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. 661-9754
Mfr. Part No.TLE2426CP
kr 28,636
Each (In a Pack of 5)
Units
- PDIP Adjustable - Through Hole Series 20mA 40 V 1.98 V 20.2 V 8 - - 9.81 x 6.35 x 4.57mm
RS Stock No. 145-5770
Mfr. Part No.TLE2426CP
kr 23,713
Each (In a Tube of 50)
Units
- PDIP Adjustable - Through Hole Series 20mA 40 V 1.98 V 20.2 V 8 - - 9.81 x 6.35 x 4.57mm
RS Stock No. 121-8557
Mfr. Part No.REF102BP
kr 149,74
Each (In a Tube of 50)
Units
10V PDIP Precision 5mV Through Hole Series - 40 V 9.995 V 10.005 V 8 1 ppm/V 20 ppm/mA 9.81 x 6.35 x 4.57mm
RS Stock No. 921-6954
Mfr. Part No.LM431AIM3/NOPB
kr 6,398
Each (On a Reel of 1000)
Units
2.5 - 36V SOT-23 Adjustable ±2.0 % Surface Mount Shunt 100mA - 2.44 V 2.55 V 3 - - 2.92 x 1.3 x 0.93mm
RS Stock No. 814-3767
Mfr. Part No.REF3333AIDBZT
kr 39,506
Each (In a Pack of 5)
Units
3.3V SOT-23 Fixed ±0.15 % Surface Mount Series 30mA 5.5 V - - 3 30 ppm/V 20 ppm/V 3.04 x 1.4 x 1.02mm
RS Stock No. 535-9717
Mfr. Part No.LM4041DIM3-ADJ/NOPB
kr 10,22
Each (In a Pack of 5)
Units
1.233 - 10V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 12mA - 1.24 V 10 V 3 - 2 mV 2.92 x 1.3 x 0.93mm
RS Stock No. 660-5626
Mfr. Part No.REF102CP
kr 200,03
Each
Units
10V PDIP Fixed ±0.025 % Through Hole Series - 40 V 9.998 V 10.003 V 8 1 ppm/V 20 ppm/mA 9.81 x 6.35 x 4.57mm
RS Stock No. 889-5815
Mfr. Part No.MCP1541T-I/TT
BrandMicrochip
kr 7,588
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. 162-5920
Mfr. Part No.TLE2426IP
kr 15,808
Each (In a Tube of 50)
Units
- PDIP Adjustable - Through Hole Series 20mA 40 V 1.98 V 20.2 V 8 - - 9.81 x 6.35 x 4.57mm
RS Stock No. 761-5937
Mfr. Part No.LM431AIM3/NOPB
kr 10,665
Each (In a Pack of 10)
Units
2.5 - 36V SOT-23 Adjustable ±2.0 % Surface Mount Shunt 100mA - 2.44 V 2.55 V 3 - - 2.92 x 1.3 x 0.93mm
RS Stock No. 461-9428
Mfr. Part No.REF102BP
kr 173,62
Each
Units
10V PDIP Fixed ±0.05 % Through Hole Series - 40 V 9.995 V 10.005 V 8 1 ppm/V 20 ppm/mA 9.81 x 6.35 x 4.57mm
RS Stock No. 923-3616
Mfr. Part No.REF102CP
kr 185,129
Each (In a Tube of 50)
Units
10V PDIP Fixed ±0.025 % Through Hole Series - 40 V 9.998 V 10.003 V 8 1 ppm/V 20 ppm/mA 9.81 x 6.35 x 4.57mm
RS Stock No. 184-1119
Mfr. Part No.TLV431ASNT1G
Brandonsemi
kr 1,848
Each (On a Reel of 3000)
Units
1.24V TSOP Precision, Programmable ±1 %, ±2 % Surface Mount Series/Shunt 20mA 16 V 1.24 V 16 V 5 - - 3.15 x 1.65 x 1mm
RS Stock No. 121-9399
Mfr. Part No.REF3333AIDBZT
kr 21,705
Each (On a Reel of 250)
Units
3.3V SOT-23 Fixed ±0.15 % Surface Mount Series 30mA 5.5 V - - 3 30 ppm/V 20 ppm/V 3.04 x 1.4 x 1.02mm
RS Stock No. 184-1482
Mfr. Part No.TLV431ASNT1G
Brandonsemi
kr 4,462
Each (In a Pack of 25)
Units
1.24V TSOP Precision, Programmable ±1 %, ±2 % Surface Mount Series/Shunt 20mA 16 V 1.24 V 16 V 5 - - 3.15 x 1.65 x 1mm
RS Stock No. 698-9047
Mfr. Part No.MCP1541T-I/TT
BrandMicrochip
kr 9,35
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. 522-8405
Mfr. Part No.REF43GSZ
kr 136,08
Each
Units
2.5V SOIC Fixed ±0.1 % Surface Mount Series 80mA 40 V 2.498 V 2.503 V 8 2 ppm/V 20 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 168-6826
Mfr. Part No.TL431CDT
kr 1,84
Each (On a Reel of 2500)
Units
2.5 - 36V SOIC Adjustable ±2.0 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 8 - - 4.9 x 3.9 x 1.25mm
New
RS Stock No. 248-5859
Mfr. Part No.TS3333ACR
kr 9,434
Each (In a Pack of 5)
Units
3.3V SOT323-3L Fixed ±0.15% Surface Mount - - - - - - - - -
RS Stock No. 165-8319
Mfr. Part No.AZ431LANTR-G1
kr 1,222
Each (On a Reel of 3000)
Units
1.24V SOT-23 Adjustable ±0.5 % Surface Mount Shunt 100mA 18 V 1.24 V 18 V 3 - - 3 x 1.4 x 1.1mm