LM399 DATASHEET PDF

The LM series are precision, temperature-stabilized monolithic zeners offering temperature coefficients a factor of ten better than high quality reference zeners. Constructed on a single monolithic chip is a temperature stabilizer circuit and an active reference zener. The active circuitry reduces the dynamic impedance of the zener to about 0. Further, a new subsurface zener structure gives low noise and excellent long term stability compared to ordi- nary monolithic zeners. The package is supplied with a ther- mal shield to minimize heater power and improve tempera- ture regulation. The LM series references are exceptionally easy to use and free of the problems that are often experienced with or- dinary zeners.

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JoJozilkree One could top it off with a Petri dish? The model has been scheduled for obsolescence, but may still be purchased for a limited time. Model Package Pins Temp. At work I am using some customized thermostats out of — you guessed right — tuner boxes embedded in styrodur-like foam.

Sign up using Facebook. By using our site, you acknowledge that datassheet have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Seems to work quite well. Once an order has been placed, Analog Devices, Inc. Due to environmental concerns, ADI offers many of our products in lead-free versions.

Post as a guest Name. With best regards Andreas. Spehro Pefhany k 4 Please Select a Region. So I tried wrapping my brain around making a high-side current source, and this is what I came up with: Read the first post of this thread.

Please Select a Language. Given that the output will have stabilized at around 10 volts, the bias current into the LM will be approximately 10 volts minus 6. An R2 of 6. There are some differences to mention: My first attempts were a traditional op-amp with current sense resistor on the low side.

The subsurface Zener operates over a current range of 0. This struck me as being interesting, because this greatly reduces the parts count, and also daatasheet the only pins which need to touch a voltage regulator are the op amp supply pins. So, the first step down this path is coming up with a current source. Test setup is the same as datasehet post. CaptnYellowShirt on May 13, The Sample button will be displayed if a model is available for web samples.

The LM requires that its operating current is between 0. The datasheet may not be very accurate during start up but it will be a few volts and the op-amp will produce some amplification and then deliver enough current through the 5 kohm to properly bias the LM Related Posts.

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LM399 DATASHEET PDF

The model number is a specific version of a generic that can be purchased or sampled. Status Status indicates the current lifecycle of the product. This can be one of 4 stages: Pre-Release: The model has not been released to general production, but samples may be available. Production: The model is currently being produced, and generally available for purchase and sampling. Last Time Buy: The model has been scheduled for obsolescence, but may still be purchased for a limited time.

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