Hi Evan,
Thanks for detailed description of the issue with excellent supporting data!
Base on your report, it looks like some channels have good performance (single-modal distribution, maybe 4-6 codes wide across 200k conversions, 0.5-1 LSBs standard…
Part Number: ADS8339EVM-PDK Other Parts Discussed in Thread: PSIEVM Hi Team,
My customer tested the ADS8339EVM and found that the SNR and THD were not good (80 and -74 dB, respectively)
The input signal source is the PSIEVM. Below is the test setup
Here…
Hello,
No, SMA-to-SMA cables are not included with the ADS8900BEVM-PDK kit. However, if you order the optional PSIEVM to use with the ADS8900BEVM, this kit does include 2 SMA-to-SMA cables.
Regards, Keith Nicholas Precision ADC Applications
Hi Yogini,
Based on the results I don't think you have a good connection between the signal source and the ADC. I think you will want to improve your setup to get your results to be much less noisy and chaotic before worrying about the accuracy. Some…
F.F.
For testing the ADC I recommend using the following signal injector EVM from TI http://www.ti.com/tool/PSIEVM I have used this to replicate the DS numbers for both 12-bit and 16-bit modes of this ADC.
The output of the PSIEVM is SMA which is also…
Hi Venkatesh,
There is nothing different in the chip about ADC-D. You can use ADC-D in single-ended mode and you can use ADC-A, B, or C in differential mode.
If you want to use ADC-D to sample a single-ended signal, just hook your signal up to one of…
Hi TI Team,
Sorry, I was not read the datasheet of PSIEVM . Just now I read it and I get to know this kit can be used for SAR based ADC's. It can be used to give Single ended as well as Differential signals.
Correct me if I wrongly understood
Thanks…
Hi Benjamin,
Note that 16-bit ADC noise/distortion specifications are given with the condition fin = 10kHz. Frequencies higher than this (e.g. 100kHz) will have lower performance.
Note also that at 100kHz fin and 164kHz sampling rate, you have crossed…
Hi Daniel,
How is the sampled waveform reconstructed?
Do you have a spectrum plot of both the input waveform and the reconstructed waveform?
What do the signal conditioning circuits look like in this case?: What is the driving buffer and topology…
Mike,
Just for clarity sake my understanding of the problem is:
Q1)Can TI suggest a clean voltage source for the ADC to sample to see the performance of the ADC.
Assuming this is true, the TI data converter group has this EVM http://www.ti.com/tool/PS…