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. 166-3795
Mfr. Part No.LM336Z25X
$0.198
Each (On a Reel of 2000)
units
2.5V TO-92 Programmable ±1.0 % Through Hole Shunt 15 (Reverse)mA - - - 3 - - 5.2 x 4.19 x 5.33mm
RS Stock No. 166-2589
Mfr. Part No.LM336Z25
$0.179
Each (In a Bag of 10000)
units
2.5V TO-92 Programmable ±1.0 % Through Hole Shunt 15 (Reverse)mA - - - 3 - - 5.2 x 4.19 x 5.33mm
RS Stock No. 739-0448
Mfr. Part No.LM336Z25
$0.652
Each (In a Pack of 5)
units
2.5V TO-92 Fixed ±1.0 % Through Hole Shunt - - 2.44 V 2.54 V 3 - 10 mV 4.58 x 3.86 x 4.58mm
RS Stock No. 806-4673
Mfr. Part No.LM336Z25X
$0.415
Each (In a Pack of 50)
units
2.5V TO-92 Programmable ±1.0 % Through Hole Shunt 15 (Reverse)mA - - - 3 - - 5.2 x 4.19 x 5.33mm
RS Stock No. 806-4049
Mfr. Part No.LM431SBCMFX
$0.184
Each (On a Tape of 100)
units
2.5 - 36V SOT-23F Adjustable ±1.0 % Surface Mount Shunt 100 (Cathode)mA - 2.5 (Cathode) V 36 V 3 - - 3 x 1.7 x 1mm
RS Stock No. 166-3103
Mfr. Part No.LM431SBCMFX
$0.125
Each (On a Reel of 3000)
units
2.5 - 36V SOT-23F Adjustable ±1.0 % Surface Mount Shunt 100 (Cathode)mA - 2.5 (Cathode) V 36 V 3 - - 3 x 1.7 x 1mm
RS Stock No. 145-2928
Mfr. Part No.LM385BD-2.5G
$0.479
Each (In a Tube of 98)
units
2.5V SOIC Fixed ±1.5 % Surface Mount Shunt - - - - 8 - - 5 x 4 x 1.5mm
RS Stock No. 163-2419
Mfr. Part No.LM385Z-2.5G
$0.48
Each (In a Bag of 2000)
units
2.5V TO-92 Fixed ±3 % Through Hole Shunt 20mA - 2.425 V 2.575 V 3 - 20 mV 5.2 x 4.19 x 5.33mm
RS Stock No. 463-498
Mfr. Part No.LM385Z-2.5G
$0.79
Each (In a Pack of 10)
units
2.5V TO-92 Fixed ±3 % Through Hole Shunt 20mA - 2.425 V 2.575 V 3 - 20 mV 5.2 x 4.19 x 5.33mm
RS Stock No. 805-1387
Mfr. Part No.LM385BD-2.5G
$0.671
Each (In a Pack of 25)
units
2.5V SOIC Fixed ±1.5 % Surface Mount Shunt - - - - 8 - - 5 x 4 x 1.5mm
RS Stock No. 166-1970
Mfr. Part No.LM431SCCMFX
$0.123
Each (On a Reel of 3000)
units
2.5 - 36V SOT-23F Adjustable ±0.5 % Surface Mount Shunt 100 (Cathode)mA - 2.5 (Cathode) V 36 V 3 - - 3 x 1.7 x 1mm
RS Stock No. 688-9332
Mfr. Part No.TL431BIDR2G
$0.295
Each (In a Pack of 2)
units
2.5 - 36V SOIC Adjustable ±0.4 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 8 - - 5 x 4 x 1.5mm
RS Stock No. 781-4165
Mfr. Part No.LM4040DTB-250GT3
$0.793
Each (In a Pack of 10)
units
2.5V SOT-23 Fixed ±1.0 % Surface Mount Shunt 15mA - - 2.5 V 3 - - 3.04 x 1.04 x 1.12mm
RS Stock No. 781-4386
Mfr. Part No.NCP431AISNT1G
$0.503
Each (On a Tape of 50)
units
2.5 - 36V SOT-23 Programmable ±1.0 % Surface Mount Shunt 100mA - - 36 V 3 - - 3.04 x 1.04 x 1.01mm
RS Stock No. 688-8770
Mfr. Part No.LM385D-1.2G
$1.295
Each (In a Pack of 2)
units
1.235V SOIC Fixed ±2.0 % Surface Mount Shunt 20mA - 1.205 V 1.26 V 8 - 20 mV 5 x 4 x 1.5mm
RS Stock No. 145-3880
Mfr. Part No.TL431CDR2G
$0.17
Each (On a Reel of 2500)
units
2.5 - 36V SOIC Adjustable ±2.2 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 8 - - 5 x 4 x 1.5mm
RS Stock No. 122-0101
Mfr. Part No.TL431BCDR2G
$0.264
Each (On a Reel of 2500)
units
2.5 - 36V SOIC Adjustable ±0.4 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 8 - - 5 x 4 x 1.5mm
RS Stock No. 184-1117
Mfr. Part No.TL431AIDG
$0.477
Each (In a Tube of 98)
units
2.49V SOIC Adjustable - Surface Mount Series/Shunt 100mA 2.52 V - 36 V 8 - - 5 x 4 x 1.5mm
RS Stock No. 774-3697
Mfr. Part No.TL431AILPG
$0.633
Each (In a Pack of 10)
units
2.5 - 36V TO-92 Programmable ±4 % Through Hole Shunt 100mA 37 V 2.495 V 36 V 3 53 mV 25 mV 5.2 x 4.19 x 5.33mm
RS Stock No. 166-1784
Mfr. Part No.LM336Z5
$0.198
Each (In a Bag of 10000)
units
5V TO-92 Programmable ±1.0 % Through Hole Shunt 15 (Reverse)mA - 4 V 6 V 3 - - 5.2 x 4.19 x 5.33mm