Reference diode
A reference diode is an electronic component that is used in electronic circuits to generate a highly stable electrical voltage and to use this as a reference voltage source.
Temperature-compensated Zener diodes are mostly used as reference diodes for medium to higher reference voltages - from approx. 6 volts upwards . Here, a Zener diode with a positive temperature coefficient is operated in series with one or more conventional diodes which are connected in the forward direction and have a negative temperature coefficient. The number of diodes in series is chosen so that the value of the temperature coefficient of the overall arrangement is minimal. In this way, temperature coefficients as low as 0.0005% / ° C can be achieved.
Reference diodes for low reference voltages - around 1 ... 1.5 volts - are usually implemented using more complex structures .
Exemplary components are the JEDEC -registered reference diodes 1N821… 1N829 for average reference voltages around 6.3 volts, the reference diodes 1N4057… 1N4085 for higher voltages of 12.4… 200 volts and the reference diodes LM113 / LM313 designed for low reference voltages around 1.2 volts .
Individual evidence
- ↑ a b Kent Walters: Zero-Temperature Coefficient Reference Diodes (MicroNote Series 205). (PDF; 70kB) Microsemi , 1997, accessed on June 23, 2013 (English).
- ↑ a b Temperature Compensated Zener Reference Diodes. (PDF; 354 kB) Microsemi , May 5, 2003, accessed on June 16, 2013 (English).
- ↑ a b LM113 / LM313 Reference Diode. (PDF; 288 kB) Texas Instruments , May 2, 2013, accessed June 19, 2013 .
- ↑ High Voltage Temperature Compensated Zener Reference Diodes. (PDF; 288 kB) Microsemi , November 12, 2012, accessed on July 7, 2013 (English).