PGA280 Distortion Data Needed

Terry16065

Other Parts Discussed in Thread: ADS1278, PGA280

I’m looking at the PGA280, 1 per channel or 8 per ADS1278, but I can’t find any distortion data. I’d like distortion or (THD+N) verses frequency for 5Vpp output verses frequency for each gain. It doesn’t have to be at 5Vpp, it’s just preferred.

over 14 years ago

0 Nate over 14 years ago

TI__Genius 11680 points

Team,

Could someone take a look at this request please?

Thanks.

0 Luis Chioye over 14 years ago in reply to Nate

TI__Guru 55466 points

Hello Terry,

The PGA280 is a high precision instrumentation amplifier with excellent DC precision. The Small signal Gain Vs Frequency curve is shown below. The knee of the flat region of the small signal gain vs frequency curve is located somewhere around ~30kHz depending on gain setting and the device is not expected to operate for input signals above the 100kHz range. What is the signal frequency range required for this application? We could look into obtaining THD+N data on a few devices.

Thank you and Best Regards,

Luis

0 Terry16065 over 14 years ago in reply to Luis Chioye

Expert 1185 points

Luis,

The input is from DC to 25kHz. I would want to see harmonic distortion data or THD+N sweep verses frequency for up to a 25kHz input that sums at least up to the 4^th harmonic of 25kHz.

0 Luis Chioye over 14 years ago in reply to Terry16065

TI__Guru 55466 points

Hello Terry,

I will work in the set up and look into obtaining this data; it may take a few days.

Best Regards,

Luis

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PGA280 Distortion Data Needed