The DS90LVRA2 differential line receiver is capable of detecting signals as low as 100 mV, over a common-mode range of ?1 V to 2 V (V_CC at 1.8 V). This is related to the driver offset voltage which is typically +1.2 V. The driven signal is centered around this voltage and may shift around this center point. The shifting may be the result of a ground potential difference between the driver's ground reference and the receiver's ground reference, the common-mode effects of coupled noise, or a combination of the two. The AC parameters of both receiver input pins are optimized for a recommended operating input voltage range of +0 V to +3 V (measured from each pin to ground).