Voltage Reference warmup and long term drift

Hi Thomas,

1) Constant power cycling will not affect ADR4550. For more information regarding this please see page 

2) The ADR4550 will settle down after 160us. This can be seen at the specification table, labelled as Turn On Settling Time. Or you could also see the voltage reference response in Figure 71.

3) No. Long term drift will work the same way power up or down.

Regards,
Mon

Hi Thomas,

1) Constant power cycling will not affect ADR4550. For more information regarding this please see page 

2) The ADR4550 will settle down after 160us. This can be seen at the specification table, labelled as Turn On Settling Time. Or you could also see the voltage reference response in Figure 71.

3) No. Long term drift will work the same way power up or down.

Regards,
Mon

Thank you for answering my questions.  This helps alot. 

I am surprised at #3.  I would think that most parts have been sitting on a shelf for several months, so they would be past the 1000 hours that long term drift is most dramatic.  Is that true or does the soldering process cause the process to begin? 

Hi Thomas,

The ELD and LTD test are done after the unit is soldered to the board. And most of this drift are due to mechanical/physical stress applied to the package due to different temperature reaction of different material.

Regards,

Mon