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Hello there,
I have a project that required a bidirectional ADC which can take negative and positive voltages.
What is the best solution to do so using PSoC 5LP? I have MAXREFDES5#, and I am thinking about using it, but I know the design will be complex. If these is a suggestion or an example code that would help me to build my design faster I would be grateful.
Thanks!
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You need a resistor network to shift the expected input voltage into the range (roughly) GND .. VDDA.
Look at this thread which I found by putting "negative voltage" into the search field at top of this page.
Bob
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You need a resistor network to shift the expected input voltage into the range (roughly) GND .. VDDA.
Look at this thread which I found by putting "negative voltage" into the search field at top of this page.
Bob
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Alqasir, since you already have MAXREFDES5 why not to try it? All it takes is to connect some wires to read an SPI. At the end it all depends on specs requirements: isolation, input range, bit resolution, sampling speed etc.
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Perhaps a simpler version is required
using PSoC (TIA +DAC)
ADS7835 ±2.5V Analog Input psoc projects
ads8675 (SPI )
And you can use CY7C65211( PSoC® 4 CY8CKIT-049 ) as an USB to I2C/SPI bridge
http://mylab.wmsite.ru/moi-razrab/cy7c65211/
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Option 2 I use when there is no free DAC.
Unfortunately I do not have a ready project.
Another version of the scheme (the shift and amplification are independent):