I have a chip that takes LVDS inputs. It has a very large number of inputs and I'd like to set most of them to zero (or one) while prototyping. They can't be left open/floating.
What is a good way to send a fixed LVDS logic value to a bunch of pin pairs? (probably using passives, or a driver that can drive multiple differential pins at the same time)
The chip uses LVDS1.8, the datasheet looks like this:
Parameter | Min | Typ | Max | Unit Input Common-Mode Voltage Range, VCOM | 825 | | 1575 | mV | Logic High Differential Input Threshold, VIH_DTH | 175 | | 400 | mV | Logic Low Differential Input Threshold, VIL_DTH |−175 | |−400 | mV | Receiver Differential Input Impedance, RIN | 80 | | 120 | Ω | Input Capacitance | | 1.2 | | pF | LVDS Input Rate |1250 | | |MSPS| LVDS Minimum Data Valid Period | | | 344 | ps |
Can I just use two adjustable supplies set to 1200mV-200mV and 1200mV+200mV, and connect all the P pins together to the high voltage and the N pins to the low voltage? What current would I expect per pin pair?