LDC1314DIAL-EVM: LDC1314DIAL-EVM

Part Number: LDC1314DIAL-EVM

Tool/software:

Hello Eddie,

do you have new informations to our topic below?

the case ist closed so i cannot make a comment to this:

TI__Mastermind 40400 points

Tobias,

I have received the board and initial room temperature testing looks okay.  I tried placing the board on my warm laptop to raise the temp a few degrees, but I haven't seen any issues yet.  I will take it into the lab this afternoon and test it in a temperature chamber and report back with results.

Update: I am able to see the issue when I bring the board to around 45C.  It seems like the issue is stemming from the connected MSP430 or the oscillator used for the MSP430.  If I monitor the SCL pin , I see a clean 350kHz clock signal.  When the jumpy behaviour is seen, I see this signal go to a much lower frequency and the pulses are not generated properly created erroneous I2C communication.  As this is a signal generated by the MSP430, it seems that the issue is on that side and not the LDC.  I need to dig further to understand which oscillator may be failing on the board, but at the moment, I am not able to capture a good crystal signal directly from the oscilloscope.  I will continue looking into this and let you know what I can capture.