ADI announces first I2S digital MEMS microphone
The first high performance MEMS microphone with an Inter-IC Sound (I2S) digital output has been unveiled by Analog Devices. The ADMP441 iMEMS microphone features a frequency response from 100Hz to 15kHz, high signal to noise ration (snr) of 61dBA and high power supply rejection ratio (psrr) of 80dBFS.
The new device uses patented ADI MEMS and audio signal processing technologies and is available in a 4.72 × 3.76 × 1mm surface mount package. It is reflow solder compatible with no sensitivity degradation.
According to Kieran Harney, product line manager, MEMS/Sensors Technology Group, Analog Devices, the device addresses the issue of audio designers having to design in additional signal processing in order to convert microphone output signals into standard I2S formats for non-mobile phone use. "This increased both system cost and design complexity," he said. "The innovative ADMP441 with industry standard I2S output offers plug and play use in a small footprint, simplifying audio system design while reducing overall signal chain cost and complexity."
The microphone is now sampling with volume production scheduled for June 2011.
