VADJ fixed to 2V5 or variable
VADJ can be adjusted by means of a digital potentiomenter (IC22, MAX5483). If this option is not required a fix resistor network can be mounted.
Variable VADJ is defined by:
IC22 ON, R344 ON, R345 ON, R351 ON, R371 ON, R352 ON, R346 ON, R347 ON, R353 OFF
Fixed VADJ:
IC22 OFF, R344 OFF, R345 OFF, R351 OFF, R371 OFF, R352 OFF, R346 OFF, R347 OFF, R353 ON
R353 should be of 28k for VADJ=2V5
Notice that there is also an option for enabling VADJ from power up or letting the FPGA control the VADJ enable.
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