Transcription of MICROPHONE SPECIFICATIONS EXPLAINED - TDK
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MICROPHONE SPECIFICATIONS EXPLAINED - TDK
Application Note AN 1112 MICROPHONE SPECIFICATIONS EXPLAINED InvenSense reserves the right to change the detail SPECIFICATIONS as may be required to permit improvements in the design of its products. InvenSense Inc. 1745 Technology Drive, San Jose, CA 95110 +1(408) 988 7339 Document Number: AN 1112 Revision: Release Date: 06/15/2016 DB FS INTRODUCTION A MEMS MICROPHONE IC is unique among InvenSense, Inc., products in that its input is an acoustic pressure wave. For this reason, some SPECIFICATIONS included in the data sheets for these parts may not be familiar, or familiar SPECIFICATIONS may be applied in unfamiliar ways. This application note explains the SPECIFICATIONS and terms found in MEMS MICROPHONE data sheets so that the MICROPHONE can be appropriately designed into a system.
wave is defined as a signal whose peak just touches the full‐scale code of the digital word (see Figure 1). This measurement convention means that signals with a different crest factor may have an rms level higher than 0 dB FS. For example, a full‐scale square wave has
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