The Knowles SPH1644LM4H-1 is a miniature SiSonic™ surface mount microphone. It is designed for applications requiring a small, high-performance audio sensor. The microphone utilizes Knowles' proven SiSonic™ MEMS technology, ensuring consistent performance and reliability. Its compact size and surface-mount design make it ideal for integration into space-constrained devices.

Applications:

• Mobile phones and smartphones
• Bluetooth headsets
• Wearable devices (smartwatches, fitness trackers)
• Tablets and laptops
• Hearing aids and assistive listening devices
• IoT (Internet of Things) devices with voice control
• Voice recorders

Features:

• Small Size: Miniature footprint for space-constrained applications.
• Low Power Consumption: Optimizes battery life in portable devices.
• High SNR (Signal-to-Noise Ratio): Delivers clear and crisp audio capture.
• Omnidirectional Sensitivity: Picks up sound equally from all directions.
• Surface Mount Design: Enables automated assembly and efficient manufacturing.
• RF Immunity: Resistant to radio frequency interference, ensuring stable performance in wireless environments.
• Digital Output: Offers a digital interface for simplified integration with digital signal processors.

Benefits:

• Improved Audio Quality: High SNR ensures clear voice capture and accurate sound reproduction.
• Extended Battery Life: Low power consumption allows for longer usage times in battery-powered devices.
• Design Flexibility: Small size and surface mount design enable integration into a wide range of products.
• Reliable Performance: Knowles' SiSonic™ MEMS technology guarantees consistent and dependable operation.
• Reduced Manufacturing Costs: Surface mount design facilitates automated assembly and reduces labor costs.
• Enhanced User Experience: Clear audio capture improves voice communication and voice recognition accuracy.

Additional Details:

The SPH1644LM4H-1 typically operates with a supply voltage in the range of 1.6 to 3.6V. It features a digital PDM (Pulse Density Modulation) output, which is compatible with many audio codecs and digital signal processors. The microphone's sensitivity is precisely calibrated during manufacturing to ensure consistent performance across different units. This microphone is lead-free and RoHS compliant, meeting environmental regulations.