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SN65LVDS150: Common-mode Input voltage Vic limit question?

Part Number: SN65LVDS150

Hello,

 

I am planning on using the SN65LVDS150 to take in  a 1.125Vpp, 10MHz sine wave into its +input, and biasing the –Input to Vt or a different voltage

The Common-mode Input voltage Vic limits are a little strange in the “recommended operating conditions”? 

 One table says 2.4-(Vid/2) =2.1V?The Second table says Vcc-0.8V = 2.5V?

 Which one is the correct MAX Common-mode Input voltage Vic limit?

 http://www.ti.com/product/SN65LVDS150

  • William

    For the common mode spec, whichever equation gives a lower "maximum" value should be used.  For a typical use case (VCC > 3.15 V), the maximum VIC is limited by the differential swing (VID). But for lower supply voltages and higher differential swings the maximum VIC starts to be a function of VCC instead.

    Thanks

    David