# 1V voltage reference and temperature coefficient

There are precision 1V voltage references like ADR510 which I don't have access to, though I do have LM385 1.2V, LM336Z5 5V and the famous TL431 at hand.

The easiest solution is to use a voltage divider:

simulate this circuit – Schematic created using CircuitLab

But using voltage dividers is not temperature coefficient, in page 6 of LM336 datasheet there's a schematic which claims:

If minimum temperature coefficient is desired, four diodes can be added in series with the adjustment potentiometer as shown in Figure 2. When the device is adjusted to 5.00V the temperature coefficient is minimized. Almost any silicon signal diode can be used for this purpose such as a 1N914,1N4148 or a 1N457.

• How diodes makes above circuit temperature coefficient?
• How do I achieve a temperature coefficient 1V voltage reference?
• What is the required operating temperature range and stability? – Bruce Abbott Dec 25 '19 at 22:31
• @BruceAbbott room temperature +~20 degree celsius. – ElectronSurf Dec 25 '19 at 22:39

• @VillageTech: Tip of the day: SE supports HTML entities including &Omega;, &deg;, &mu; &pm; and many more as well as <sub>...</sub> and <sup>...</sup>. So &deg;C for degrees celcius (which is lowercase when spelled out as per SI standard for units named after a person). These tricks don't work in the comments. – Transistor Dec 25 '19 at 23:30