Quantify D/A output noise on NI-6259 and NI-6289?

[RonW]

I have a couple of questions about the analog output of the NI-6259 and NI 6289.

1. The specs mention a "settling time" of 2 usec for the NI-6259 and 3 usec for the NI-6289. I'd like "settling" quantified, e.g., is it the time to settle to within 1 lsb of the programmed output?

2. I'd like to know the rms noise on the D/A outputs for the various ranges. Even if it's within an lsb, I'd still like to know what it is.

Thanks in advance.

[tnek]

Hi Ron,

The settling time in these sepcifications is defined as the time it takes for a voltage step to settle within 1 LSB of a full scale voltage step. So if your analog output range is ±10V, then the settling time is the time it takes to settle to within 0.3 mV of your output value (20 V / 2^16). More information about settling time can be found in this article. For the noise of your output, this information is listed in the specificatons of your card under AO Absolute Accuracy Table. 

Regards,

Kent

Applications Engineer