ETAS ES930.1 - Page 57

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
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Duty cycle
Active time
Active time Inactive time+
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Worst-case duty cycle
Active time +
Active time Inactive time+
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