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Hi Sir,
我們實際量測INA236,在conversion time=140us,triggered mode的設定下,IN+和IN-接在一起,量測shunt voltage,量1000次。
在1000筆的量測結果中,REG最大值為0x000A,最小值為FFF7。
我們計算了一下noise-free ENOB= log2 [(81.92mV*2)/47.5uV]=11.75bit,和datasheet上的13.1bit,差距很大,請問我哪裡算錯了嗎?
(the peak to peak noise is 19*2.5uV=47.5uV (0x000A=10, 0xFFF7=-9) )
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