LM are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for LM LM LM – Precision Reference, Package: TO, Pin Nb=4. The LM series are precision, temperature-stabilized monolithic zeners offering. Title, > 5V. Description, Precision Reference. Company, Linear Technology Corporation. Datasheet, Download LM datasheet. Quote. Find where to buy.

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The Sample button will be displayed if a model is available for web samples. BOM costs thus far: I hate how the LM’s datasheet shows the example circuits in reverse to how the die is wired.

So, the first step down this path is coming up with a current source. I fear I’ll be justifying upgrading to a used A all too soon Can you explain “start-up the device” a little bit more? Sample availability may be better than production availability.

Select the purchase button to display inventory availability and online purchase options. My first attempts were a traditional op-amp with current sense resistor on the low side. X-axis is heater voltage left Y-axis is 2: The voltage 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 I came across an interesting current source in the Dataasheet datasheet: Please enter samples into your cart to check sample availability.

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It appears a drift of lm939 in the LT would result in nA drift in our current source: An R2 of 6.

National Semiconductor – datasheet pdf

However, I realized having the current sense resistor on the low side would introduce current error one way or another. Again on the diagrams: Product Categories Analog Functions. PSRR power supply rejection ratio on 14 60uV is nearly 2: The k gets a couple of volts across and it is that I refer to as start up. With best regards Andreas.

I was going to ask why they don’t have it on the other circuits link the one at the very top “10V Buffered Reference” but your last sentence answered that for me thanks!

If a model is not available for web samples, look for notes on the product page that indicate how to request samples or Contact ADI. There are some differences to mention: Given that the output will have llm399 at around 10 volts, the bias current into the LM will be approximately 10 volts minus 6. CaptnYellowShirt on May 13, This circuit seems to work, but I do admit I’m having a hard time convincing myself that it wouldn’t suffer from start-up problems what would prevent the op amp from just staying at 0V?

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I’ve really enjoyed these volt-nut threads and though I’m a newb, I’ve started down my own path of designing an LM reference. I’m not saying we should kill all stupid people. Andreas on Datsaheet 24, Seems to work quite well.

Andy aka k 10 By using datadheet site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. At least one model within this product family is in production and available for purchase.

Search Results for LM399 : 3 documents found

Sign up using Facebook. Additionally, it will keep that current fairly constant because the 10 volt output will be constant. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

So I tried wrapping my brain around making a lm3399 current source, and this is what I came up with: Temperature ranges may vary by model.

For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. The specific part is obsolete and no longer available.