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. 533-8467
Mfr. Part No.LM4040AIM3-4.1/NOPB
HK$17.012
Each (In a Pack of 5)
units
4.096V SOT-23 Fixed ±0.1 % Surface Mount Shunt 15mA - - - 3 - 7 mV 2.92 x 1.3 x 0.93mm
RS Stock No. 145-6562
Mfr. Part No.LT1009CDR
HK$4.718
Each (On a Reel of 2500)
units
2.5V SOIC Fixed ±0.2 % Surface Mount Shunt 10mA - 2.485 V 2.515 V 8 - 10 mV 4.9 x 3.91 x 1.58mm
RS Stock No. 412-349
Mfr. Part No.ADR02ARZ
HK$24.196
Each (In a Pack of 5)
units
5V SOIC Fixed ±0.1 % Surface Mount Series 10mA 36 V 4.995 V 5.005 V 8 30 ppm/V 70 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 158-5253
Mfr. Part No.AD586MNZ
HK$121.25
Each (In a Tube of 50)
units
5V PDIP Fixed ±0.04 % Through Hole Series 10mA 36 V 4.998 V 5.002 V 8 100 μV/V 400 μV/mA 9.27 x 7.24 x 3.43mm
RS Stock No. 158-1979
Mfr. Part No.AD1582BRTZ-REEL7
HK$11.417
Each (On a Reel of 3000)
units
2.5V SOT-23 Fixed ±0.08 % Surface Mount Series 5mA 12 V 2.498 V 2.502 V 3 25 μV/V 3.5 mV/mA 2.9 x 1.3 x 1.02mm
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. 162-6254
Mfr. Part No.LM4128BMF-2.5/NOPB
HK$12.322
Each (On a Reel of 1000)
units
2.5V SOT-23 Fixed ±0.2 % Surface Mount Series 20mA 12 V - 2.5 V 5 50 ppm/V 120 ppm/mA 2.92 x 1.6 x 1.02mm
RS Stock No. 527-984
Mfr. Part No.TL431AILP
HK$2.822
Each (In a Pack of 25)
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. 404-304
Mfr. Part No.REF5025AID
HK$29.95
Each
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. 121-8839
Mfr. Part No.LM4040BIM3-2.5/NOPB
HK$5.057
Each (On a Reel of 1000)
units
2.5V SOT-23 Fixed ±0.2 % Surface Mount Shunt 15mA - - - 3 - 6 mV 2.92 x 1.3 x 0.93mm
RS Stock No. 538-6573
Mfr. Part No.ADR03BRZ
HK$51.34
Each
units
2.5V SOIC Fixed ±0.1 % Surface Mount Series 10mA 36 V 2.498 V 2.503 V 8 30 ppm/V 70 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 121-8695
Mfr. Part No.LM336Z-5.0/NOPB
HK$2.699
Each (In a Box of 1800)
units
5V TO-92 Fixed ±1.0 % Through Hole Shunt 10mA - 4.8 V 5.2 V 3 - 20 mV 5.2 x 4.19 x 5.2mm
RS Stock No. 758-9727
Mfr. Part No.AD688AQ
HK$321.74
Each
units
10V CERDIP Fixed ±0.05 % Through Hole Series 10mA 36 V - 10 V 16 ±200 μV/V ±200 μV/mA 21.34 x 7.87 x 3.56mm
RS Stock No. 921-0543
Mfr. Part No.AP4310AMTR-G1
HK$3.56
Each (In a Pack of 50)
units
2.5V SOIC Fixed ±0.4 % Surface Mount Shunt 80mA 36 V - - 8 - - 5.1 x 4 x 1.45mm
RS Stock No. 169-7423
Mfr. Part No.ZHT431F02TA
HK$3.98
Each (On a Reel of 3000)
units
2.5V SOT-23 Adjustable ±2.0 % Surface Mount Shunt 100mA 20 V - 20 V 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 461-9535
Mfr. Part No.REF3020AIDBZT
HK$14.10
Each (In a Pack of 5)
units
2.048V SOT-23 Fixed ±0.2 % Surface Mount Series 25mA 7 V 2.044 V 2.052 V 3 290 μV/V 100 μV/mA 2.92 x 1.3 x 1mm
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. 809-5374
Mfr. Part No.TL431AILP
HK$3.34
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. 912-9911
Mfr. Part No.ADR3425ARJZ-R2
HK$24.411
Each (On a Reel of 250)
units
2.5V SOT-23 Fixed ±0.1 % Surface Mount Series 10mA 5.5 V 2.498 V 2.503 V 6 120 ppm/V 50 ppm/mA 3 x 1.7 x 1.3mm
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
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