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The full-scale range (FSR) is defined by VFS+ = +VREF/GAIN and VFS-= -VREF/GAIN: FSR = VFS+ - VFS-= 2*VREF/GAIN. If VREF is sourced externally, the analog input range should not exceed 80% of VFS+ or VFS-; i.e., VID = 0.8 VFS- to 0.8 VFS+. If VREF is sourced internally, the given VID ranges apply.
