Random notes on resolution

Need to figure out how to present this better
(and verify all the numbers)


git-svn-id: https://bucket.mit.edu/svn/nilm/zoom@6944 ddd99763-3ecb-0310-9145-efcb8ce7c51f

notes-all.txt

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+
+LA-55:
+  DAC full range is 40A
+  Actual bits is 16
+  Stable bits is ~21
+
+  CT full range is 55 A	    (FR + 0.5 bits)
+  CT used range is 100 mA   (FR - 8.5 bits)
+  ADC resolution over used range is about 8.5 bits
+  Which would give us (FR - 17 bits)
+  -- IF the LA-55 can measure 300uA.
+     This would be 17.5 bits at its full range.
+     Spec is around 1% = 7 bits.
+
+CT-0.1:
+  DAC full range is 60A
+  Actual bits is 16
+  Stable bits is ~21
+
+  CT range is 5 mA (FR - 13 bits)
+  ADC resolution over this range is about 8.5 bits
+  Which would give us (FR - 21.5 bits)
+  -- IF the CT-0.1 worked at all.. it's broken.
+     It would be measuring 20uA.
+     This would be 12.2 bits at its full range.
+     Spec is around 1% = 7 bits.
+
+A6302:
+  DAC full range is 20A
+  Actual bits is 16
+  Stable bits is ~21
+
+  CT range is 180mA   (FR - 6.8 bits)
+  ADC resolution over this range is about 11 bits
+  Which would give us (FR - 17.8 bits)
+  -- Except CT resolution is only about 4 bits at this range.
+     Which gives us 10.8 total, at best.
+  
+