PDM Electrical Specification

nRF54LM20A | nRF54LM20B Datasheet

Symbol Description Min. Typ. Max. Units
fPDM,CLK,64

PDM clock speed. PDMCLKCTRL = Default (Setting needed for 16 kHz sample frequency @ RATIO = Ratio64)

1.032 MHz
fPDM,CLK,80

PDM clock speed. PDMCLKCTRL = 1280K (Setting needed for 16 kHz sample frequency @ RATIO = Ratio80)

1.280 MHz
tPDM,JITTER

Jitter in PDM clock output

ns
TdPDM,CLK

PDM clock duty cycle

40 50 60 %
tPDM,DATA

Decimation filter delay

5 ms
tPDM,s

Data setup time

35 ns
tPDM,h

Data hold time

0 ns
GPDM,default

Default (reset) absolute gain of the PDM module

0 dB
Figure 7. PDM timing diagram
PDM timing diagram