The DS90LV028A-Q1 differential line receiver is capable of detecting signals as low as 100 mV, over a common-mode range of 0.5 + (V_ID/2) V to 2.1 - (V_ID/2) V. This is related to the driver offset voltage which is typically +1.2V. The driven signal is centered around this voltage and may shift ±0.5V around this center point. The ±0.5V 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 +0.5V to +2.1V (measured from each pin to ground). The device will operate for receiver input voltages up to V_CC, but exceeding V_CC will turn on the ESD protection circuitry which will clamp the bus voltages.