USBRIO-7845R. Analog Output settling time

[Naveed_16]

hi.

i am using USBRIO-7845.

i have confussion about it ANALOG OUTPUT SETTLING TIME. According to data sheet, changing of LSB, its settling time cab be vary from 7us to 1.5us for 20V step.

in software, how i can change this LSB stuff. the settling time which i am achiveing is nearly 10us. i can compromise on accouracy but cant on Settling time

Regards

[TYtanic]

Hey Naveed,

So those settling time numbers can be a little confusing to read from that table, but I'll do the best I can to see if I can explain them. The LSB isn't actually a property of the 7845R that can be changed, but it's a measure of how close the output is to the desired value.

For example, in the +- 10V range with the +- 20V step:

It will take 1.5uS to get within 16bits of the desired output

or 4 uS to get within 4bits of the desired output

or 7 us to get within 2bits of the desired output. 

So it's more of a measure of how long it takes to get to a certain accuracy instead of a property that you can change. Does that make sense?