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. 145-7716
Mfr. Part No.LT1009IS8#PBF
€3.383
Each (In a Tube of 100)
units
2.5V SOIC Fixed ±0.2 % Surface Mount Shunt 10mA - - 2.5 V 8 - - 4.572 x 4.572 x 3.556mm
RS Stock No. 713-9899
Mfr. Part No.NJM431M
€0.452
Each (In a Pack of 5)
units
2.5 - 36V DMP Adjustable ±2.2 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 8 - 0.1 % 5 x 5 x 1.6mm
RS Stock No. 121-8299
Mfr. Part No.REF5045AID
€2.467
Each (In a Tube of 75)
units
4.5V SOIC Fixed ±0.05 % Surface Mount Series 10mA 18 V - - 8 1 ppm/V 50 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 822-5907
Mfr. Part No.LT1634BCS8-1.25#PBF
€4.845
Each (In a Pack of 2)
units
1.25V SOIC Fixed ±0.05 % Surface Mount Shunt 1µA - 1.25 V 5 V 8 - - 5.004 x 3.98 x 1.498mm
RS Stock No. 535-9751
Mfr. Part No.LM431BIM3/NOPB
€0.63
Each (In a Pack of 5)
units
2.5 - 36V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 3 - - 2.92 x 1.3 x 0.93mm
RS Stock No. 122-0297
Mfr. Part No.LM4041DFTA
€0.185
Each (On a Reel of 3000)
units
1.225V SOT-23 Fixed ±1.0 % Surface Mount Shunt 12mA - - - 3 - 8 mV 3.04 x 1.4 x 1.02mm
RS Stock No. 660-6629
Mfr. Part No.REF5050ID
€5.44
Each
units
5V SOIC Fixed ±0.05 % Surface Mount Series 10mA 18 V - - 8 1 ppm/V 30 ppm/mA 4.9 x 3.91 x 1.58mm
RS Stock No. 786-6608
Mfr. Part No.TLV431BLPRAG
€0.438
Each (In a Pack of 20)
units
1.24 - 16V TO-92 Adjustable ±0.5 % Through Hole Shunt 20mA 16 V 1.24 V 16 V 3 - - 5.2 x 4.19 x 5.33mm
RS Stock No. 121-8694
Mfr. Part No.LM336Z-2.5/NOPB
€0.283
Each (In a Box of 1800)
units
2.5V TO-92 Fixed ±4 % Through Hole Shunt 10mA - 2.39 V 2.59 V 3 - 10 mV 5.2 x 4.19 x 5.2mm
RS Stock No. 121-8776
Mfr. Part No.LM4040DIZ-5.0/NOPB
€0.192
Each (In a Box of 1800)
units
5V TO-92 Fixed ±1.0 % Through Hole Shunt 15mA - - - 3 - - 5.2 x 4.19 x 5.2mm
RS Stock No. 533-5799
Mfr. Part No.LM336Z-2.5/NOPB
€0.68
Each
units
2.5V TO-92 Fixed ±4 % Through Hole Shunt 10mA - 2.39 V 2.59 V 3 - 10 mV 5.2 x 4.19 x 5.2mm
RS Stock No. 169-5616
Mfr. Part No.LT1009CLPR
€0.56
Each (On a Reel of 2000)
units
2.5V TO-92 Fixed ±0.2 % Through Hole Shunt 10mA - 2.485 V 2.515 V 3 - 10 mV 4.83 x 3.43 x 3.68mm
RS Stock No. 534-3065
Mfr. Part No.LM4040DIZ-5.0/NOPB
€0.53
Each
units
5V TO-92 Precision 1% Through Hole Shunt 15mA - - - 3 - - 5.2 x 4.19 x 5.2mm
RS Stock No. 759-1837
Mfr. Part No.ADR291GRUZ
€5.18
Each
units
2.5V TSSOP Fixed ±0.24 % Surface Mount Series 5mA 15 V 2.498 V 2.502 V 8 125 ppm/V 125 ppm/mA 4.5 x 3.1 x 1.05mm
RS Stock No. 169-8210
Mfr. Part No.NJM431M
€0.291
Each (In a Tube of 100)
units
2.5 - 36V DMP Adjustable ±2.2 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 8 - 0.1 % 5 x 5 x 1.6mm
RS Stock No. 121-8298
Mfr. Part No.REF5025AID
€2.395
Each (In a Tube of 75)
units
2.5V SOIC Fixed ±0.05 % Surface Mount Series 10mA 18 V - - 8 1 ppm/V 50 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 661-9792
Mfr. Part No.LT1009CLPR
€1.174
Each (In a Pack of 5)
units
2.5V TO-92 Fixed ±0.2 % Through Hole Shunt 10mA - 2.485 V 2.515 V 3 - 10 mV 4.83 x 3.43 x 3.68mm
RS Stock No. 922-2498
Mfr. Part No.REF3030AIDBZT
€0.849
Each (On a Reel of 250)
units
3V SOT-23 Fixed ±0.2 % Surface Mount Series 25mA 7 V 2.994 V 3 V 3 375 μV/V 100 μV/mA 2.92 x 1.3 x 1mm
RS Stock No. 162-5830
Mfr. Part No.LM4041C12IDBZT
€0.612
Each (On a Reel of 250)
units
1.225V SOT-23 Fixed ±0.5 % Surface Mount Shunt 12mA - - - 3 - 6 mV 2.92 x 1.3 x 1mm
RS Stock No. 162-5842
Mfr. Part No.LT1009CLPE3
€0.56
Each (In a Bag of 1000)
units
2.5V TO-92 Fixed ±0.2 % Through Hole Shunt 10mA - 2.485 V 2.515 V 3 - 10 mV 4.83 x 3.43 x 3.68mm
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