ST’s portfolio of precision shunt voltage references include:

  • High-power references, with a maximum cathode current of 100 mA
  • Adjustable output voltage from 0.6 to 36 V
  • Micropower references, dedicated to portable applications, with a minimum cathode current as low as 40 µA and precision as good as 0.1%

These perform functionally in a similar way to Zener diodes but have better specifications.

LM4041 micropower shunt voltage reference

Demonstrating a stable 1.225 V output voltage at very high precision with an initial accuracy of 0.1% @ 25 °C, the LM4041 shunt voltage reference exhibits an ultra-low operating current of 40 μA which makes it ideal for micropower designs. It is available in the low noise and small SOT323-5L and SOT23-3L surface mount packages.

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