The SPK0838HT4H-B-7 is a silicon microphone manufactured by Knowles. It's designed for high-performance audio capture in a variety of applications, characterized by its small size, low power consumption, and excellent acoustic performance.

Applications

• Mobile phones
• Tablets
• Wearable devices (smartwatches, fitness trackers)
• Bluetooth headsets
• Hearing aids
• Voice-controlled devices (smart speakers, smart home devices)

Features

• High Signal-to-Noise Ratio (SNR)
• Low Total Harmonic Distortion (THD)
• Small Package Size
• Low Power Consumption
• Omnidirectional Polar Pattern
• High Acoustic Overload Point (AOP)
• Digital Output (Pulse Density Modulation - PDM)
• RoHS Compliant

Benefits

• Clear and natural sound reproduction
• Improved voice recognition accuracy
• Extended battery life in portable devices
• Easy integration into compact designs
• Robust performance in noisy environments
• Immunity to RF interference

Technical Specifications

The SPK0838HT4H-B-7 features a high SNR, typically around 64 dB, which ensures a clean audio signal. The THD is very low, contributing to accurate sound reproduction. The microphone has an omnidirectional polar pattern, meaning it picks up sound equally from all directions. The AOP is high, allowing it to handle loud sounds without distortion. The digital PDM output simplifies interfacing with digital signal processors (DSPs) and microcontrollers. It operates on a supply voltage of typically 1.8V or 3.3V. The exact dimensions of the package are very small, usually around 3mm x 4mm, making it ideal for miniature devices. Sensitivity is typically around -26 dBFS.

This silicon microphone provides excellent audio performance in a small and power-efficient package. Its high SNR and low THD ensure clear and natural sound, while its omnidirectional polar pattern makes it suitable for a wide range of applications. The digital PDM output simplifies integration with digital systems.