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. 714-1114
Mfr. Part No.TL431CDT
HK$1.314
Each (In a Pack of 20)
units
2.5 - 36V SOIC Adjustable ±2.0 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 8 - - 4.9 x 3.9 x 1.25mm
RS Stock No. 778-1526
Mfr. Part No.MAX6107EUR+T
BrandMaxim
HK$8.624
Each (In a Pack of 5)
units
4.5V SOT-23 Fixed ±0.4 % Surface Mount Series 5mA 12.6 V 4.482 V 4.518 V 3 550 μV/V 0.9 mV/mA, 8 mV/mA 3.04 x 1.4 x 1.02mm
RS Stock No. 145-3275
Mfr. Part No.TL431CLPG
HK$0.699
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. 159-8079
Mfr. Part No.AD588JQ
HK$243.698
Each (In a Tube of 25)
units
±10 V, ±5 V CERDIP Programmable ±0.06 % Through Hole Series 10mA 36 V - 10 V 16 ±200 μV/V ±50 μV/mA 21.34 x 7.87 x 3.56mm
RS Stock No. 857-979
Mfr. Part No.TL431CD
HK$11.70
Each
units
2.5 - 36V SOIC Adjustable ±2.0 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 8 - - 4.9 x 3.91 x 1.58mm
RS Stock No. 526-307
Mfr. Part No.TL431CDR
HK$2.211
Each (In a Pack of 25)
units
2.5 - 36V SOIC Adjustable ±2.0 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 8 - - 4.9 x 3.91 x 1.58mm
RS Stock No. 463-246
Mfr. Part No.TL431CLPG
HK$2.222
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. 165-9340
Mfr. Part No.MAX6107EUR+T
BrandMaxim
HK$7.852
Each (On a Reel of 2500)
units
4.5V SOT-23 Fixed ±0.4 % Surface Mount Series 5mA 12.6 V 4.482 V 4.518 V 3 550 μV/V 0.9 mV/mA, 8 mV/mA 3.04 x 1.4 x 1.02mm
RS Stock No. 758-9702
Mfr. Part No.AD588JQ
HK$239.77
Each
units
±10 V, ±5 V CERDIP Programmable ±0.06 % Through Hole Series 10mA 36 V - 10 V 16 ±200 μV/V ±50 μV/mA 21.34 x 7.87 x 3.56mm
RS Stock No. 162-5894
Mfr. Part No.TL431ACDBVR
HK$0.556
Each (On a Reel of 3000)
units
2.5 - 36V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 5 - - 2.9 x 1.6 x 1.15mm
RS Stock No. 121-8299
Mfr. Part No.REF5045AID
HK$24.985
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. 661-9499
Mfr. Part No.TL431ACDBVR
HK$2.148
Each (In a Pack of 10)
units
2.5 - 36V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 5 - - 2.9 x 1.6 x 1.15mm
RS Stock No. 535-9616
Mfr. Part No.LM4040CIM3-4.1/NOPB
HK$4.78
Each (In a Pack of 5)
units
4.1V SOT-23 Fixed ±0.5 % Surface Mount Shunt 15mA - - - 3 - 7 mV 2.92 x 1.3 x 0.93mm
RS Stock No. 179-1626
Mfr. Part No.TL431CD
HK$1.453
Each (In a Tube of 75)
units
2.5 - 36V SOIC Adjustable ±2.0 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 8 - - 4.9 x 3.91 x 1.58mm
RS Stock No. 163-0424
Mfr. Part No.CAT102TDI-GT3
HK$4.894
Each (On a Reel of 3000)
units
- TSOT-23 Adjustable ±1.0 % Surface Mount Shunt - 20 V 20 V - 5 1 mV 8 mV 2.9 x 1.6 x 0.9mm
RS Stock No. 162-5937
Mfr. Part No.TLVH431BQDBZT
HK$5.103
Each (On a Reel of 250)
units
1.24 - 18V SOT-23 Adjustable ±0.5 % Surface Mount Shunt 70mA 20 V 1.24 V 18 V 3 - - 2.92 x 1.3 x 1mm
RS Stock No. 154-7674
Mfr. Part No.LM329BZ#PBF
HK$17.949
Each (In a Bag of 100)
units
6.9V TO-92 Fixed ±5 % Through Hole Shunt 15mA - - 6.9 V 3 - - 4.572 x 4.572 x 3.556mm
RS Stock No. 121-8776
Mfr. Part No.LM4040DIZ-5.0/NOPB
HK$3.141
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. 808-3959
Mfr. Part No.CAT102TDI-GT3
HK$5.029
Each (In a Pack of 10)
units
0.6V TSOT-23 Adjustable ±1.0 % Surface Mount Shunt - 20 V 20 V - 5 1 mV 8 mV 2.9 x 1.6 x 0.9mm
RS Stock No. 460-988
Mfr. Part No.LM385M-2.5/NOPB
HK$6.552
Each (In a Pack of 10)
units
2.5V SOIC Fixed ±3 % Surface Mount Shunt 20mA - - - 8 - 20 mV 4.9 x 3.9 x 1.45mm
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