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TL432B: shunt reference WCCA discussion

user1029689
Prodigy 60 points

Part Number: TL432B

Hi, I'm using TL432B-Q1 in my project. I'm doing worst-case-condition-analysis.

 

Per TL432BQDBZRQ1 datasheet, it defined many items, eg. reference voltage Vref and deviation of reference voltage over full temperature range VI(dev)...

The system will do calibration at the factory. The operating temperature of the product is -40oC to +125oC. The application is same as Figure 3 in datasheet with R1=1k, R2=3.01k, 5V input.

 

Which item can be eliminated by doing the calibration?

Which item should be taken into account?

  • 0
    Guru 140200 points
    Hi user,

    do you need a very precise voltage reference? Why have you chosen the TL432B?

    Kai
  • 0
    TI__Mastermind 19370 points

    Hi User,

    This is all dependent on what type and when the calibration is happening. A lot of parameters can be attenuated with calibration but not completely removed.

    For example if you want to calibrate the accuracy deviation you need to first precondition the device to remove the effect like thermal hysteresis.

    This is a vague question that is dependent on what tools you have available. Keep in mind that your device is as accurate as the weakest link and the TL431 requires external resistors that also have to be taken into account.

    -Marcoo Z