I want to use a sensor with analog output in my design. The output of the sensor is a low frequency traingular wave (less than 300 Hz) and voltage vetween 0 - 5V. I need to carry the sensor signal to the controller through a cable, approximately 400mm in length. The sensor supply voltage and ground line also comes from the controller. I have following questions

  1. There is a strong noise source (motor windings) close by. How can I improve the noise immunity of the signal carried to my controller?
  2. The literature I have gone through suggests approaches like shielding, single ended to differential conversion or conversion to current signal. Is there any other approach available for this kind of situation?
  • \$\begingroup\$ Can you digitise at source? \$\endgroup\$ – awjlogan Oct 4 '18 at 9:25
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    \$\begingroup\$ Send over co-axial cable? \$\endgroup\$ – rdtsc Oct 4 '18 at 10:19
  • \$\begingroup\$ Digitization at source is an issue, because it will add time overhead required for communication. I do not wish to add delay between sensor output and my controller reading the same. It will be detrimental to my application. \$\endgroup\$ – Firebird207 Oct 4 '18 at 10:25
  • \$\begingroup\$ Try it by direct connection and see if there is too much noise. \$\endgroup\$ – Andy aka Oct 4 '18 at 10:36
  • \$\begingroup\$ What's wrong with the approaches you have found so far? \$\endgroup\$ – Dave Tweed Oct 4 '18 at 11:25

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