SBAA395B May   2022  – December 2023 PCMD3140 , TLV320ADC3120 , TLV320ADC3140 , TLV320ADC5120 , TLV320ADC5140 , TLV320ADC6120 , TLV320ADC6140

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Near-Field and Far-Field
    1. 1.1 Definition
  5. 2Constituents in the Far-Field Application
  6. 3Understanding of Digital and Analog Microphone
    1. 3.1 Digital PDM Microphone System
    2. 3.2 Analog Microphone with ADC System
  7. 4Quantization Noise Density for Each Microphone
  8. 5Dynamic Range in Far-Field
    1. 5.1 DR
    2. 5.2 DR in Microphone
    3. 5.3 DRE in the TLV320ADC5140/PCM5140-Q1
    4. 5.4 DRE Performance in TLV320ADC5140/PCM5140-Q1
  9. 6Design of Any Microphone with the TLV320ADC51x0/PCM51x0-Q1
    1. 6.1 Structure of the TLV320ADC51x0/PCM51x0-Q1
      1. 6.1.1 Design Example 1: Only Analog Microphone System
      2. 6.1.2 Design Example 2: Only Digital Microphone System
      3. 6.1.3 Design Example 3: Analog and Digital Microphone Combination System
  10. 7Conclusion
  11. 8Revision History

6.1.2 Design Example 2: Only Digital Microphone System

The digital PDM microphone can be formed up to eight multi-channels. In this case, the PDM output from the microphone goes through PDM interface to be sent to the decimation filter.

GUID-07D8407E-DD57-48F8-B834-859E38DD171C-low.gifFigure 6-3 Digital PDM Microphones System Block Diagram