Gain Compensation

The comparator itself shows a significant propagation delay, which is added to the result. It introduces an additional, temperature dependent gain error. The absolute maximum of this error is in the range of 1 % of the maximum measured value. PSØ2 is capable of measuring the comparator's propagation delay and therefore can compensate for the gain error.

This compensation takes 1 measurement (= 1 cycle time) per half-bridge. The measurement is done at the end of a normal measurement. For noise reduction the correction data can be averaged.

Using the PSØ2 gain compensation the gain drift over temperature is only about 1 ppm/K (0.0001 %/K) of full scale. Even for calibrated scales it is not necessary to do further compensation actions.

• Features
• Schematic Diagram
• Connecting the Bridge
• Capacitor Choice
• Comparator
• Oscillator
• Cycle Time
• Averaging/Resolution
• Rdson Compensation
• Gain Compensation
• Temperature Measurment
• Capacitor Measurement