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. 168-4199
Mfr. Part No.ADR02ARZ-REEL7
HK$11.546
Each (On a Reel of 1000)
units
5V SOIC Fixed ±0.1 % Surface Mount Series 10mA 36 V 4.995 V 5.005 V 8 40 ppm/V 80 ppm/mA 5 x 4 x 1.5mm
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. 163-2419
Mfr. Part No.LM385Z-2.5G
HK$2.21
Each (In a Bag of 2000)
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. 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. 779-9167
Mfr. Part No.LT1236AIS8-10#PBF
HK$76.45
Each
units
10V SOIC Fixed ±0.05 % 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
RS Stock No. 709-5308
Mfr. Part No.ADR444BRZ
HK$74.19
Each
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. 106-6989
Mfr. Part No.ADR02ARZ
HK$18.74
Each (In a Tube of 98)
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. 162-5085
Mfr. Part No.LM4132DMF-4.1/NOPB
HK$9.61
Each (On a Reel of 1000)
units
4.096V SOT-23 Fixed ±0.4 % Surface Mount Series 20mA 6 V - - 5 100 ppm/V 25 ppm/mA 2.92 x 1.6 x 1.02mm
RS Stock No. 121-8298
Mfr. Part No.REF5025AID
HK$26.172
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. 163-0923
Mfr. Part No.LM385BZ-2.5G
HK$2.36
Each (In a Bag of 2000)
units
2.5V TO-92 Fixed ±1.5 % Through Hole Shunt 20mA - - 2.5 V 3 - - 5.2 x 4.19 x 5.33mm
RS Stock No. 162-5824
Mfr. Part No.LM4040C41IDBZR
HK$3.01
Each (On a Reel of 3000)
units
4.096V SOT-23 Fixed ±0.5 % Surface Mount Shunt 15mA - - - 3 - 7 mV 2.92 x 1.3 x 1mm
RS Stock No. 738-5333
Mfr. Part No.TL431ASA-7
HK$2.709
Each (In a Pack of 50)
units
2.5 - 36V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 40 V 2.5 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 661-9483
Mfr. Part No.TL1431CDR
HK$4.11
Each (In a Pack of 5)
units
2.5V 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. 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. 121-8712
Mfr. Part No.LM4040AIM3-4.1/NOPB
HK$8.219
Each (On a Reel of 1000)
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. 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. 774-3486
Mfr. Part No.LM385BZ-2.5G
HK$5.56
Each (In a Pack of 5)
units
2.5V TO-92 Fixed ±1.5 % Through Hole Shunt 20mA - - 2.5 V 3 - - 5.2 x 4.19 x 5.33mm
RS Stock No. 522-8859
Mfr. Part No.AD586JNZ
HK$84.71
Each
units
5V PDIP Fixed ±0.4 % Through Hole Series 10mA 36 V 4.98 V 5.02 V 8 100 μV/V 400 μV/mA 9.27 x 7.24 x 3.43mm
RS Stock No. 162-5891
Mfr. Part No.TL1431CDR
HK$1.109
Each (On a Reel of 2500)
units
2.5V 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. 761-5141
Mfr. Part No.LM4128BMF-2.5/NOPB
HK$14.906
Each (In a Pack of 5)
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
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