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 Price 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
RS Stock No. 523-7011
Mfr. Part No.REF195GSZ
MYR15.87
Each
units
5V SOIC Fixed ±0.04 % Surface Mount Series 30mA 18 V 4.99 V 5.01 V 8 8 ppm/V 8 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 538-7289
Mfr. Part No.ADR01ARZ
MYR12.85
Each
units
10V SOIC Fixed ±0.1 % Surface Mount Series 10mA 36 V 9.99 V 10.01 V 8 30 ppm/V 70 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 523-6131
Mfr. Part No.REF196GSZ
MYR15.87
Each
units
3.3V SOIC Fixed ±0.06 % Surface Mount Series 30mA 18 V 3.29 V 3.3 V 8 8 ppm/V 15 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 697-7751
Mfr. Part No.ADR441ARZ
MYR28.20
Each
units
2.5V SOIC Fixed ±0.13 % Surface Mount Series 10mA 20 V 2.497 V 2.503 V 8 20 ppm/V 50 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 168-6078
Mfr. Part No.TL1431ACZ
MYR0.83
Each (In a Bag of 2500)
units
2.5 - 36V TO-92 Adjustable ±0.25 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 4.7 x 3.7 x 4.4mm
RS Stock No. 545-5512
Mfr. Part No.LT1009CZ#PBF
MYR14.76
Each
units
2.5V TO-92 Fixed ±0.2 % Through Hole Shunt - - 2.495 V 2.505 V 3 - 10 mV 4.57 x 3.56 x 4.57mm
RS Stock No. 322-3492
Mfr. Part No.TL1431ACZ
MYR2.54
Each
units
2.5 - 36V TO-92 Adjustable ±0.25 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 4.7 x 3.7 x 4.4mm
RS Stock No. 620-0789
Mfr. Part No.REF02AP
MYR21.756
Each (In a Pack of 5)
units
5V PDIP Fixed ±0.2 % Through Hole Series - 40 V 4.985 V 5.015 V 8 0.01 %/V 0.01 %/mA 9.81 x 6.35 x 4.57mm
RS Stock No. 761-8469
Mfr. Part No.LT1790BCS6-2.5#TRMPBF
MYR13.84
Each
units
2.5V TSOT-23 Fixed ±0.1 % Surface Mount Series - 20 V 2.498 V 2.503 V 6 220 ppm/V 250 ppm/V, 300 ppm/V 2.9 x 1.75 x 0.9mm
RS Stock No. 121-9177
Mfr. Part No.REF3133AIDBZT
MYR7.79
Each (On a Reel of 250)
units
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
RS Stock No. 919-9174
Mfr. Part No.LT1790BCS6-2.5TRMPBF
MYR10.111
Each (On a Reel of 500)
units
2.5V TSOT-23 Fixed ±0.1 % Surface Mount Series - 20 V 2.498 V 2.503 V 6 220 ppm/V 250 ppm/V, 300 ppm/V 2.9 x 1.75 x 0.9mm
RS Stock No. 121-8963
Mfr. Part No.REF02AP
MYR18.48
Each (In a Tube of 50)
units
5V PDIP Fixed ±0.2 % Through Hole Series - 40 V 4.985 V 5.015 V 8 0.01 %/V 0.01 %/mA 9.81 x 6.35 x 4.57mm
RS Stock No. 538-5980
Mfr. Part No.ADR06BRZ
MYR24.48
Each
units
3V SOIC Fixed ±0.1 % Surface Mount Series 10mA 36 V 2.997 V 3 V 8 30 ppm/V 70 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 522-9975
Mfr. Part No.REF195GPZ
MYR20.06
Each
units
5V PDIP Fixed ±0.04 % Through Hole Series 30mA 18 V 4.99 V 5.01 V 8 8 ppm/V 8 ppm/mA 9.27 x 7.24 x 3.43mm
RS Stock No. 858-0598
Mfr. Part No.LTC6655BHMS8-3#PBF
MYR52.39
Each
units
3V MSOP Fixed ±0.025 % Surface Mount Series 20mA 13.2 V - 3 V 8 40 ppm/V 30 ppm/mA 3 x 3 x 0.86mm
RS Stock No. 661-9455
Mfr. Part No.REF3133AIDBZT
MYR11.87
Each
units
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
RS Stock No. 697-8019
Mfr. Part No.REF198GSZ
MYR14.57
Each
units
4.096V SOIC Fixed ±0.05 % Surface Mount Series 30mA 18 V 4.086 V 4.106 V 8 8 ppm/V 8 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 536-1568
Mfr. Part No.LM4040AIM3-5.0/NOPB
MYR8.23
Each
units
5V SOT-23 Fixed ±0.1 % Surface Mount Shunt 15mA - - - 3 - 8 mV 2.92 x 1.3 x 0.93mm
RS Stock No. 411-573
Mfr. Part No.AD580JH
MYR48.83
Each
units
2.5V TO-52 Fixed ±0.4 % Through Hole Series - 40 V - - 3 6 mV 10 mV 5.84 x 5.84 x 3.81mm
RS Stock No. 461-9541
Mfr. Part No.REF3025AIDBZT
MYR5.386
Each (In a Pack of 5)
units
2.5V SOT-23 Fixed ±0.2 % Surface Mount Series 25mA 7 V 2.495 V 2.505 V 3 325 μV/V 100 μV/mA 2.92 x 1.3 x 1mm