DAC8775 Quad-Channel DAC EVM - unlicensed roadtest part 1: Raw SPI

RE: DAC8775 Quad-Channel DAC EVM - unlicensed roadtest part 1: Raw SPI

Jan Cumps — Sun, 15 Jul 2018 19:41:19 GMT

For the interested: slew rate control of the DAC8775: DAC8775 Quad-Channel DAC EVM - part 3: Slew Rate Control

RE: DAC8775 Quad-Channel DAC EVM - unlicensed roadtest part 1: Raw SPI

Jan Cumps — Sun, 15 Jul 2018 15:58:33 GMT

firmware explanation: DAC8775 Quad-Channel DAC EVM - part 2: Firmware

RE: DAC8775 Quad-Channel DAC EVM - unlicensed roadtest part 1: Raw SPI

Jan Cumps — Sun, 15 Jul 2018 09:02:48 GMT

Here's a measurement of default rise time, with the output set to 0 -> 5V and fully driven:

[View:/resized-image/__size/800x480/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-8490b754-93c0-4b74-8127-112ad6a36bc2/contentimage_5F00_188071.png:800:480]

The slew rate can be programmed. I'll try to set it and measure the result ...

RE: DAC8775 Quad-Channel DAC EVM - unlicensed roadtest part 1: Raw SPI

DAB — Sat, 14 Jul 2018 17:02:54 GMT

Nice post Jan.

Now you can appreciate how difficult I found the board to use.

I like simple user interfaces, not a drawn out complicated multistep process just to get an output.

DAB

RE: DAC8775 Quad-Channel DAC EVM - unlicensed roadtest part 1: Raw SPI

genebren — Sat, 14 Jul 2018 15:20:45 GMT

Nice job on getting the SPI working and pushing out data to the DACs!

Gene