Development of World’s Smallest Commercially available MEMS Microphone by TDK
TDK-EPC one of the group company of TDK, made an announcement on development world’s smallest MEMS microphones featuring a digital interface. The newly developed EPCOS T4030 bears a dimension of 3.25 x 2.25 x 1.1 mm making the new MEMS microphone about 60% smaller than available alternative products in the market. The small form factor results in a more compact design for mobile phones and other consumer electronic products such as MP3 players and digital cameras.
The EPCOS T4030 has a sensitivity of -26 dB FS (full scale) and a signal-to-noise ratio of 60 dBA. The distortion factor for EPCOS T4030 remains under 1 percent even at a sound level of 100 dB. The EPCOS T4030 is mostly insensitive to electromagnetic interface due to a digital PDM (pulse density modulation) output. In EPCOS T4030, two channels can be transmitted using only one signal line, resulting in simpler implementation of stereo application than in analog technology. The EPCOS T4030 has supply voltage range of between 1.64 and 2.86 V, plus a power consumption of 650 uA, and 10 uA in standby operation. The EPCOS T4030 is manufactured based on CSMP (chip sized MEMS package) technology, developed for SAW filters. The main applications for EPCOS T4030 are mobile phones, hand-free phones, MP3 players, laptop PCs, video and VoIP systems, telephone conference systems as well as microphone arrays.