I have received an EVM of the DAC8552 for one of my customers.
We're trying to operate it without success.
Please see attached our steps.
We're working with the MMB0 board
1. Connecting the MMB0 + DAC8552 boards to power and USB and runing the DXP.
2. DXP can't download the DAC8552.xml automatically. From a short search on the web we've found the attached file and copied it to the following path : C:\Users\Public\Documents\DXP\Devices.
3. On the DXP software it shows green light. We press the 'Run DAC' button.
We expected to see a sinewave on the scope. Instead we just see some very low noise on the scope. When stopping the DAC the noise level on the scope reduces..
4. We've examined the inputs of the part and it seems like the SPI commands are going through correctly, the Vref is about 3.3V and the Jumpers are as described on the user guide.
Can you please advise ?
<?xml version="1.0"?> <device> <name>DAC8552</name> <revision>1.0.0</revision> <date>21Aug2012</date> <devicesettings> <instructionwidth>24</instructionwidth> <channels>2</channels> <format>sbinary</format> <dataword>CCCCXAXXDDDDDDDDDDDDDDDD</dataword> <commanddefault>3</commanddefault> <commandlatch>3</commandlatch> <maxupdaterate>1000000</maxupdaterate> <interface> <type>spi</type> <polarity>0</polarity> <phase>1</phase> <maxsclk>10000000</maxsclk> <framebits>24</framebits> </interface> <latchpin> <feature>0</feature> <pulsepol>0</pulsepol> </latchpin> <FSplus>5</FSplus> <FSminus>0</FSminus> </devicesettings> </device>