SDO1OGND2OVDD3CH0+4CH0-5GND6CH1+7CH1-8GND9CH2+10CH2-11GND12GND13CH3+14CH3-15GND16CH4+17CH4-18GND19CH5+20CH5-21GND22VREF23VCC24VDD25SEL226SEL127SEL028BIP29CONV30CGND31SCK32PAD33