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  1. yarayara

    cheap voltage reference over temperature

    trying to save money... saving saving saving. its cheaper to buy the chip. I build a better circuit, but its more expensive =/ I guess a Zener diode is fair enough for a non critical application. Thanks everybody.
  2. yarayara

    cheap voltage reference over temperature

    Good performance would be 5% The link looks good! 10 cents is cheaper than the 33cents I pay for the Zetez, but the operating temperature of the TL431 is from -25 to +80°C. My applications requirement is from -40°C to +90°C :/ But thanks anyway.
  3. yarayara

    cheap voltage reference over temperature

    Hi, I want to build a cheap voltage reference for a circuit. I normally use a ZR431LF1 (Zetex voltage regulator), but I find it quite expensive. I though about using a Zener diode with a voltage follower, but it might not be reliable over temperature (-40 to +90°C). How can I build a voltage...

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