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DAC9881: Glitch Reduction
Part Number: DAC9881
I am trying to reject glitches from a DAC. We want highest possible resolution (about 18 or 20 bit) in a bipolar output of +-10V.
If we select the DAC9881 some glicht will occur. I have looked at the: http://www.ti.com/tool/TIPD142
This will help according to the note - but still some glitch will occur.
How can we make this work with +-10V output?
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In reply to Uttam Sahu:
Some guidelines for the DAC.
- We want a bandwidth of at leaset 100kHz (200kS/s).
- Since we ramp the signal in different ways (exponential, sawtooth etc) we dont want glitches.
- We want 16 bits or higher
- We have tried implementing an external s/h filter to reduce glitches at major code changes. This does not seem to help because the analog switch introduces switching noise in the signal chain. Maybe the TIPD142 app-note is a better answer. They use a TS12A4515DBVR.
In reply to Martin Stougaard:
Apologies for the delay. If you need 18-bit resolution, we only have DAC9881 in our portfolio. But if you can manage with a 16-bit resolution, we have a family of MDACs that are geared for very low glitch and higher update rate requirements. You can look at DAC8811 to start with.
let me know if that helps.
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