Data Sheet

ISM14585-L35 Specification
DOC-DS-14585-201807-3.0
Confidential Inventek Systems
Page 85
Figure 42 PDM formats
Figure 43 PDM input transfer functions
It should be noted that the audio quality degrades when the oversampling ratio is less
than 64. For an 8 kHz sample rate the minimum recommended PDM clock rate is 64 x 8
kHz = 512 kHz.