An analog-to-digital converter (ADC) converts an analog voltage input into a digital output represented by a number of bits determined by the ADC resolution. Signals that are not inherently in voltage form, such as current, must first be converted into a voltage before they can be digitized. The ADC output must then be scaled according to its bit width so that the processed value can be correctly interpreted by the control system.
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Features and Benefits
- Auto Offset Computation:
- Automatically computes the ADC offset during startup
- Temporarily disables PWM signals
- Triggers the ADC 8,192 times to capture samples
- Computes the average offset from the collected samples
- ADC Data Scaling :
- Converts raw ADC readings into per-unit values.
- Subtracts the computed offset from the raw ADC data.
- Applies a scaling factor so that the rated current corresponds to 65,536
- Over-Current Fault Detection:
- Detects over-current conditions after the phase current is computed
- Can be used to immediately stop the motor to protect the system
Licensing Options
Encrypted RTL free with any Libero license
Documentation
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| ADC Scaling User Guide | Download |