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LDC1312: TIDU952 output data with stable state

Kai Nomiyama
Expert 5285 points
Part Number: LDC1312

Hi Team,

Regarding TIDU952, I got following questions so could you help me?

Question

Max/Min angular position accuracy at stable situation.

 

 

Following is test condition

1. Put TIDU953 on table(no effected from external objects)

2. Read TIDU953 Angular position data

3. investigate how output angular position data changes from ideal value.

 

e.g.

put TIDU953 on table with 0 position

read angular position from TIDU953

investigate how output angular position data changes from 0 position.

Thanks,

Regards,

Kai

 

  • 0
    TI__Genius 13650 points

    Hello Kai,

    if I understand correctly, you are requesting the output error over dial angle curve. This is plotted in figure 1 of the user guide: http://www.ti.com/lit/ug/tidu953/tidu953.pdf 

    Is this the information that you are looking for?

  • 0 in reply to Ben Kasemsadeh
    TI__Expert 5285 points

    Sorry but not TIDU952 but TIDU953...

    what customer wants to know is how output data(angular position data) changes from ideal data.

    LDC1312 has 12bit counters and outputs binary data.

    e.g.
    LDC1312 outputs 0x000011111111(0x0FF) in stable state and LDC1312 always outputs  0x0FF  in ideal condition(target coil and LC tank are fixed, don't move)..

    However depends on internal/ external environment, output data would be changed form 0x0FF.


    TIDU953 converts output data to angular position data.


    Now, what customer wants to know is in stable state how angular data(e.g. 90 + α) changes from ideal data (90).

    (in this e.g. I use binary data but customer request is angular position data. it means how angular position data changes when converting output binary data including variability to angular position data.)

    thanks,

    regards,

    kai

  • 0 in reply to Kai Nomiyama
    TI__Expert 5285 points
    Hi Team,

    Could you support this?
    Please let me know if you need more information.

    Thanks,

    Regards,
    Kai
  • 0 in reply to Kai Nomiyama
    TI__Genius 13335 points

    Hello,

    The accuracy of this design was characterized to be less than degree. As Ben mentioned, please refer to Figure 1 from the TIDU953 design guide for this information.

    Also note that if calibration is used, the accuracy can be further improved. Table 1 shows the accuracy over temperature for a few example calibration methods.

    Regards,

    Luke