ADS1120EVM: Data spikes

Hi Drake,

Can you please explain how you connected your load cell to the EVM, and what are the jumpers installed on your EVM?

BR,

Dale

I have JP1 and JP2 installed to connect to the excitation.

I've noticed increasing the programmable gain and applied load will increase the frequency of the data spikes

Hi Drake,

Your external Vref is not 1V, you should input a correct reference voltage that is your power supply. Also, all capacitors on the EVM are not installed (NI), the series resistors are 0 ohm if you check the schematic, you can install proper value RC.

BR,

Dale

Okay I don't have more jumper blocks so hopefully this will work.

Hi Drake,

It seems you have removed your load cell, shorted all analog inputs to the ground and also shorted VREF+ and REF- together. Let me know if you have any questions.

BR,

Dale

I'm looking at the schematic. I'm attempting to install all capacitors to remove the data spikes. I assumed that meant I had to short the analog inputs to ground. The only other available inputs are the J8 and +5V AVDD. How do I install the proper RC value?