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Part Number: ADS7945
The transistion noise spec is 25uV which is approx .04LSBs. This seems remarkably low for a 2MSPS 14bit convertor - it is better than many (most?) 18 bit converters such as the ADS9110 which are much more expensive.
So is this specification correct? Transistion noise is usually specified in LSBs so could the 25uV be a misprint - say 2.5LSBs? I hope not, as this could be ideal for my application!
Thanks, Tony H
PS. An alternative may be the ADS9234R, or even the ADS9224R, but the datasheets still have the transistion noise as TBD. Are there any ballpark figure avaliable if not the final specification value?
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In reply to Tom Hendrick:
Thanks Tom. That's very good news - does that make it the lowest noise 14bit ADC on the market? (Of course a lot of datasheets don't specify transition noise).
Also a bit odd that the ADS7945 noise spec is a maximum of 25uV which is unusual - noise specs seem to be almost always specified as typical, for good reason I presume as it would be expensive to test for noise levels in production. I can't think of any other ADC that specifies a maximum noise figure.
In reply to tony holt:
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