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. 121-8694
Mfr. Part No.LM336Z-2.5/NOPB
HK$2.734
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. 661-9423
Mfr. Part No.LT1009CDR
HK$8.254
Each (In a Pack of 5)
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. 158-0224
Mfr. Part No.ADR03BRZ
HK$33.662
Each (In a Tube of 98)
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. 162-5820
Mfr. Part No.LM4040B25IDBZR
HK$9.506
Each (On a Reel of 3000)
units
2.5V SOT-23 Fixed ±0.2 % Surface Mount Shunt 15mA - - - 3 - 6 mV 2.92 x 1.3 x 1mm
RS Stock No. 102-5611
Mfr. Part No.LM4120AIM5-2.5/NOPB
HK$7.80
Each (On a Reel of 1000)
units
2.5V SOT-23 Fixed ±0.2 % Surface Mount Series 5mA 14 V - - 5 0.008 %/V 0.12 %/mA 2.92 x 1.6 x 1.02mm
RS Stock No. 751-5221
Mfr. Part No.ZTL431AH6TA
HK$3.076
Each (On a Tape of 25)
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. 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. 661-9341
Mfr. Part No.LM4040C41IDBZR
HK$3.158
Each (In a Pack of 5)
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. 121-9495
Mfr. Part No.TL431ASA-7
HK$0.616
Each (On a Reel of 3000)
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. 809-5217
Mfr. Part No.LM4040B25IDBZT
HK$12.176
Each (On a Tape of 20)
units
2.5V SOT-23 Fixed ±0.2 % Surface Mount Shunt 80µA - - 2.5 V 3 - - 3.04 x 1.4 x 1.02mm
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. 163-0923
Mfr. Part No.LM385BZ-2.5G
HK$2.353
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. 155-6676
Mfr. Part No.LT1236AIS8-10#PBF
HK$49.472
Each (In a Tube of 50)
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. 912-6375
Mfr. Part No.ADR435BRZ
HK$57.039
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
RS Stock No. 461-9563
Mfr. Part No.REF3040AIDBZT
HK$11.988
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. 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. 146-1282
Mfr. Part No.MAX6126AASA41+
BrandMaxim
HK$56.37
Each (In a Tube of 100)
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. 404-326
Mfr. Part No.REF5040AID
HK$28.34
Each
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. 169-7423
Mfr. Part No.ZHT431F02TA
HK$3.514
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. 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