carpenter
Full Member level 6
I look to datasheet STM32F373
on page 101 in table Table 63. DAC characteristics I see
Higher DAC_OUT voltage with buffer ON Vdda-0,2 and in Condition corresponds to 12-bit input code
(0x0E0) to (0xF1C) at VREF+ = 3.6 V and (0x155) and (0xEAB) at VREF+ = 2.4 V
I do not understand it a little. I do not understand why it is for VREF+=2,4V Higher DAC_OUT=0xEAB
if Vref is 2,4V 2,4V/4096=0,5859375mV LSB 0xEAB*0,5859375mV =2.2V ,
Why? Ithing Vdda is 3,3V and 2,4V fulfills the condition Vdda-0,2
on page 101 in table Table 63. DAC characteristics I see
Higher DAC_OUT voltage with buffer ON Vdda-0,2 and in Condition corresponds to 12-bit input code
(0x0E0) to (0xF1C) at VREF+ = 3.6 V and (0x155) and (0xEAB) at VREF+ = 2.4 V
I do not understand it a little. I do not understand why it is for VREF+=2,4V Higher DAC_OUT=0xEAB
if Vref is 2,4V 2,4V/4096=0,5859375mV LSB 0xEAB*0,5859375mV =2.2V ,
Why? Ithing Vdda is 3,3V and 2,4V fulfills the condition Vdda-0,2