CN0300: DAC output settling time

Question

Accepted Answer

Q 
 After a reset sequence, how long does it take for the DAC output to settle? I 
 
 assume a number of ADC readings are required? 
 
 A 
 There is a settling period required which will take several seconds after a 
 
 reset sequence. For the first write to the DAC output, the function “UpdateDAC 
 
 ()” is called – this function does not use DAC calibration values and it does 
 
 not use ADC compensation. After this, the function “FineTuneDAC()” is used to 
 
 update the DAC and this uses the ADC feedback value. Applications should allow 
 
 for a number of iterations of this loop taking several seconds to see a settled 
 
 output current. The debug strings sent to the UART list by how many DAC codes 
 
 the DAC is tweaked with every pass of “FineTuneDAC().”