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. 698-9047
Mfr. Part No.MCP1541T-I/TT
BrandMicrochip
R 13.58
Each
units
4.096V SOT-23 Precision 1% Surface Mount Series 20mA 7 V 4.055 V 4.137 V 3 350 μV/V 1.3 mV/mA 2.9 x 1.3 x 0.95mm
RS stock no. 889-5815
Mfr. Part No.MCP1541T-I/TT
BrandMicrochip
R 6.709
Each (On a Reel of 3000)
units
4.096V SOT-23 Precision 1% Surface Mount Series 20mA 7 V 4.055 V 4.137 V 3 350 μV/V 1.3 mV/mA 2.9 x 1.3 x 0.95mm
RS stock no. 681-1083
Mfr. Part No.MCP1541-I/TO
BrandMicrochip
R 13.025
Each (In a Pack of 2)
units
4.096V TO-92 Fixed ±1.0 % Through Hole Series 20mA 7 V 4.055 V 4.137 V 3 350 μV/V 1.3 mV/mA 4.71 x 3.62 x 4.62mm
RS stock no. 165-4661
Mfr. Part No.MCP1541-I/TO
BrandMicrochip
R 9.953
Each (In a Bag of 1000)
units
4.096V TO-92 Fixed ±1.0 % Through Hole Series 20mA 7 V 4.055 V 4.137 V 3 350 μV/V 1.3 mV/mA 4.71 x 3.62 x 4.62mm
RS stock no. 165-4708
Mfr. Part No.MCP1501-10E/SN
BrandMicrochip
R 9.765
Each (In a Tube of 100)
units
1.02V SOIC Fixed ±0.08 % Surface Mount Series 30mA 5.5 V 1.023 V 1.025 V 8 50 ppm/V 40 (Sink) ppm/mA, 70 (Source) ppm/mA 4.9 x 3.9 x 1.5mm
RS stock no. 178-5337
Mfr. Part No.LM4041DYM3-1.2-TR
BrandMicrochip
R 3.597
Each (On a Reel of 3000)
units
1.225V SOT-23 Fixed ±1.0 % Surface Mount Shunt - - - 1.225 V 3 - - 2.92 x 1.3 x 1mm
RS stock no. 111-5568
Mfr. Part No.MCP1501-10E/SN
BrandMicrochip
R 12.828
Each (In a Pack of 10)
units
1.02V SOIC Fixed ±0.08 % Surface Mount Series 30mA 5.5 V 1.023 V 1.025 V 8 50 ppm/V 40 (Sink) ppm/mA, 70 (Source) ppm/mA 4.9 x 3.9 x 1.5mm
RS stock no. 911-2941
Mfr. Part No.LM4041DYM3-1.2-TR
BrandMicrochip
R 3.96
Each (In a Pack of 25)
units
1.225V SOT-23 Fixed ±1.0 % Surface Mount Shunt - - - 1.225 V 3 - - 2.92 x 1.3 x 1mm
RS stock no. 738-6358
Mfr. Part No.MCP1525-I/TO
BrandMicrochip
R 12.78
Each (In a Pack of 5)
units
2.5V TO-92 Fixed ±1.0 % Through Hole Series 20mA 7 V - - 3 350 μV/V 1.3 mV/mA 4.71 x 3.62 x 4.62mm
RS stock no. 144-9108
Mfr. Part No.MCP1501-33E/SN
BrandMicrochip
R 9.765
Each (In a Tube of 100)
units
3.3V SOIC Fixed ±0.08 % Surface Mount Series 30mA 5.5 V 3.29 V 3.3 V 8 50 ppm/V 40 (Sink) ppm/mA, 70 (Source) ppm/mA 4.9 x 3.9 x 1.5mm
RS stock no. 111-5569
Mfr. Part No.MCP1501-33E/SN
BrandMicrochip
R 12.882
Each (In a Pack of 10)
units
3.3V SOIC Fixed ±0.08 % Surface Mount Series 30mA 5.5 V 3.29 V 3.3 V 8 50 ppm/V 40 (Sink) ppm/mA, 70 (Source) ppm/mA 4.9 x 3.9 x 1.5mm
RS stock no. 698-9069
Mfr. Part No.MCP1525T-I/TT
BrandMicrochip
R 21.63
Each
units
2.5V SOT-23 Fixed ±1.0 % Surface Mount Series 20mA 7 V 2.475 V 2.525 V 3 350 μV/V 1.3 mV/mA 2.9 x 1.3 x 0.95mm
RS stock no. 165-3596
Mfr. Part No.MCP1525-I/TO
BrandMicrochip
R 9.683
Each (In a Bag of 1000)
units
2.5V TO-92 Fixed ±1.0 % Through Hole Series 20mA 7 V - - 3 350 μV/V 1.3 mV/mA 4.71 x 3.62 x 4.62mm
RS stock no. 889-5137
Mfr. Part No.MCP1525T-I/TT
BrandMicrochip
R 9.509
Each (On a Reel of 3000)
units
2.5V SOT-23 Fixed ±1.0 % Surface Mount Series 20mA 7 V 2.475 V 2.525 V 3 350 μV/V 1.3 mV/mA 2.9 x 1.3 x 0.95mm
RS stock no. 165-4707
Mfr. Part No.MCP1501-20E/SN
BrandMicrochip
R 9.765
Each (In a Tube of 100)
units
2.04V SOIC Fixed ±0.08 % Surface Mount Series 30mA 5.5 V 2.04 V 2.05 V 8 50 ppm/V 40 (Sink) ppm/mA, 70 (Source) ppm/mA 4.9 x 3.9 x 1.5mm
RS stock no. 144-9107
Mfr. Part No.MCP1501-30E/SN
BrandMicrochip
R 9.765
Each (In a Tube of 100)
units
3V SOIC Fixed ±0.08 % Surface Mount Series 30mA 5.5 V 2.99 V 3 V 8 50 ppm/V 40 (Sink) ppm/mA, 70 (Source) ppm/mA 4.9 x 3.9 x 1.5mm
RS stock no. 177-3273
Mfr. Part No.LM4040CYM3-2.5-TR
BrandMicrochip
R 4.617
Each (In a Pack of 50)
units
2.5V SOT-23 Precision ±0.5% Surface Mount Shunt 15mA 15 V - 2.5 V 3 - - 0.9 x 2.92 x 1.3mm
RS stock no. 144-9110
Mfr. Part No.MCP1501-12E/SN
BrandMicrochip
R 9.765
Each (In a Tube of 100)
units
1.25V SOIC Fixed ±0.08 % Surface Mount Series 30mA 5.5 V 1.24 V 1.25 V 8 50 ppm/V 40 (Sink) ppm/mA, 70 (Source) ppm/mA 4.9 x 3.9 x 1.5mm
RS stock no. 144-9109
Mfr. Part No.MCP1501-18E/SN
BrandMicrochip
R 9.765
Each (In a Tube of 100)
units
1.8V SOIC Fixed ±0.08 % Surface Mount Series 30mA 5.5 V 1.79 V 1.8 V 8 50 ppm/V 40 (Sink) ppm/mA, 70 (Source) ppm/mA 4.9 x 3.9 x 1.5mm
RS stock no. 111-5566
Mfr. Part No.MCP1501-20E/SN
BrandMicrochip
R 12.882
Each (In a Pack of 10)
units
2.04V SOIC Fixed ±0.08 % Surface Mount Series 30mA 5.5 V 2.04 V 2.05 V 8 50 ppm/V 40 (Sink) ppm/mA, 70 (Source) ppm/mA 4.9 x 3.9 x 1.5mm