Tool/software:
Hello TI community,
I am having problems with the SPI communication between the DAC60501 and my MCU, I hope someone of you can find my mistake.
The structure I use is [8-bit command][MSB data][LSB data], shift data << 4 because of left agil and 12-bit version. The start voltage is 2.5V because of the mid scale version (DAC60501M).
The first thing I tried was to set the voltage to 1.25V, the start up gain is 2x of the internal reference voltage (2.5V) -> 5V scale, so my suggestion is a DAC value of 1024 would change the 2.5V to 1.25V. A look at the datasheet tells me that the command should be 0x08 for the DAC data register. Here is the output of the SPI:
But the voltage stays at 2.5V...
after hours of trying, I decided to use other commands and to my surprise, with command 0x02, which should be the SYNC register, I got a change to ~1.25V at the output:
Can anyone tell me what is wrong with my SPI communication or what I have missed with the register/command mapping?
Thanks in advance for your assistance.
