An analog to digital converter (ADC) converts a voltage signal as input to a digital signal in a number of bits that depends on ADC resolution. Signals that are not available in voltage form, such as currents, are converted to a voltage signal before conversion to digital data. The digital signal output of the ADC that is relative to its bit width must be scaled to a value that can be properly interpreted by the system that processes the signal.
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Features and Benefits
- Auto Offset Computation:
- Automaticlly computes ADC offset at startup
- Disables PWM signals temporarily
- Triggers ADC 8192 times to capture samples
- Computes the average offset from the collected samples
- Automaticlly computes ADC offset at startup
- ADC Data Scaling :
- Converts raw ADC readings to per-unit values
- Subtracts computed offset from raw ADC data
- Applies a scaling factor so that the rated current corresponds to 65536
- Converts raw ADC readings to per-unit values
- Over-Current Fault Detection:
- Detects over-current conditions after phase current is computed
- Can be used to immediately stop motors for protection
- Detects over-current conditions after phase current is computed
Documentation
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| ADC Scaling User Guide | Download |