Hi team -
I think I just confused myself all to heck, again. I am working with rescaling a real 0.0005 ohm sense resistor using active / passive components to make the bq34z100g1 (EVM) act as though I have a 0.0015 ohm sense resistor. For the most part, so far so good. BUT ...
I've been with the understanding that if I reach a dV of +/- 0.125 SRN to SRP at the bq inputs from the sense path, I should see a digital report of +/-32767mA accordingly, or roughly 3.8uV / bit over 15 bits of A / D.
Seems not to be so, as my testing of battery discharge through the 0.0005 ohm sense resistor rescaled by the active/passive interface that produces 0.056v to the EVM shows up in bqStudio at near -32767, and higher discharge rates are not reflected after hitting -32767.
56mV is only roughly half of the boundary dV range so I am befuddled by this finding. Before I proceed on this, please straighten out my apparently crooked understanding of the ratio / relationship between digital mA report range versus recommended +/- 0.125 input boundaries.
BTW: I have set CC gain & CC delta to 1.50 and calibrated my DUT without errors. Very low currents (under 3A) look accurate, causing me to think I'm in good shape.
thank you! -pete
