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TLE2022A-Q1: Power supply interruption

Part Number: TLE2022A-Q1
Other Parts Discussed in Thread: TLE2022-Q1

Hi,

I am checking whether the IC may not operate properly depending on the instant of power supply interruption time and the value of power supply voltage.
The figure below is an image. Are there any conditions that cause problems?

Best Regards,

  • Hello Kaji,

    The TLE2022-Q1 has a recommended supply voltage range of +/-2 V to +/-20 V (+4 V to +40 V) so it operates over a very wide supply range. If the voltage momentarily drops below the minimum supply voltage of +/-2 V (+4 V), then it may cease to operate in a linear manner and depending on how low the voltage drops it may even stop functioning as an amplifier. Figure 39 in the datasheet shows that if the supply voltage drops several hundred millivolts below the operating minimum Vcc = +/-2 V that the operating current drops off very quickly. That is strong indicator that the internal biasing is being lost and the amplifier is shutting down internally. When that happens normal op amp operation cannot be expected. However, shortly after the voltage rises back above the minimum, normal operation should resume.

    Last year, I wrote a blog about what can occur when an op amp is subjected to a supply under-voltage condition. That may provide you more insight. 

    e2e.ti.com/.../op-amp-supply-limits-are-they-critical-part-2

    Regards, Thomas

    Precision Amplifiers Applications Engineering