9.1 Duty Cycle Accuracy

1. The board ran continuously with a fixed duty cycle set and the duty cycle recorded continuously with the oscilloscope and standard deviation calculated (see Figure 24).
Figure 24. Duty Cycle Accuracy

The result was a very accurate duty cycle with a standard deviation of 848µ% (0.000848%).

2. Different clock devices (TLC555) from a different production batch were tested on the same board.

The result was a very accurate duty cycle with a standard deviation of less than 0.5%.

3. Temperature test: –40°C to 110°C. The board ran continuously with a fixed duty cycle set and the duty cycle continuously recorded with an oscilloscope and standard deviation calculated.

The result was a very accurate duty cycle with a standard deviation of less than 0.5%.