TMS320F28034: Internal oscillator frequency movement with temperature, under compensation

Jordan,

Customer can reference table 5-7 in the datasheet  http://www.ti.com/product/TMS320F28034/datasheet/specifications#IDthU9-20csylv 

In terms of the movement of the internal oscillator when the compensation routine is used http://www.ti.com/lit/an/sprab84a/sprab84a.pdf; this is difficult since the algo uses a 2 point best fit line to interpolate the oscillator movement with temp. This is adequate to get the trim in an acceptable range (a few trim steps), but distorts the change over temperature vs the graph in the DS.

Would it help to elaborate on the customer requirement and temp profile for the internal oscillator?

Best,
Matthew

Hi,

Customer is using internal oscillator, first *12, then /2, to achieve 60MHz.

To achieve better performance of the system, they need the output of PLL to achieve 60MHz +/- 0.7%, with -30~75C.

Is that possible? Or any way to achieve?

Thanks a lot.

Br, Jordan