TI IC 2812
TI IC 2812
(OP)
Hi All,
We are using the Texas Instruments IC (TMS320F2812PGFA,LQFP176,DSP) and having issues with the A to D converter. It seems that some have an offset voltage from 0 mV up to 50 mV which is causing some of other measurements to be off. Has anyone seen this and have a nice fix for this issue?
Tofflemire
We are using the Texas Instruments IC (TMS320F2812PGFA,LQFP176,DSP) and having issues with the A to D converter. It seems that some have an offset voltage from 0 mV up to 50 mV which is causing some of other measurements to be off. Has anyone seen this and have a nice fix for this issue?
Tofflemire





RE: TI IC 2812
Look on TI's website for the application note on calibrating the ADC. The application note provides information on the theory of how to compensate for the ADC errors and provides some assembly language library routines that will do the trick.
Using these routines, and some oversampling with decimation and low pass filtering, I have acheived an accuracy within about .1% to .2% with the F2812's ADC.
RE: TI IC 2812
Thanks for you reply, we are going to calibrate the ADC.
Tofflemire