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. 698-9069
Mfr. Part No.MCP1525T-I/TT
BrandMicrochip
€0.65
Each
units
2.5V SOT-23 Fixed ±1.0 % Surface Mount Series 20mA 7 V 2.475 V 2.525 V 3 350 μV/V 1.3 mV/mA 2.9 x 1.3 x 0.95mm
RS Stock No. 889-5137
Mfr. Part No.MCP1525T-I/TT
BrandMicrochip
€0.491
Each (On a Reel of 3000)
units
2.5V SOT-23 Fixed ±1.0 % Surface Mount Series 20mA 7 V 2.475 V 2.525 V 3 350 μV/V 1.3 mV/mA 2.9 x 1.3 x 0.95mm
RS Stock No. 145-1010
Mfr. Part No.TL431ACLP
€0.112
Each (In a Bag of 1000)
units
2.5 - 36V TO-92 Adjustable ±1.0 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 4.83 x 3.43 x 3.68mm
RS Stock No. 681-1083
Mfr. Part No.MCP1541-I/TO
BrandMicrochip
€0.65
Each (In a Pack of 2)
units
4.096V TO-92 Fixed ±1.0 % Through Hole Series 20mA 7 V 4.055 V 4.137 V 3 350 μV/V 1.3 mV/mA 4.71 x 3.62 x 4.62mm
RS Stock No. 165-4661
Mfr. Part No.MCP1541-I/TO
BrandMicrochip
€0.491
Each (In a Bag of 1000)
units
4.096V TO-92 Fixed ±1.0 % Through Hole Series 20mA 7 V 4.055 V 4.137 V 3 350 μV/V 1.3 mV/mA 4.71 x 3.62 x 4.62mm
RS Stock No. 428-436
Mfr. Part No.TL431ACLP
€0.40
Each
units
2.5 - 36V TO-92 Adjustable ±1.0 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 4.83 x 3.43 x 3.68mm
RS Stock No. 661-9827
Mfr. Part No.TL431CLPR
€0.236
Each (In a Pack of 10)
units
2.5 - 36V TO-92 Adjustable ±2.0 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 4.83 x 3.43 x 3.68mm
RS Stock No. 169-5617
Mfr. Part No.TL431CLPR
€0.078
Each (On a Reel of 2000)
units
2.5 - 36V TO-92 Adjustable ±2.0 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 4.83 x 3.43 x 3.68mm
RS Stock No. 160-0689
Mfr. Part No.ADR4525BRZ
€5.899
Each (In a Tube of 98)
units
2.5V SOIC Fixed ±0.02 % Surface Mount Series 10mA 15 V - 2.5 V 8 10 ppm/V 120 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 163-2402
Mfr. Part No.LM285Z-2.5G
€0.217
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. 802-3884
Mfr. Part No.ADR4525BRZ
€7.09
Each
units
2.5V SOIC Fixed ±0.02 % Surface Mount Series 10mA 15 V - 2.5 V 8 10 ppm/V 120 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 463-492
Mfr. Part No.LM285Z-2.5G
€0.473
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. 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. 404-320
Mfr. Part No.REF5045AID
€2.90
Each
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. 497-2331
Mfr. Part No.ADR420ARZ
€5.48
Each
units
2.048V SOIC Fixed ±0.15 % Surface Mount Series 10mA 18 V 2.045 V 2.051 V 8 35 ppm/V 70 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 809-5374
Mfr. Part No.TL431AILP
€0.334
Each (In a Pack of 5)
units
2.5 - 36V TO-92 Adjustable ±1.0 % Through Hole Shunt 100mA - - 36 V 3 - - 5.21 x 4.19 x 5.34mm
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. 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. 160-0697
Mfr. Part No.ADR4550BRZ
€5.942
Each (In a Tube of 98)
units
5V SOIC Fixed ±0.02 % Surface Mount Series 10mA 15 V - - 8 10 ppm/V 120 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 806-4689
Mfr. Part No.LM431AIZ
€0.213
Each (In a Pack of 50)
units
2.5 - 36V TO-92 Adjustable ±2.0 % Through Hole Shunt 100mA - 2.5 (Cathode) V 36 V 3 - - 5.2 x 4.19 x 5.33mm
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