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. 168-6901
Mfr. Part No.TL431ACZ-AP
$0.07
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. 686-4768
Mfr. Part No.TL431ACZ
$0.355
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. 920-8969
Mfr. Part No.TL431ACZ
$0.127
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. 714-7816
Mfr. Part No.TL431ACZ-AP
$0.182
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
$0.103
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. 714-1114
Mfr. Part No.TL431CDT
$0.084
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. 145-8783
Mfr. Part No.TL431CZ
$0.075
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
$0.59
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. 165-6500
Mfr. Part No.TS3431CILT
$0.248
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. 907-4776
Mfr. Part No.TL1431CCT
$0.605
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. 907-4772
Mfr. Part No.TL1431ACCT
$0.545
Each (In a Pack of 20)
units
2.5 - 36V SOT-323 Programmable ±1.0 % Surface Mount Shunt 100mA 36 V 2.5 V 36 V 6 - - 2.2 x 1.35 x 1mm
RS Stock No. 165-6499
Mfr. Part No.TS3431BILT
$0.225
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. 165-8237
Mfr. Part No.TL1431ACCT
$0.59
Each (On a Reel of 3000)
units
2.5 - 36V SOT-323 Programmable ±1.0 % Surface Mount Shunt 100mA 36 V 2.5 V 36 V 6 - - 2.2 x 1.35 x 1mm
RS Stock No. 795-8880
Mfr. Part No.TS3431CILT
$0.296
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. 714-7831
Mfr. Part No.TL431CZ
$0.267
Each (In a Pack of 50)
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. 168-7155
Mfr. Part No.TS431ILT
$0.233
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. 686-4765
Mfr. Part No.TS2431AILT
$0.496
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
RS Stock No. 145-8772
Mfr. Part No.TS2431AILT
$0.192
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. 795-8638
Mfr. Part No.TS3431BILT
$0.312
Each (In a Pack of 25)
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. 795-7017
Mfr. Part No.TS431ILT
$0.267
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