Hi,
I'm sure you have your reason but can you explain why you need 24bits?
I mean, 100bar across 24bits gives you a resolution of 0.000006bar. Does a transducer capable of measuring 100bar really resolve to that kind of precision?
If you already have your 4-20mA converted to 0-5V (and not 1-5V) you'd get ~0.1bar resolution with the built in 10bit ADC. You could do some oversampling to "emulate" a 12bit ADC giving you ~0.025bar resolution.
Just some ideas.
/Henrik.
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