How do i wire a 4 pin hall sensor: 200A model below


I don't understand the wiring schematic below enter image description here

I currently have +15 to pin 1, -15 to pin 2, V high from das to pin 3, Vlo from das to pin4. Power is from a regulated power supply. The only way for me to get reasonable data to the das is to jump the 10k ohm between pin 4 and -15. Is this correct?

  • \$\begingroup\$ The bigger question is ; what is the signal bandwidth of 200A and what is considered noise? such as crosstalk from 100A transient in say 20~2000 microseconds should be 2V signal +/-1% and not affected by CdV/dt or LdI/dt of crosstalk. What is the cable and ground design? \$\endgroup\$ – Tony Stewart Sunnyskyguy EE75 Nov 13 at 16:34
  • \$\begingroup\$ I'm measuring the output of an RC ESC, switching frequency is 8khz. it approximates a sine wave between 100-800hz. 3 phase being measured is floating (DC battery pack providing power). Daq and power supply are grounded to earth (AC wall power) \$\endgroup\$ – donrafa7 Nov 13 at 19:37
  • \$\begingroup\$ OK if you are using this for servo current feedback then 800Hz is frequency BW but Phase needs to be greater BW while rejecting 8kHz is noise but also phase shift can be noise and more likely transients due to current commutation risetime and sampling time of ADC. Some care in shielding of signals from motor current commutation and cable orientation with coupling of motor commutation noise. I wonder what sampling rate and anti-aliasing filter phase shift exists on signal. Did you analyze aliasing and cross-talk effects yet? \$\endgroup\$ – Tony Stewart Sunnyskyguy EE75 Nov 13 at 19:50

Look at the diagram one row of figures up, on the right. Pin 3 is your output voltage, and is connected to ground (not -15) through a 10K resistor. I don't know what you mean by "das"

  • \$\begingroup\$ data acq system I suspect. \$\endgroup\$ – Andy aka Nov 13 at 15:41
  • \$\begingroup\$ DAS/DAQ data acquisition. I am doing differential sensing on the daq so i have vhi/vlo instead of V and ground to the daq. Maybe thats my issue? Ill go single ended and try what you mentioned. I dont trust/understand the schematic because it has +15 and -15 both going to ground, when i do this it shorts the power supply. \$\endgroup\$ – donrafa7 Nov 13 at 15:55
  • \$\begingroup\$ Then you have something wrong with your power scheme. Both power supplies must be reference to Ground, as usual. There is some nastiness going on with the battery symbol looking like it connects to other pins, but it does not. \$\endgroup\$ – Scott Seidman Nov 13 at 15:57
  • \$\begingroup\$ For power i have a meanwell 24V din rail supply + a buck converter to drop to 15V. Link below. Power supply and DAQ each have their own ground. Since pin 4 is labeled 0V above do you think it is intended to be ground reference for signal? ALso thanks for the help alliedelec.com/product/mean-well-usa/mdr-20-24/70069737/… \$\endgroup\$ – donrafa7 Nov 13 at 16:07
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    \$\begingroup\$ @donrafa7: that sensor requires a bipolar power supply: +15 V, -15 V and 0 V/Ground. From your description you have a single 15 V supply. \$\endgroup\$ – Peter Bennett Nov 13 at 17:34

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