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. 661-9297
Mfr. Part No.LM385DRG4-2-5
HK$4.598
Each (In a Pack of 5)
units
2.5V SOIC Fixed ±3 % Surface Mount Shunt 20mA - 2.425 V 2.575 V 8 - 20 mV 4.9 x 3.91 x 1.58mm
RS Stock No. 708-9491
Mfr. Part No.AD581SH
HK$255.17
Each
units
10V TO-5 Fixed ±0.3 % Through Hole Series 10mA 40 V - - 3 0.005 %/V 500 μV/mA 9.4 x 9.4 x 4.7mm
RS Stock No. 862-4922
Mfr. Part No.LM385BZ-1.2G
HK$4.58
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. 158-1879
Mfr. Part No.AD581SH
HK$206.48
Each (In a Box of 100)
units
10V TO-5 Fixed ±0.3 % Through Hole Series 10mA 40 V - - 3 0.005 %/V 500 μV/mA 9.4 x 9.4 x 4.7mm
RS Stock No. 145-0362
Mfr. Part No.TL1431CD
HK$3.08
Each (In a Tube of 75)
units
2.5 - 36V SOIC Adjustable ±0.4 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 8 - - 4.9 x 3.91 x 1.58mm
RS Stock No. 533-5799
Mfr. Part No.LM336Z-2.5/NOPB
HK$6.76
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. 912-6665
Mfr. Part No.ADR444BRZ
HK$59.04
Each (In a Tube of 98)
units
4.096V SOIC Fixed ±0.04 % Surface Mount Series 10mA 20 V 4.094 V 4.098 V 8 20 ppm/V 50 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 154-7683
Mfr. Part No.LT1034BCZ-2.5#PBF
HK$35.238
Each (In a Bag of 100)
units
2.5V TO-92 Fixed ±1.6 % Through Hole Shunt 20mA - - 2.5 V 3 - - 4.572 x 4.572 x 3.556mm
RS Stock No. 783-3905
Mfr. Part No.MAX6126AASA41+
HK$65.12
Each
units
4.096V SOIC Fixed ±0.02 % Surface Mount Series 725µA 12.6 V - 4.096 V 8 60 μV/V 40 μV/mA 5 x 4 x 1.5mm
RS Stock No. 922-2230
Mfr. Part No.LMV431BIMF/NOPB
HK$3.981
Each (On a Reel of 1000)
units
1.24 - 30V SOT-23 Adjustable ±0.5 % Surface Mount Shunt 15mA - 1.224 V 1.259 V 3 - - 2.92 x 1.3 x 0.93mm
RS Stock No. 534-2860
Mfr. Part No.LM385Z-1.2/NOPB
HK$6.16
Each
units
1.235V TO-92 Fixed ±2.0 % Through Hole Shunt 20mA - - - 3 - 20 mV 5.2 x 4.19 x 5.2mm
RS Stock No. 145-6840
Mfr. Part No.LT1634BCS8-1.25#PBF
HK$32.145
Each (In a Tube of 50)
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. 165-8415
Mfr. Part No.ZXRE330ASA-7
HK$2.88
Each (On a Reel of 3000)
units
3.3V SOT-23 Fixed ±0.5 % Surface Mount Shunt 5mA - - - 3 - - 3 x 1.4 x 1mm
RS Stock No. 761-6356
Mfr. Part No.LMV431BIMF/NOPB
HK$9.424
Each (In a Pack of 5)
units
1.24 - 30V SOT-23 Adjustable ±0.5 % Surface Mount Shunt 15mA - 1.224 V 1.259 V 3 - - 2.92 x 1.3 x 0.93mm
RS Stock No. 463-498
Mfr. Part No.LM385Z-2.5G
HK$4.28
Each (In a Pack of 10)
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
RS Stock No. 121-8694
Mfr. Part No.LM336Z-2.5/NOPB
HK$2.89
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. 178-8930
Mfr. Part No.TL431AILP
HK$1.743
Each (On a Reel of 1000)
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. 162-6244
Mfr. Part No.LM385BLPR-1-2
HK$2.554
Each (On a Reel of 2000)
units
1.235V TO-92 Fixed ±1.0 % Through Hole Shunt 20mA - 1.22 V 1.25 V 3 - 20 mV 5.21 x 4.19 x 5.34mm
RS Stock No. 121-8298
Mfr. Part No.REF5025AID
HK$26.87
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. 912-6375
Mfr. Part No.ADR435BRZ
HK$63.15
Each (In a Tube of 98)
units
5V SOIC Fixed ±0.04 % Surface Mount Series 30mA 20 V 4.998 V 5.002 V 8 20 ppm/V 15 ppm/mA 5 x 4 x 1.5mm
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