1
\$\begingroup\$

I'm working with an MCP37231/21-200 that requires a differential input for the clock. I need to know if I can use an LVDS input to drive my clock. The output clock is specified to have LVDS capabilites, but the input clock does not state that.

enter image description here

enter image description here

From my understanding, LVDS inputs have a differential voltage of ~350mVpp, so it should work in this application. I'm also concerned about the common-mode voltage from the LVDS pair and the internally-generated common-mode voltage.

Would using an LVDS type signal be appropriate?

\$\endgroup\$
  • 1
    \$\begingroup\$ Do you have a choice as to whether to use LVDS or something else? If you have a choice, LVPECL has better jitter characteristics than LVDS. If you AC couple and terminate before the AC coupling, then LVDS should work fine. \$\endgroup\$ – crj11 Apr 24 '18 at 14:42
  • \$\begingroup\$ My thoughts exactly. AC coupling saves me the most space anyways as opposed to the transformer-coupled Differential pair given as an example. \$\endgroup\$ – EE_David Apr 24 '18 at 14:49

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.