Voltage References

Voltage references are electronic devices that provide a fixed output voltage. They provide a constant voltage regardless of external factors. This includes the load on the device, temperature or fluctuations in the power supply. Learn more in our Complete Guide to Voltage References.

Voltage references have different characteristics depending on their purpose. Voltage references used in laboratory applications are designed to have extremely high precision and accuracy, whereas those used as regulators for computer power supplies are much cheaper but less precise.

There are many different kinds of voltage references, generally categorised by type, tolerance, rated voltage, reference voltage and rated current. The most common tolerances are ±2%, ±1% and ±0.5%, but voltage references are available even up to ±40%.

Voltage reference ICs come in a standard semiconductor package, such as PDIP, SO, SOIC and SOT-23. The pin count may also be combined with the package type, for example SO-8.

Types of voltage references

  • Two-terminal shunt voltage reference
  • Three-terminal series voltage reference
  • Band-gap voltage reference
  • Low noise voltage reference
  • Micropower voltage reference

What are voltage references used for?

Voltage references can be used for a variety of different precision measurement and control systems such as power supplies in personal computers and analogue-to-digital converters. They are also used in scientific applications and in medical equipment where voltage variations need to be tested regularly. Voltage references are also used in battery-powered devices.


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Description Prix Nominal Voltage Package Type Reference Type Initial Accuracy Mounting Type Topology Maximum Output Current Maximum Input Voltage Minimum Output Voltage Maximum Output Voltage Pin Count Line Regulation Load Regulation Dimensions
N° de stock RS 108-369
Référence fabricantADR440BRZ
8,40 €
Each
Unité
2.048V SOIC Fixed ±0.05 % Surface Mount Series 10mA 20 V 2.047 V 2.049 V 8 20 ppm/V 50 ppm/mA 5 x 4 x 1.5mm
N° de stock RS 661-9827
Référence fabricantTL431CLPR
0,346 €
Each (In a Pack of 10)
Unité
2.5 - 36V TO-92 Adjustable ±2.0 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 4.83 x 3.43 x 3.68mm
N° de stock RS 121-8711
Référence fabricantLM4040AIM3-10.0/NOPB
0,942 €
Each (On a Reel of 1000)
Unité
10V SOT-23 Fixed ±0.1 % Surface Mount Shunt 15mA - - - 3 - 12 mV 2.92 x 1.3 x 0.93mm
N° de stock RS 533-8451
Référence fabricantLM4040AIM3-10.0/NOPB
1,91 €
Each (In a Pack of 5)
Unité
10V SOT-23 Fixed ±0.1 % Surface Mount Shunt 15mA - - - 3 - 12 mV 2.92 x 1.3 x 0.93mm
N° de stock RS 169-5617
Référence fabricantTL431CLPR
0,078 €
Each (On a Reel of 2000)
Unité
2.5 - 36V TO-92 Adjustable ±2.0 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 4.83 x 3.43 x 3.68mm
N° de stock RS 158-1862
Référence fabricantAD1580BRTZ-R2
1,709 €
Each (On a Reel of 250)
Unité
1.225V SOT-23 Fixed ±0.1 % Surface Mount Shunt 10mA - 1.224 V 1.226 V 3 - 6 mV 2.9 x 1.3 x 1.02mm
N° de stock RS 738-5367
Référence fabricantTLV431AFTA
MarqueDiodesZetex
0,298 €
Each (In a Pack of 25)
Unité
1.24 - 18V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 20mA 20 V 1.24 V 18 V 3 - - 3.04 x 1.4 x 1.02mm
N° de stock RS 697-8038
Référence fabricantAD1580BRTZ-R2
2,442 €
Each (In a Pack of 5)
Unité
1.225V SOT-23 Fixed ±0.1 % Surface Mount Shunt 10mA - 1.224 V 1.226 V 3 - 6 mV 2.9 x 1.3 x 1.02mm
N° de stock RS 122-0335
Référence fabricantTLV431AFTA
MarqueDiodesZetex
0,106 €
Each (On a Reel of 3000)
Unité
1.24 - 18V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 20mA 20 V 1.24 V 18 V 3 - - 3.04 x 1.4 x 1.02mm
N° de stock RS 158-1979
Référence fabricantAD1582BRTZ-REEL7
1,612 €
Each (On a Reel of 3000)
Unité
2.5V SOT-23 Fixed ±0.08 % Surface Mount Series 5mA 12 V 2.498 V 2.502 V 3 25 μV/V 3.5 mV/mA 2.9 x 1.3 x 1.02mm
N° de stock RS 111-1104
Référence fabricantREF02CPZ
3,08 €
Each (In a Tube of 50)
Unité
5V PDIP Fixed ±1.0 % Through Hole Series 8mA 40 V 4.95 V 5.05 V 8 150 ppm/V 150 ppm/mA 9.27 x 7.24 x 3.43mm
N° de stock RS 121-8516
Référence fabricantREF1004C-2.5
3,422 €
Each (In a Tube of 75)
Unité
- - - - - - - - - - - - - -
N° de stock RS 806-4689
Référence fabricantLM431AIZ
Marqueonsemi
0,036 €
Each (In a Pack of 50)
Unité
2.5 - 36V TO-92 Adjustable ±2.0 % Through Hole Shunt 100mA - 2.5 (Cathode) V 36 V 3 - - 5.2 x 4.19 x 5.33mm
N° de stock RS 921-6939
Référence fabricantLM385M3-2.5/NOPB
0,657 €
Each (On a Reel of 1000)
Unité
2.5V SOT-23 Fixed ±0.8 % Surface Mount Shunt 20mA - - 2.5 V 3 - 20 mV 2.92 x 1.4 x 0.94mm
N° de stock RS 522-9076
Référence fabricantREF02CPZ
4,62 €
Each
Unité
5V PDIP Fixed ±1.0 % Through Hole Series 8mA 40 V 4.95 V 5.05 V 8 150 ppm/V 150 ppm/mA 9.27 x 7.24 x 3.43mm
N° de stock RS 761-5895
Référence fabricantLM385M3-2.5/NOPB
1,132 €
Each (In a Pack of 5)
Unité
2.5V SOT-23 Fixed ±0.8 % Surface Mount Shunt 20mA - - 2.5 V 3 - 20 mV 2.92 x 1.4 x 0.94mm
N° de stock RS 307-1780
Référence fabricantREF1004C-2.5
4,38 €
Each
Unité
2.5V SOIC Fixed ±0.8 % Surface Mount Shunt 20mA - 2.49 V 2.511 V 8 - 10 mV 4.9 x 3.91 x 1.58mm
N° de stock RS 709-1545
Référence fabricantAD1582BRTZ-REEL7
2,354 €
Each (In a Pack of 5)
Unité
2.5V SOT-23 Fixed ±0.08 % Surface Mount Series 5mA 12 V 2.498 V 2.502 V 3 25 μV/V 3.5 mV/mA 2.9 x 1.3 x 1.02mm
N° de stock RS 166-3615
Référence fabricantLM431AIZ
Marqueonsemi
0,04 €
Each (In a Bag of 10000)
Unité
2.5 - 36V TO-92 Adjustable ±2.0 % Through Hole Shunt 100mA - 2.5 (Cathode) V 36 V 3 - - 5.2 x 4.19 x 5.33mm
N° de stock RS 121-9177
Référence fabricantREF3133AIDBZT
1,788 €
Each (On a Reel of 250)
Unité
3.3V SOT-23 Fixed ±0.2 % Surface Mount Series 10mA 7 V 3.293 V 3.3 V 3 65 ppm/V 50 μV/mA 2.92 x 1.3 x 1mm