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TLC2272: Power supply abs max

Takahiro Saito
Expert 5455 points
Part Number: TLC2272

Hi team

Datasheet says that the absolute maximum is VDD+<8V and VDD-<-8V.

Is it damaged to device if VDD=9V and VDD=0V is applied?

Regards,

Saito 

  • 0
    TI__Guru* 93105 points
    Saito-san,

    The TLC2272 +/-8 V maximum supply rating is for a dual supply application. In reality, it imposes a 16 V limit on the voltage that can be applied between the TLC2272 VDD+ and VDD- pins. Therefore, it can be safely powered by a single, VDD+ = 9 V and VDD- = 0 V supply.

    Just be sure when powering The TLC2272 with the single supply that the input common-mode voltage and output voltage swing voltage are operated within the limits now set by 0 V and 9 V supply levels.

    Regards, Thomas
    Precision Amplifiers Applications Engineering
  • 0 in reply to Thomas Kuehl
    TI__Expert 5455 points
    Hi Thomas,

    Thank you for your quick answer.

    Regards,
    Saito
  • 0 in reply to Takahiro Saito
    TI__Expert 5455 points
    Hi Thomas,

    I want to add one more question about your answer.

    > In reality, it imposes a 16 V limit on the voltage that can be applied between the TLC2272 VDD+ and VDD- pins.
    How much voltage is the absolute maximum of each VDD+ and VDD- pin?

    Regards,
    Saito
  • 0 in reply to Takahiro Saito
    Guru 140200 points
    Hi Takahiro,

    you can apply any voltage, provided that the difference of "VDD+" - "VDD-" doesn't exceed 16V. So, "VDD+" = +12V and "VDD-" = -4V would be allowed, for instance.

    But again, as Thomas already mentioned, take care that for proper operation the input voltages of TLC2272 must not exceed the range "VDD-" ... "VDD+" -1.5V.

    Kai
  • 0 in reply to Takahiro Saito
    TI__Guru* 93105 points

    Saito-san,

    The absolute maximum voltage between V+ and V- is 16 V. It can be any combination of V+ to V- voltage, just as long as the total doesn't exceed 16 V. For example here are some maximum voltage combinations:

    V+          V- 

    +16 V    0 V

    +12 V    -4 V

    +8 V      -8 V

    +4 V     -12 V

     0 V       -16 V

    Just be sure you observe how the input common-mode voltage and output voltage ranges track with the particular V+ and V- you decide upon.

    Regards, Thomas

    Precision Amplifiers Applications Engineering