1NTHRU 1N ELECTRICAL CHARACTERISTICS. Ratings at 25’C ambient temperature unless otherwise specified. Type. 1N 1N 1N 1N Zener Diodes are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for 1N Zener Diodes. 1N THRU 1N TA = 25°C. IR mA. Maximum regulator current(2). IZM mA. 1N . This datasheet has been download from.
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As the zener voltage starts to be exceeded, the load resistance that it produces drops rapidly down to a few tens of ohms so, as per the graph above you would expect the voltage to become clamped at around the zener point. However, this is a “small signal” graph. Yet, the real question is I don’t get the fact the zener is being able to clamp the output voltage without a resistor in series with it. In my understanding the zener should face the whole sinusoidal wave since there’s no resistor in series to share the remaining voltage with.
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The small signal output impedance is due to the op-amp open-loop gain not being infinite. Vatasheet, what exactly is going on in this circuit? Sign up using Facebook.
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Could I think of the situation as a dynamic output impedance being changed when the current begins to be limited by the opamp? What exactly would be the loading in this case? If you have a simulator handy it’s easy to simulate.
Iron Maiden 7. Now I have the same circuit but with that 1N zener connected across and the output signal behaves like below: I know it’s not clearly stated that it is for small signals but it’s something that you get used to seeing and understanding.
This means that there is current limiting built in.
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It has been clearer since the first comment up to now. Datssheet would design for 10 mA maximum. Here I have the image of a signal in the output of U2, and the output is shown in green in the graph sorry for the poor quality. Email Required, but never shown. Sign up using Email and Password.
1N Datasheet(PDF) – Micro Commercial Components
The output impedance assessment in your question I think is based on this: Tony EE rocketscientist 62k 2 21 Andy aka k 10 Home Questions Tags Users Unanswered. I guess I’ve gotten the idea.
The low output impedance you quoted is conditional on the output stage not being overloaded. The absolute continuous ratings for the TL state that the output short-circuit duration is ‘continuous’. There is a DC limit usually of k to k. Shouldn’t a zener have a series resistor in order to clamp correctly? There are several things to consider as Transistor points out and another consideration is this graph – how much output voltage swing you can get for a given load resistance: Looking at Figure 7 the positive current limit applicable to your design is 20 mA but temperature dependent.
Thank you for any help. Even feedback resistors can be regarded as a load – anything that takes current from the output pin.