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TL071: Customer needs to know if Input Clamp Current specification of -50mA can be exceeded for a short time (?)

Part Number: TL071
Other Parts Discussed in Thread: TL072


To TI Support Team:

For the base part TL071xxx series (regardless of package type), we need to know if the Input Clamp Current specification of -50mA can be exceeded for a short time? The customer is using an input that may briefly spike a bit past that on the input from time-to-time on start-up for a few milliseconds or so, does not want to activate the input's ESD clamp, and so was wondering what the peak surge spec was for short time periods?

Can you help us with this? Can you provide the peak surge value for short time periods for Input Clamp Current spec on base part TL071xxx and email the answer to me at dan.rapp@mouser.com?

Thanks!


Dan Rapp
Technical Support
Mouser Electronics
(800) 346-6873
(817) 804-3800
www.mouser.com

Q9B8030

  • Hi Daniel,

    1. It's not wise at all to exceed the 50mA. There's no simple ESD clamps. The internal circuitry is a bit more complex.

    2. There's no need to exceed the 50mA limit. You can additionally clamp the input voltage to the rails by the help of a small signal diode (e.g. low leakage BAV199) and a suited current limiting resistor. Between BAV199 and input of TL072 place an additional 1k resistor. This allows to shunt the surge arround the TL072's input.

    Kai
  • Hi Daniel,

    The absolute maximum ratings cannot be exceeded. Doing so may result in permanent damage to the device. Please see Note 1 under the Absolute Maximum Ratings section (Section 6.1).

    To limit the current below 50mA a resistor can be placed in series with the input. I recommend watching out TI Precision Lab videos on EOS for more information.

    Thank you,

    Tim Claycomb