OPA548: is there a timing requirement for both power up and power down for both positive and negative electricity

Hi Hazel, 

Hazel Sun said:

 is there a timing requirement for both power up and power down for both positive and negative electricity?

Are there any specific power up and power down scenarios you are asking? I am not aware of any power up or down timing issues in this part. Generally, power up and power down sequencing are synchronized somewhat. I do not know what the questions are referring to? Please let me know. 

Best,

Raymond

Hi Raymond,

Now we use dual supplies，such as ±12V，but there is a sequential relationship between the positive and negative power sources being powered on and off，so Will this sequential relationship cause abnormal operation of the amplifier？

Hi user3784482, 

The normal power up or power down sequences should not result any abnormal operation of the amplifier. At least I am not aware of any. Could you describe the possible abnormal operation after the power ramp up or power ramp down events? Please let me know. 

Best,

Raymond