The WM7210 and WM7220 digital silicon micro-electro-mechanical-systems (MEMS) microphones combine low power and low total harmonic distortion in low-profile packages. Based on CMOS/MEMS membrane technology, the mics deliver high reliability and can withstand the high temperatures needed for automated flow solder assembly. The WM7210 and WM7220 integrate an ADC that outputs a single-bit pulse density modulated (PDM) format audio data stream, while the microphone output can be defined for left or right configuration allowing for applications requiring stereo operation. The WM7210 is available in a 4 mm x 3 mm x 1 mm package while the WM7220 comes in a 4.72 mm x 3.76 mm x 1.25 mm package. Price for either is $1.83 each/1,000. WOLFSON MICROELECTRONICS PLC, San Diego, CA. (858) 676-5090.