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Guidelines for posting Precision Analog - Data Converter related topics

Tom Hendrick
Guru**** 181001 points
Other Parts Discussed in Thread: ADCPRO

Hi All!  Welcome to the Precision Data Converter Forum!

This forum supports the analog-to-digital (ADSxxxx) and digital-to-analog (DACxxxx) devices found on www.ti.com in the <=10MSPS categories.  When posting to this forum, please try to provide as much information about the problem(s) you are experiencing as you can.  More often than not, we need details such as scope traces and schematics to help us help you.  If you have information that you would rather not share in the public domain, feel free to 'Start a Conversation' with one of us.  Here are some common issues:

For interface related problems:

  • Can't communicate with ADSxxx or DACxxx - we'll ask for scope traces showing the control lines. 
  • Most serial related communication problems are the result of improper data to clock edge (i.e. SPI Phase issues) relationships. 
  • I2C issues are often address related, please double check that you have the address right.
  • Parallel communication problems are often related to setup and/or hold timing issues.

 

For Performance related problems:

  • Most performance related problems are due to schematic and or layout errors; we'll ask to see schematics first, layout second.
  • ADC conversion errors are most often caused by lack of a proper drive on the input stage.
  • Improper reference voltage and/or drive causes errors in DACs and ADCs alike.
  • Improper grounding techniques cause weird or sporadic errors that can be difficult to track down, we may ask you to share your Gerber files so we can review the layout.

 

For Software related Issues:

  • We generally do not support non-Texas Instruments processors, but we'll happily share whatever code we have with you.
  • ADCPro is now supported on WinXP and Win7 (it is not tested on Windows Vista, although it may work).
  • ADSxxxxEVM-PDK driver issues are most often caused by lack of properly applied EXTERNAL analog voltages - we only supply the digital voltages, analog supplies are the customer’s responsibility.  Please review the ADCPro FAQ page for more details.

 

We will make changes/adjustments to this post as necessary so please consider this posting as a work in progress.