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ADC input in MCU

Category: Hardware
Product Number: ADuCM355

 There is a pseudo-input voltage in ADuCM355 Datasheet, for the PGA = 1, the range of it is -0.9 ~ 0.9 V, I would like to use the ADC to measure the voltage of the resistor as shown in Figure 2, does it mean that the voltage can only be at the range of  0 ~ 0.9, or that can be 1.82 ± 0.9 v