SPH0641LM4H-1
Overview
The SPH0641LM4H-1 is a high-performance, bottom-port MEMS microphone featuring a Pulse Density Modulation (PDM) digital output. It is designed for low-power applications, offering multiple performance modes including a sleep mode with only 25 uA current consumption and a high Signal-to-Noise Ratio (SNR) of 64.3dB. The device is housed in a compact 3.50mm x 2.65mm x 0.98mm LGA package and supports a wide supply voltage range from 1.62V to 3.6V.
Why Choose This Part
This microphone offers exceptional flexibility with its multiple performance modes, allowing engineers to trade off power consumption for acoustic performance. Its flat frequency response from 100 Hz to 10 kHz ensures accurate sound reproduction, while the digital PDM interface simplifies routing in noise-sensitive PCB layouts by eliminating the need for analog pre-amplifiers.
Applications
Key Specifications
Getting Started
To evaluate this microphone, interface the PDM DATA and CLK lines to a microcontroller or DSP with a PDM peripheral, such as an STM32 or nRF52 series SoC. Ensure the bottom-port acoustic hole is correctly aligned with the enclosure opening and follow the specified SMD reflow profiles to avoid damaging the MEMS membrane. For rapid prototyping, look for breakout boards from vendors like Adafruit or SparkFun that utilize similar Knowles SPH-series MEMS sensors.
Also Consider
STMicroelectronics
- A popular alternative PDM MEMS microphone with similar top-port configuration and robust performance in industrial temperatures.
