Hi
I have a custom made board with several ADS8638 on it and they are supplied like this:
I communicate with the ADC with LabVIEW and a NI 8451 (USB SPI device) and I have attached a screenshot of the communication when I try to set ch6-7 range and then try to read ch6-7 range. My CLK runs at 50kHz
As I read the manual, to set ch6 range to +/-5V and ch7 range to +/-5V I need to send the following bits to the ADC:
Set ch6-7 range: 00100110 00100010
read ch6-7 range: 00100111 00000000
Screenshot of setting the range:
Screenshot of reading the range:
Yellow = Chip select
Green = Clock
Blue = DIN (MOSI)
Purple = DOUT (MISO)
I am clearly not reading the contents of register 13h that contain ch6-7 ranges.... I have tried to tie AL_PD to 3,3V to make sure the ADC is not in a sleep state. It makes no difference
Any thoughts on what I am doing wrong?
/Palle