Vsense Iload Rf1 Common-mode voltage: 2.9 V to 70 V Rf2 Cf 5V Cf Vp Vm Rg1 Rg2 Vcc Sense amplifier Voltage buffer Vcc SEL GPIO ADC K2 TSC1031 Vcc- Out Rg3 Gnd A1 Rf3 Gnd µController