Other Parts Discussed in Thread: LMP91000
Hi
I'm a student of Uniroma2 university in rome,
We are using the LMP91000EVM for a project, to capture the data we're using an arduino uno board, in particular we are using the arduino SPI functions for the communication. We are finding some issue in the data reading from the ADC of the evaluation board.
The data we read is not comparable with the voltage value in the differential input of the ADC. As in the schematic in http://www.ti.com/lit/ug/snau121a/snau121a.pdf the input on the ADC should be Vout - VREF that is correctly across the capacitor C8 (we measured with a multimeter), but the binary word we obtain from the ADC is not equal to that voltage value.
I'd like to understand if there could be an error in the SPI lecture of the data or if is not possible to read the data without the SPIO-4 board
Hoping for help