Kiran,
One other thing that I wanted to note about #3 is that using a external supply is possible, but you need to make sure the internal buck-boost is not enabled. There some discussion about that in the DAC8775EVM, in section 2.4.2.
Joseph…
Hi Joseph,
I tried to do what you told me.
After enabling the internal reference I can measure 5V.
I measured VPOS_IN_x and VNEG_IN_x before setting it using register oxo6 and 0x07 and it was something like 150mV. Then I enabled BBc on every DAC…
Part Number: DAC8775 Other Parts Discussed in Thread: , ISO7720 Hello Team,
I'm working with DAC8775. I have doubts on DVDD supply to DAC8775 chip. What will happen if DVDD is supplied by both Internal DVDD(LDO) of the chip
and as well as through…
Max,
The DAC8775 DAC channels can be independently set for different outputs. You can use the Select DAC register (0x03) to select the DAC channel you want to write to. After that, you can then write to the Configuration DAC register (0x04). You would…
Henrik,
I'm glad that worked out. I would point out that you still can use a TVS diode, but you just need to use one with a higher voltage. If you look at the DAC8775EVM, the circuit uses a TVS diode on the output as well. It uses a CDSOD323-T36SC…
Nithin,
There shouldn't be any other configuration to set to detect the open circuit condition. I ran the test for this using the DAC8775EVM, and I only had a few configuration settings:
Enable the buck-boost (both pos and neg)
Enable the reference…
Nithin,
I did run a quick test using the DAC8775EVM and when I power up the device and set the output voltage with a DAC code of 0x0000, I get an output of about 200uV out. This seems reasonable, so you should be able to get much closer to 0V than…
Benjamin,
I'm sorry, but we don't have any API, driver, or library. The closest thing that we have is the GUI software used for the DAC8775EVM. Even then, this is just an executable written from LabVIEW.
If you are designing something with the DAC8775…
Hi Christina, Yes, that is correct. The datasheet implies that the readback will be the entire SPI frame, but doesn't show a specific example. Here is an example that I just did with the DAC8775EVM, except it doesn't have CRC bits. If there were CRC bits…
Brian,
I am using a DAC8775EVM and I'm able to get 24mA output without any problems. How do they have their circuit set up? Are they using the internal reference or an external reference? What load are they using on the current output?
The Configuration…
