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. 862-4976
Mfr. Part No.TL431ACLPG
R 6.754
Each (In a Pack of 50)
units
2.5 - 36V TO-92 Programmable ±1.0 % Through Hole Shunt 100mA - - 36 V 3 53 mV 25 mV 5.2 x 4.19 x 5.33mm
RS stock no. 163-0322
Mfr. Part No.TL431ACLPG
R 3.233
Each (In a Bag of 2000)
units
2.5 - 36V TO-92 Programmable ±1.0 % Through Hole Shunt 100mA - - 36 V 3 53 mV 25 mV 5.2 x 4.19 x 5.33mm
RS stock no. 862-4922
Mfr. Part No.LM385BZ-1.2G
R 8.837
Each (In a Pack of 25)
units
1.235V TO-92 Fixed ±1.0 % Through Hole Shunt - - - - 3 - - 5.2 x 4.19 x 5.33mm
RS stock no. 166-1784
Mfr. Part No.LM336Z5
R 1.625
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. 162-9967
Mfr. Part No.LM385BZ-1.2G
R 4.524
Each (In a Bag of 2000)
units
1.235V TO-92 Fixed ±1.0 % Through Hole Shunt - - - - 3 - - 5.2 x 4.19 x 5.33mm
RS stock no. 671-0292
Mfr. Part No.LM336Z5
R 6.236
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. 463-482
Mfr. Part No.LM385Z-1.2G
R 8.053
Each (In a Pack of 10)
units
1.235V TO-92 Fixed ±2.0 % Through Hole Shunt 20mA - 1.205 V 1.26 V 3 - 20 mV 5.2 x 4.19 x 5.33mm
RS stock no. 463-846
Mfr. Part No.LM385D-2.5G
R 10.416
Each (In a Pack of 10)
units
2.5V SOIC Fixed ±3 % Surface Mount Shunt 20mA - 2.425 V 2.575 V 8 - 20 mV 5 x 4 x 1.5mm
RS stock no. 101-8305
Mfr. Part No.LM285Z-1.2G
R 4.891
Each (In a Bag of 2000)
units
1.235V TO-92 Fixed ±1.0 % Through Hole Shunt 20mA - 1.223 V 1.247 V 3 - 10 mV 5.2 x 4.19 x 5.33mm
RS stock no. 163-2418
Mfr. Part No.LM385D-2.5G
R 9.466
Each (In a Tube of 98)
units
2.5V SOIC Fixed ±3 % Surface Mount Shunt 20mA - 2.425 V 2.575 V 8 - 20 mV 5 x 4 x 1.5mm
RS stock no. 463-509
Mfr. Part No.LM285Z-1.2G
R 9.628
Each (In a Pack of 10)
units
1.235V TO-92 Fixed ±1.0 % Through Hole Shunt 20mA - 1.223 V 1.247 V 3 - 10 mV 5.2 x 4.19 x 5.33mm
RS stock no. 101-8304
Mfr. Part No.LM385Z-1.2G
R 4.125
Each (In a Bag of 2000)
units
1.235V TO-92 Fixed ±2.0 % Through Hole Shunt 20mA - 1.205 V 1.26 V 3 - 20 mV 5.2 x 4.19 x 5.33mm
RS stock no. 162-8884
Mfr. Part No.LM285Z-1.2RAG
R 4.988
Each (On a Reel of 2000)
units
1.235V TO-92 Fixed ±1.0 % Through Hole Shunt - - - - 3 - - 5.2 x 4.19 x 5.33mm
RS stock no. 805-1330
Mfr. Part No.LM285Z-1.2RAG
R 9.608
Each (In a Pack of 20)
units
1.235V TO-92 Fixed ±1.0 % Through Hole Shunt - - - - 3 - - 5.2 x 4.19 x 5.33mm
RS stock no. 808-3965
Mfr. Part No.LM385D-1.2R2G
R 8.606
Each (On a Tape of 25)
units
1.235V SOIC Fixed ±2% Surface Mount Shunt - - 1.247 V 1.223 V 8 - - 5 x 4 x 1.5mm
RS stock no. 163-0440
Mfr. Part No.LM385D-1.2R2G
R 3.764
Each (On a Reel of 2500)
units
1.235V SOIC Fixed ±2% Surface Mount Shunt - - 1.247 V 1.223 V 8 - - 5 x 4 x 1.5mm
RS stock no. 166-3615
Mfr. Part No.LM431AIZ
R 0.999
Each (In a Bag of 10000)
units
2.5 - 36V TO-92 Adjustable ±2.0 % Through Hole Shunt 100 (Cathode)mA - 2.5 (Cathode) V 36 V 3 - - 5.2 x 4.19 x 5.33mm
RS stock no. 806-4689
Mfr. Part No.LM431AIZ
R 1.98
Each (In a Pack of 50)
units
2.5 - 36V TO-92 Adjustable ±2.0 % Through Hole Shunt 100 (Cathode)mA - 2.5 (Cathode) V 36 V 3 - - 5.2 x 4.19 x 5.33mm
RS stock no. 166-3530
Mfr. Part No.KA431LZTA
R 1.161
Each (On a Tape of 2000)
units
2.5 - 36V TO-92 Programmable ±0.5 % Through Hole Shunt - - - 36 V 3 - - 5.2 x 4.19 x 5.33mm
RS stock no. 163-2419
Mfr. Part No.LM385Z-2.5G
R 4.157
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