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. 797-4829
Mfr. Part No.TL431AQDBZR,215
BrandNexperia
HK$2.431
Each (On a Tape of 50)
units
2.5 - 36V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 165-9765
Mfr. Part No.TL431AQDBZR,215
BrandNexperia
HK$0.852
Each (On a Reel of 3000)
units
2.5 - 36V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 170-4870
Mfr. Part No.TL431BFDT,215
BrandNexperia
HK$0.912
Each (On a Reel of 3000)
units
2.495V SOT-23 Adjustable, Precision 0.5% Surface Mount Shunt 100mA 37 V 2483 mV 2507 mV 3 -2.7 mV/V - 3 x 1.4 x 1mm
RS Stock No. 797-4838
Mfr. Part No.TL431BQDBZR,215
BrandNexperia
HK$2.472
Each (In a Pack of 25)
units
2.5 - 36V SOT-23 Adjustable ±0.5 % Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 169-7200
Mfr. Part No.TL431AMFDT,215
BrandNexperia
HK$0.952
Each (On a Reel of 3000)
units
2.5 - 36V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 797-4816
Mfr. Part No.TL431AIDBZR,215
BrandNexperia
HK$2.472
Each (In a Pack of 50)
units
2.5 - 36V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 165-9799
Mfr. Part No.TL431BMFDT,215
BrandNexperia
HK$0.912
Each (On a Reel of 3000)
units
2.5 - 36V SOT-23 Adjustable ±0.5 % Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 124-2435
Mfr. Part No.TL431BQDBZR,215
BrandNexperia
HK$0.952
Each (On a Reel of 3000)
units
2.5 - 36V SOT-23 Adjustable 0.5% Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 165-9762
Mfr. Part No.TL431AFDT,215
BrandNexperia
HK$0.963
Each (On a Reel of 3000)
units
2.5 - 36V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 797-4841
Mfr. Part No.TL431FDT,215
BrandNexperia
HK$2.235
Each (In a Pack of 50)
units
2.5 - 36V SOT-23 Adjustable ±2.0 % Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 797-4844
Mfr. Part No.TL431IDBZR,215
BrandNexperia
HK$2.441
Each (On a Tape of 50)
units
2.5 - 36V SOT-23 Adjustable ±2.0 % Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 165-9767
Mfr. Part No.TL431IDBZR,215
BrandNexperia
HK$0.749
Each (On a Reel of 3000)
units
2.5 - 36V SOT-23 Adjustable ±2.0 % Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 124-2434
Mfr. Part No.TL431AIDBZR,215
BrandNexperia
HK$0.785
Each (On a Reel of 3000)
units
2.5 - 36V SOT-23 Adjustable 1% Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 797-4826
Mfr. Part No.TL431BIDBZR,215
BrandNexperia
HK$2.472
Each (In a Pack of 25)
units
2.5 - 36V SOT-23 Adjustable ±0.5 % Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 797-4835
Mfr. Part No.TL431BMFDT,215
BrandNexperia
HK$2.575
Each (In a Pack of 30)
units
2.5 - 36V SOT-23 Adjustable ±0.5 % Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 165-9766
Mfr. Part No.TL431FDT,215
BrandNexperia
HK$0.687
Each (On a Reel of 3000)
units
2.5 - 36V SOT-23 Adjustable ±2.0 % Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 170-5436
Mfr. Part No.TL431BFDT,215
BrandNexperia
HK$2.575
Each (In a Pack of 25)
units
2.495V SOT-23 Adjustable, Precision 0.5% Surface Mount Shunt 100mA 37 V 2483 mV 2507 mV 3 -2.7 mV/V - 3 x 1.4 x 1mm
RS Stock No. 797-4813
Mfr. Part No.TL431AFDT,215
BrandNexperia
HK$2.853
Each (In a Pack of 50)
units
2.5 - 36V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 165-9764
Mfr. Part No.TL431BIDBZR,215
BrandNexperia
HK$0.952
Each (On a Reel of 3000)
units
2.5 - 36V SOT-23 Adjustable ±0.5 % Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 797-4848
Mfr. Part No.TL431QDBZR,215
BrandNexperia
HK$2.657
Each (On a Tape of 50)
units
2.5 - 36V SOT-23 Adjustable ±2.0 % Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm