The differential input of ADM485 is pull up to 5V and pull down to 0V with 10k resistors and terminated with 120ohm resistor. If the RS485 bus is not connected the input voltage cross B and A is about 30mV (receiver is enabled and driver is disabled). In this case, what is the output of the receiver?
I noticed in the datasheet the threshold voltage is between -0.2V and 0.2V. However, according to the measurement, the output is "0". Can I use this in the real application?