Manual

71M6541 Demo Board REV 3.0 User’s Manual

49 Rev 4.0

Figure 2-10:

GAIN_ADJ over Temperature

Some curve-fitting is required to find

PPMC

and PPMC2

coefficients that will generate the desired behavior

of the GAIN_ADJ register. For this case, PPMC

= -960 and PPMC2

= -610 approach the curve very accu-

rately. The maximum deviation between GAIN_ADJ and the GAIN_ADJ’ synthesized by PPMC and PPMC2

coefficients is 0.00435%. Figure 2-11 shows how both functions almost overlap.

Figure 2-11: GAIN_ADJ and GAIN_ADJ’ over Temperature

16310

16320

16330

16340

16350

16360

16370

16380

16390

16400

16410

-40 -20 0 20 40 60 80

GAIN_ADJ

GAIN_A…