SPRZ193T January 2003 – December 2023 SM320F2812 , SM320F2812-EP , SMJ320F2812 , TMS320F2810 , TMS320F2810-Q1 , TMS320F2811 , TMS320F2811-Q1 , TMS320F2812 , TMS320F2812-Q1
ADC: Device Has Higher Non-Linearity Than the Design Goal of 2 LSBs
0 and A
Based on the current data obtained on all channels, some channels show non-linearity as high as 12 LSBs in the mid-scale range. That is, the mid-range conversions will be off by about 12 LSB counts.
This issue is corrected in the next revision of the silicon. The following option could be used to correct for INL errors only for the TMX Revision A silicon.
The INL issue is across all channels. Use the ADC results only for 9-bit data accuracy on this revision of the silicon and ignore the rest of the bits. This will mitigate the INL effect in the application provided the algorithm can tolerate 9-bit accuracy.
The data provided are typical values only. These values are obtained from bench characterization at room temperature on a few devices.
TMX samples are not fully screened for all ADC parameters. If there are devices that have worse performance than suggested issues/values, it is recommended that the part be replaced.