor the amplifier's performance to match specific application needs.
• Low Power Consumption: Operating on a supply voltage range from 2.7V to 3.6V, the device is optimized for battery-powered devices, offering a quiescent current of only 145µA.

Applications

The MAX9812LEXT+T is suited for a wide range of applications requiring high-quality audio amplification, such as:

• Smartphones and tablets
• Bluetooth headsets
• Portable media players
• Notebook computers
• Security and surveillance systems
• Other consumer electronics with audio recording or voice recognition features

Technical Specifications

With its tiny 6-pin Laminated Chip Carrier (LCC) package, the MAX9812LEXT+T is designed to occupy minimal space on a PCB. The device also features an extended temperature range from -40°C to +85°C, accommodating a variety of operating conditions.

In summary, Maxim Integrated's MAX9812LEXT+T microphone amplifier is an excellent choice for designers looking to enhance audio performance in their products while maintaining efficiency and ease of integration.