Voltage References

Voltage references are electronic devices that provide a fixed voltage. They provide a constant voltage regardless of external factors like the load on the device or fluctuations in the power supply.


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. 


Types of voltage references

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%. 


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 analog-to-digital converters. They are also used in scientific applications and in medical equipment where voltage variations need to be tested regularly. 


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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. 168-6902
Mfr. Part No.TL431AIZT
PHP5.09
Each (On a Reel of 2000)
units
2.5 - 36V TO-92 Adjustable ±1.0 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 4.83 x 3.43 x 3.68mm
RS Stock No. 714-7822
Mfr. Part No.TL431AIZT
PHP14.23
Each (In a Pack of 20)
units
2.5 - 36V TO-92 Adjustable ±1.0 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 4.7 x 3.7 x 4.4mm
RS Stock No. 795-8880
Mfr. Part No.TS3431CILT
PHP24.41
Each (On a Tape of 25)
units
1.24 - 24V SOT-23 Adjustable ±0.25 % Surface Mount Shunt 100mA - 1.24 V 24 V 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 165-6500
Mfr. Part No.TS3431CILT
PHP9.924
Each (On a Reel of 3000)
units
1.24 - 24V SOT-23 Adjustable ±0.25 % Surface Mount Shunt 100mA - 1.24 V 24 V 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 165-6542
Mfr. Part No.TS2431ILT
PHP8.09
Each (On a Reel of 3000)
units
2.5 - 24V SOT-23 Adjustable ±2.0 % Surface Mount Shunt 100mA - 2.5 V 24 V 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 686-4768
Mfr. Part No.TL431ACZ
PHP14.23
Each (In a Pack of 50)
units
2.5 - 36V TO-92 Adjustable ±1.0 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 4.7 x 3.7 x 4.4mm
RS Stock No. 714-1105
Mfr. Part No.TL431ACDT
PHP14.54
Each (In a Pack of 20)
units
2.5 - 36V SOIC Adjustable ±1.0 % Surface Mount Shunt - - - - 8 - - -
RS Stock No. 795-7048
Mfr. Part No.TS4040DILT-2.5
PHP26.398
Each (On a Tape of 25)
units
2.5V SOT-23 Fixed ±1.0 % Surface Mount Shunt 15mA - 2.475 V 2.525 V 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 322-3492
Mfr. Part No.TL1431ACZ
PHP23.10
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. 145-8783
Mfr. Part No.TL431CZ
PHP5.039
Each (On a Reel of 2500)
units
2.5 - 36V TO-92 Adjustable ±2.0 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 4.7 x 3.7 x 4.4mm
RS Stock No. 165-8238
Mfr. Part No.TL1431CCT
PHP12.587
Each (On a Reel of 3000)
units
2.5 - 36V SOT-323 Programmable ±2.0 % Surface Mount Shunt 100mA 36 V 2.5 V 36 V 6 - - 2.2 x 1.35 x 1mm
RS Stock No. 145-8772
Mfr. Part No.TS2431AILT
PHP7.30
Each (On a Reel of 3000)
units
2.5 - 24V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 25 V 2.5 V 24 V 3 - - 2.9 x 1.3 x 0.95mm
RS Stock No. 920-8969
Mfr. Part No.TL431ACZ
PHP4.99
Each (In a Bag of 2500)
units
2.5 - 36V TO-92 Adjustable ±1.0 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 4.7 x 3.7 x 4.4mm
RS Stock No. 165-6499
Mfr. Part No.TS3431BILT
PHP9.262
Each (On a Reel of 3000)
units
1.24 - 24V SOT-23 Adjustable ±0.5 % Surface Mount Shunt 100mA - 1.24 V 24 V 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 907-4776
Mfr. Part No.TL1431CCT
PHP28.30
Each (In a Pack of 20)
units
2.5 - 36V SOT-323 Programmable ±2.0 % Surface Mount Shunt 100mA 36 V 2.5 V 36 V 6 - - 2.2 x 1.35 x 1mm
RS Stock No. 714-7825
Mfr. Part No.TL431AIDT
PHP14.54
Each (In a Pack of 20)
units
2.5 - 36V SOIC Adjustable ±1.0 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 8 - - 4.9 x 3.9 x 1.25mm
RS Stock No. 168-7272
Mfr. Part No.TL1431AIDT
PHP6.956
Each (On a Reel of 2500)
units
2.5 - 36V SOIC Adjustable ±0.25 % Surface Mount Shunt 100mA - 2.5 V 36 V 8 - - 5 x 4 x 1.5mm
RS Stock No. 795-7017
Mfr. Part No.TS431ILT
PHP26.88
Each (In a Pack of 10)
units
1.24 - 6V SOT-23 Adjustable ±2.0 % Surface Mount Shunt 30mA - 1.215 V 1.265 V 5 - - 3 x 1.75 x 1.3mm
RS Stock No. 877-3052
Mfr. Part No.TS431AILT
PHP25.816
Each (In a Pack of 20)
units
1.24 - 6V SOT-23 Adjustable ±2.0 % Surface Mount Shunt - - 1.228 V 1.252 V 5 - - 3 x 1.75 x 1.3mm
RS Stock No. 165-8207
Mfr. Part No.TL1431ACL5T
PHP12.587
Each (On a Reel of 3000)
units
2.5 - 36V SOT-23 Programmable ±1.0 % Surface Mount Shunt 100mA 36 V 2.5 V 36 V 5 - - 3.05 x 1.75 x 1.3mm