I’m planning low-side sensing with the Allegro Two-Wire Hall-Effect Switch (A1190LUBTN-T) and I’d like to confirm my resistor selection for Rsense.
Current is 2-17mA and my ADC range is 0-3.3V.
V=I*R: 3.3V = (.017A) * (Rsense) gives Rsense = 194 ohms.
P=I*V: P = (.017 A) * (3.3 V) = .056 W
So, this 220 ohm 1/8 watt SIP-11 resistor array 4611X-101-221LF should be just about perfect?