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. 461-9563
Mfr. Part No.REF3040AIDBZT
HK$15.082
Each (In a Pack of 5)
units
4.096V SOT-23 Fixed ±0.2 % Surface Mount Series 25mA 7 V 4.088 V 4.104 V 3 410 μV/V 100 μV/mA 2.92 x 1.3 x 1mm
RS Stock No. 779-9167
Mfr. Part No.LT1236AIS8-10#PBF
HK$66.59
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. 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. 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. 145-6681
Mfr. Part No.REF5040AID
HK$21.626
Each (In a Tube of 75)
units
4.096V 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. 797-4829
Mfr. Part No.TL431AQDBZR,215
BrandNexperia
HK$2.685
Each (On a Tape of 50)
units
2.5 - 36V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 809-5374
Mfr. Part No.TL431AILP
HK$3.09
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. 738-5333
Mfr. Part No.TL431ASA-7
HK$2.036
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. 158-1879
Mfr. Part No.AD581SH
HK$195.324
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. 533-8467
Mfr. Part No.LM4040AIM3-4.1/NOPB
HK$15.226
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. 106-7078
Mfr. Part No.AD586JNZ
HK$57.967
Each (In a Tube of 50)
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. 162-5813
Mfr. Part No.LM285DRG4-1-2
HK$2.437
Each (On a Reel of 2500)
units
1.235V SOIC Fixed ±1.0 % Surface Mount Shunt 20mA - 1.223 V 1.247 V 8 - 12 mV 4.9 x 3.91 x 1.58mm
RS Stock No. 122-1254
Mfr. Part No.ZTL431AH6TA
HK$1.244
Each (On a Reel of 3000)
units
2.5V SC-70 Adjustable ±1.0 % Surface Mount Shunt 100mA 20 V 2.475 V 20 V 6 - - 2 x 1.35 x 1mm
RS Stock No. 527-984
Mfr. Part No.TL431AILPE3
HK$1.464
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. 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. 165-8415
Mfr. Part No.ZXRE330ASA-7
HK$3.248
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. 697-7754
Mfr. Part No.ADR435BRZ
HK$73.57
Each
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
RS Stock No. 145-6840
Mfr. Part No.LT1634BCS8-1.25#PBF
HK$30.667
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. 165-8339
Mfr. Part No.AP4310AMTR-G1
HK$1.301
Each (On a Reel of 4000)
units
2.5V SOIC Fixed ±0.4 % Surface Mount Shunt 80mA 36 V - - 8 - - 5.1 x 4 x 1.45mm
RS Stock No. 732-1345
Mfr. Part No.LM385BLPR-1-2
HK$4.556
Each (In a Pack of 5)
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
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