Tool/software:
Hi, customer is interested in the max tolerance of the DCO (Digitally Controller Oscillator):
- Is this tolerance across unit-to-unit? In other words, could one unit be -3.5% while another unit is +3.5%, but each unit will be pretty tight around the number its at across temperature? Or is it expected that any single unit will vary quite a bit across the temperature range?
- What goes into “factory trimming”? Is it calibrated at ambient temperature only? What is the expected accuracy of whatever the calibration point is?
- For our use case, we’re interested in knowing that any single unit will be tighter (ideally no wider than +/- 2%) (for the purpose of UART baud rate accuracy). Does TI have any recommendations for identifying units which actually behave much tighter than this spec? Is it possible for us to screen them ourselves? Is it possible to have TI screen them? Or are there technical/design reasons why tighter tolerances would never be doable?
- If TI can’t guarantee which is tighter than the datasheet lists, is there any technical data which might tell us that it is likely to behave tighter than this?
Table 5-6 DCO from the dataheet:
