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OPA375 데이터시트(HTML) 29 Page - Texas Instruments

부품명 OPA375
상세내용  OPA375, OPA2375, OPA4375 500-μV (Maximum), 10-MHz, Low Broadband Noise, RRO, Operational Amplifier
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제조사  TI1 [Texas Instruments]
홈페이지  http://www.ti.com
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OPA375 데이터시트(HTML) 29 Page - Texas Instruments

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OPA375, OPA2375
www.ti.com
SBOS886B – NOVEMBER 2017 – REVISED JANUARY 2020
Product Folder Links: OPA375 OPA2375
Submit Documentation Feedback
Copyright © 2017–2020, Texas Instruments Incorporated
The OPAx375 family incorporates internal electrostatic discharge (ESD) protection circuits on all pins, as shown
above. These ESD protection diodes also provide in-circuit, input overdrive protection, as long as the current is
limited to 10 mA as stated in the Absolute Maximum Ratings. Figure 83 shows how a series input resistor may
be added to the driven input to limit the input current. The added resistor contributes thermal noise at the
amplifier input and its value should be kept to a minimum in noise-sensitive applications.
Figure 83. Input Current Protection
8.3.6 Typical Specifications and Distributions
Designers often have questions about a typical specification of an amplifier in order to design a more robust
circuit. Due to natural variation in process technology and manufacturing procedures, every specification of an
amplifier will exhibit some amount of deviation from the ideal value, like an amplifier's input offset voltage. These
deviations often follow Gaussian ("bell curve"), or normal, distributions and circuit designers can leverage this
information to guardband their system, even when there is not a minimum or maximum specification in the
Electrical Characteristics table.
Figure 84. Ideal Gaussian Distribution
Figure 84 shows an example distribution, where µ, or mu, is the mean of the distribution, and where σ, or sigma,
is the standard deviation of a system. For a specification that exhibits this kind of distribution, approximately two-
thirds (68.26%) of all units can be expected to have a value within one standard deviation, or one sigma, of the
mean (from µ–σ to µ+σ).


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