ETAS ES930.1, User Manual, Page: 57 / 139

ETAS Digital Output Channels ("DO" Connection)
ES930.1 - User Guide 57
9.2.2 PWM Output Accuracy
If the typical output characteristics (see Fig. 9 - 2 on page 56) are taken into
account, the following accuracies can be derived for the PWM output signals.
Tab. 9 - 2 PWM Output Accuracy
The maximum relative error is determined from:
For this purpose, the absolute maximum deviation can be set to

= 200 ns.
Frequency Minimum scan
ratio
Maximum scan
ratio
Maximum relative
error
1 Hz - 50 Hz 0.01% 99.99% 10%
50 Hz - 500 Hz 0.10% 99.9% 10%
500 Hz - 5 kHz 1% 99% 10%
5 kHz - 60 kHz 10% 90% 10%
Maximum relative error
Worst-case duty cycle - duty cycle
Duty cycle
----------------------------------------------------------------------------------- =
Duty cycle
Active time
Active time Inactive time +
------------------------------------------------------------------ =
Worst-case duty cycle
Active time  +
Active time Inactive time +
------------------------------------------------------------------ =