I have an MCC128 hat, and it works well to sample data @ 1kHz from an analog sensor connected to the data acquisition board via a differential analog input. A continuous scan over many hours (5+ hours) works flawlessly for my application.
To characterize the sensor noise properties, I typically acquire data over several hours and apply statistical techniques. As I am interested in the noise properties, I also configure the MCC128 to +/-1V to maximize the available resolution.
I suspect the reason why my calculations do not match the sensor's datasheet for certain timescales is due to the 16-bit A/D converter.
Looking for options to test out this hypothesis. There are several other MCC hats for the rpi with 24-bit A/D converters, but those seem tailored to specific sensors and/or do not support the 1kHz sample rates of interest.
Is there a drop-in, pin-compatible 24-bit A/D converter that can be installed in the MCC 128? Are there firmware options to change the voltage range to something tighter than +/-1V or is that a limitation of hardware on the hat?
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_jm
Hello.
I have an MCC128 hat, and it works well to sample data @ 1kHz from an analog sensor connected to the data acquisition board via a differential analog input. A continuous scan over many hours (5+ hours) works flawlessly for my application.
To characterize the sensor noise properties, I typically acquire data over several hours and apply statistical techniques. As I am interested in the noise properties, I also configure the MCC128 to +/-1V to maximize the available resolution.
I suspect the reason why my calculations do not match the sensor's datasheet for certain timescales is due to the 16-bit A/D converter.
Looking for options to test out this hypothesis. There are several other MCC hats for the rpi with 24-bit A/D converters, but those seem tailored to specific sensors and/or do not support the 1kHz sample rates of interest.
Is there a drop-in, pin-compatible 24-bit A/D converter that can be installed in the MCC 128? Are there firmware options to change the voltage range to something tighter than +/-1V or is that a limitation of hardware on the hat?
Any other thoughts?
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