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. 714-1114
Mfr. Part No.TL431CDT
$0.092
Each (In a Pack of 20)
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
RS Stock No. 920-8969
Mfr. Part No.TL431ACZ
$0.142
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. 686-4768
Mfr. Part No.TL431ACZ
$0.41
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. 168-6901
Mfr. Part No.TL431ACZ-AP
$0.088
Each (On a Tape of 2000)
units
2.5 - 36V TO-92AP Adjustable ±1.0 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 5 x 4 x 5mm
RS Stock No. 714-7816
Mfr. Part No.TL431ACZ-AP
$0.23
Each (In a Pack of 50)
units
2.5 - 36V TO-92AP Adjustable ±1.0 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 5 x 4 x 5mm
RS Stock No. 168-6826
Mfr. Part No.TL431CDT
$0.125
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
RS Stock No. 168-7155
Mfr. Part No.TS431ILT
$0.282
Each (On a Reel of 3000)
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. 714-7828
Mfr. Part No.TL431AIZ
$0.409
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. 165-6542
Mfr. Part No.TS2431ILT
$0.235
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. 145-8772
Mfr. Part No.TS2431AILT
$0.213
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. 178-5185
Mfr. Part No.TL431AIZ
$0.167
Each (On a Reel 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. 795-8650
Mfr. Part No.TL1431AIDT
$0.585
Each (On a Tape of 10)
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. 165-6770
Mfr. Part No.TS4040DILT-2.5
$0.377
Each (On a Reel of 3000)
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. 714-7825
Mfr. Part No.TL431AIDT
$0.194
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. 145-8783
Mfr. Part No.TL431CZ
$0.095
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. 795-8943
Mfr. Part No.TS2431ILT
$0.376
Each (On a Tape of 50)
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. 795-8880
Mfr. Part No.TS3431CILT
$0.303
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. 168-8903
Mfr. Part No.TS432ILT
$0.437
Each (On a Reel of 3000)
units
1.24 - 10V SOT-23 Adjustable ±1.0 % Surface Mount Shunt - - 1.24 V 10 V 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 165-8238
Mfr. Part No.TL1431CCT
$0.655
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. 686-4765
Mfr. Part No.TS2431AILT
$0.546
Each (In a Pack of 25)
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