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. 671-0292
Mfr. Part No.LM336Z5
PHP19.43
Each (In a Pack of 5)
units
5V TO-92 Programmable ±1.0 % Through Hole Shunt 400mA - 4.8 V 5.2 V 3 - 20 mV 4.58 x 3.86 x 4.58mm
RS Stock No. 166-1784
Mfr. Part No.LM336Z5
PHP4.94
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
RS Stock No. 163-2419
Mfr. Part No.LM385Z-2.5G
PHP13.171
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. 739-0448
Mfr. Part No.LM336Z25
PHP17.39
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. 463-246
Mfr. Part No.TL431CLPG
PHP11.478
Each (In a Pack of 50)
units
2.5 - 36V TO-92 Adjustable ±2.2 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 5.2 x 4.19 x 5.33mm
RS Stock No. 463-492
Mfr. Part No.LM285Z-2.5G
PHP28.929
Each (In a Pack of 10)
units
2.5V TO-92 Fixed ±1.5 % Through Hole Shunt 20mA - 2.462 V 2.538 V 3 - 10 mV 5.2 x 4.19 x 5.33mm
RS Stock No. 145-3275
Mfr. Part No.TL431CLPG
PHP4.288
Each (In a Bag of 2000)
units
2.5 - 36V TO-92 Adjustable ±2.2 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 5.2 x 4.19 x 5.33mm
RS Stock No. 163-2402
Mfr. Part No.LM285Z-2.5G
PHP15.053
Each (In a Bag of 2000)
units
2.5V TO-92 Fixed ±1.5 % Through Hole Shunt 20mA - 2.462 V 2.538 V 3 - 10 mV 5.2 x 4.19 x 5.33mm
RS Stock No. 166-3795
Mfr. Part No.LM336Z25X
PHP5.871
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. 739-0300
Mfr. Part No.KA431AZTA
PHP12.29
Each (In a Pack of 10)
units
2.5 - 36V TO-92 Programmable ±1.0 % Through Hole Shunt 100mA - 2.5 V 36 V 3 - - 4.58 x 3.86 x 4.58mm
RS Stock No. 864-7878
Mfr. Part No.TL431ACDR2G
PHP14.342
Each (In a Pack of 50)
units
2.5 - 36V SOIC Programmable ±1.0 % Surface Mount Shunt 100mA - 2.44 V 36 V 8 53 mV 25 mV 5 x 4 x 1.5mm
RS Stock No. 805-4588
Mfr. Part No.TL431IDG
PHP7.589
Each (In a Pack of 50)
units
2.5 - 36V SOIC Programmable ±1.0 % Surface Mount Shunt 100mA - - 36 V 8 53 mV 25 mV 5 x 4 x 1.5mm
RS Stock No. 806-4673
Mfr. Part No.LM336Z25X
PHP15.394
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. 163-0321
Mfr. Part No.TL431ACDR2G
PHP6.547
Each (On a Reel of 2500)
units
2.5 - 36V SOIC Programmable ±1.0 % Surface Mount Shunt 100mA - 2.44 V 36 V 8 53 mV 25 mV 5 x 4 x 1.5mm
RS Stock No. 805-4581
Mfr. Part No.TL431BCDG
PHP10.048
Each (In a Pack of 50)
units
2.5 - 36V SOIC Fixed ±0.4 % Surface Mount Shunt 100mA - - 36 V 8 53 mV 25 mV 5 x 4 x 1.5mm
RS Stock No. 805-6758
Mfr. Part No.TL431ACDG
PHP8.787
Each (In a Pack of 50)
units
2.5 - 36V SOIC Programmable ±1.0 % Surface Mount Shunt 100mA - - 36 V 8 53 mV 25 mV 5 x 4 x 1.5mm
RS Stock No. 166-2430
Mfr. Part No.KA431AZTA
PHP3.10
Each (On a Tape of 2000)
units
2.5 - 36V TO-92 Programmable ±1.0 % Through Hole Shunt 100mA - 2.5 V 36 V 3 - - 4.58 x 3.86 x 4.58mm
RS Stock No. 166-2589
Mfr. Part No.LM336Z25
PHP4.62
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. 463-498
Mfr. Part No.LM385Z-2.5G
PHP25.576
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. 781-4386
Mfr. Part No.NCP431AISNT1G
PHP9.289
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