Category: Hardware
Product Number: AD5721RBCPZ-RL7
Using the AD5721RBCPZ-RL7 in a 5 daisy chain, I'm currently seeing the 2nd DAC SDO 'lock up'. But yet I can configure and control the first 2 DACs out of 5 to do any voltage output I desire accurately. I am currently assuming it is not a PCB fault (I have probed all power lines which seem appropriate) and that I am configuring something incorrectly.
I send in order during separate transactions (tested multiple clk speeds/ clk edge rise times):
"0x0F0000" 5 times during the same transaction.
wait 1 second
"0x040067" 5 times during the same transaction.
wait 1 second
"0x03fff0" 5 times during the same transaction.
The snyc (blue), clk (green) and data (red) going into SDI of the 1st DAC is shown below (all looks appropriate):
SDO of the 1st DAC is shown below (looks appropriate):
SDO of the 2nd DAC is shown below (looks likes its 'locked up'):
As mentioned the voltage output of the first 2 DACs is appropriate/ Max voltage but the following DACs do not change due to the 2nd DACs SDO output.
