By Knowles 702
Knowles' SPH0644LM4H-1 is a miniature, high-performance, low-power, bottom port silicon digital microphone with single bit PDM output. The SPH0644LM4H-1 consists of an acoustic sensor, a low noise input buffer, and a sigma-delta modulator. It is made for portable electronic devices where excellent wideband audio performance and RF immunity are required.