SDO1OGND2OVDD3CH0+4CH0–5GND6CH1+7CH1–8GND9CH2+10CH2–11GND12GND13CH3+14CH3–15GND16CH4+17CH4–18GND19CH5+20CH5–21GND22VREF23VCC24VDD25SEL226SEL127SEL028BIP29CONV30DGND31SCK32EP33