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. 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
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. 412-349
Mfr. Part No.ADR02ARZ
HK$19.768
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. 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. 162-6244
Mfr. Part No.LM385BLPR-1-2
HK$3.165
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. 639-4496
Mfr. Part No.LM4120AIM5-2.5/NOPB
HK$15.222
Each (In a Pack of 5)
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. 121-8298
Mfr. Part No.REF5025AID
HK$24.05
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. 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. 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. 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. 661-9290
Mfr. Part No.LM285DRG4-1-2
HK$4.564
Each (In a Pack of 5)
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. 145-0362
Mfr. Part No.TL1431CD
HK$1.809
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. 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. 912-9911
Mfr. Part No.ADR3425ARJZ-R2
HK$21.277
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. 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. 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. 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. 661-9483
Mfr. Part No.TL1431CDR
HK$3.262
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. 540-4154
Mfr. Part No.MAX6225ACSA+
HK$64.29
Each
units
2.5V SOIC Fixed ±0.02 % Surface Mount Series 15mA 40 V 2.499 V 2.501 V 8 18 ppm/V 1 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 145-1262
Mfr. Part No.LM385LPE3-1-2
HK$2.487
Each (In a Bag of 1000)
units
1.235V TO-92 Fixed ±2.0 % Through Hole Shunt 20mA - 1.21 V 1.26 V 3 - 20 mV 4.83 x 3.43 x 3.68mm
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