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. 533-5799
Mfr. Part No.LM336Z-2.5/NOPB
TWD26.00
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. 121-8694
Mfr. Part No.LM336Z-2.5/NOPB
TWD9.90
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. 398-849
Mfr. Part No.TS431BCX RFG
TWD11.60
Each (In a Pack of 50)
units
2.5 - 36V SOT-23 Adjustable 0.5% Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3.05 x 1.4 x 0.95mm
RS Stock No. 169-8955
Mfr. Part No.TS431BCX RFG
TWD3.30
Each (On a Reel of 3000)
units
2.5 - 36V SOT-23 Adjustable 0.5% Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3.05 x 1.4 x 0.95mm
RS Stock No. 165-9766
Mfr. Part No.TL431FDT,215
BrandNexperia
TWD2.50
Each (On a Reel of 3000)
units
2.5 - 36V SOT-23 Adjustable ±2.0 % Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 797-4841
Mfr. Part No.TL431FDT,215
BrandNexperia
TWD8.40
Each (In a Pack of 50)
units
2.5 - 36V SOT-23 Adjustable ±2.0 % Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 739-0448
Mfr. Part No.LM336Z25
TWD13.00
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. 170-9003
Mfr. Part No.AP431IAZTR-G1
TWD3.10
Each (On a Tape of 2000)
units
2.5V TO-92 Adjustable ±0.5 % Through Hole Shunt 100mA 36 V 2.5 V 36 V 3 - - 4.8 x 3.8 x 4.7mm
RS Stock No. 921-0546
Mfr. Part No.AP431IAZTR-G1
TWD10.20
Each (In a Pack of 50)
units
2.5V TO-92 Adjustable ±0.5 % Through Hole Shunt 100mA 36 V 2.5 V 36 V 3 - - 4.8 x 3.8 x 4.7mm
RS Stock No. 100-0659
Mfr. Part No.ISL21080CIH325Z-TK
BrandIntersil
TWD59.80
Each (On a Tape of 5)
units
2.5V SOT-23 Fixed ±0.2 % Surface Mount Series ±7mA 5.5 V - 2.5 V 3 350 μV/V 350 μV/mA 2.92 x 1.3 x 0.95mm
RS Stock No. 661-9824
Mfr. Part No.TL431CLPM
TWD10.20
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. 162-5904
Mfr. Part No.TL431CLPM
TWD3.60
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. 146-2383
Mfr. Part No.ISL21080CIH325Z-TK
BrandIntersil
TWD34.40
Each (On a Reel of 1000)
units
2.5V SOT-23 Fixed ±0.2 % Surface Mount Series ±7mA 5.5 V - 2.5 V 3 350 μV/V 350 μV/mA 2.92 x 1.3 x 0.95mm
RS Stock No. 912-7220
Mfr. Part No.AD587JRZ
TWD249.60
Each (In a Tube of 98)
units
10V SOIC Fixed ±0.1 % Surface Mount Series 10mA 36 V 9.99 V 10.01 V 8 100 μV/V 100 μV/mA 5 x 4 x 1.5mm
RS Stock No. 461-9412
Mfr. Part No.REF02BU
TWD228.00
Each
units
5V SOIC Fixed ±0.2 % Surface Mount Series - 40 V 4.99 V 5.01 V 8 0.01 %/V 0.008 %/mA 4.9 x 3.91 x 1.58mm
RS Stock No. 162-4379
Mfr. Part No.TLE2426ILP
TWD40.60
Each (In a Bag of 1000)
units
- TO-92 Adjustable - Through Hole Series 20mA 40 V 1.98 V 20.2 V 3 - - 4.83 x 3.43 x 3.68mm
RS Stock No. 412-642
Mfr. Part No.AD587JRZ
TWD270.00
Each
units
10V SOIC Fixed ±0.1 % Surface Mount Series 10mA 36 V 9.99 V 10.01 V 8 100 μV/V 100 μV/mA 5 x 4 x 1.5mm
RS Stock No. 526-773
Mfr. Part No.TLE2426ILP
TWD88.40
Each (In a Pack of 5)
units
- TO-92 Adjustable - Through Hole Series 20mA 40 V 1.98 V 20.2 V 3 - - 4.83 x 3.43 x 3.68mm
RS Stock No. 284-220
Mfr. Part No.TLE2426CLP
TWD93.00
Each
units
- TO-92 Adjustable - Through Hole Series 20mA 40 V 1.98 V 20.2 V 3 - - 4.83 x 3.43 x 3.68mm
RS Stock No. 154-7681
Mfr. Part No.LT1021DCS8-10#PBF
TWD184.20
Each (In a Tube of 50)
units
10V SOIC Fixed ±1.0 % Surface Mount Series 10mA 40 V 9.95 V 10.05 V 8 6 ppm/V 40 ppm/mA 5.004 x 3.988 x 1.498mm