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. 121-8712
Mfr. Part No.LM4040AIM3-4.1/NOPB
$1.38
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. 121-8963
Mfr. Part No.REF02AP
$6.45
Each (In a Tube of 50)
units
5V PDIP Fixed ±0.2 % Through Hole Series - 40 V 4.985 V 5.015 V 8 0.01 %/V 0.01 %/mA 9.81 x 6.35 x 4.57mm
RS Stock No. 533-8467
Mfr. Part No.LM4040AIM3-4.1/NOPB
$3.03
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. 284-220
Mfr. Part No.TLE2426CLP
$4.50
Each
units
- TO-92 Adjustable - Through Hole Series 20mA 40 V 1.98 V 20.2 V 3 - - 4.83 x 3.43 x 3.68mm
RS Stock No. 166-2430
Mfr. Part No.KA431AZTA
$0.089
Each (On a Tape of 2000)
units
2.5 - 36V TO-92 Programmable ±1.0 % Through Hole Shunt 100mA - 2.5 V 36 V 3 - - 4.58 x 3.86 x 4.58mm
RS Stock No. 920-8969
Mfr. Part No.TL431ACZ
$0.149
Each (In a Bag of 2500)
units
2.5 - 36V TO-92 Adjustable ±1.0 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 4.7 x 3.7 x 4.4mm
RS Stock No. 168-6901
Mfr. Part No.TL431ACZ-AP
$0.155
Each (On a Tape of 2000)
units
2.5 - 36V TO-92AP Adjustable ±1.0 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 5 x 4 x 5mm
RS Stock No. 779-9283
Mfr. Part No.LT1461CIS8-2.5#PBF
$7.35
Each (In a Pack of 2)
units
2.5V SOIC Fixed ±0.08 % Surface Mount Series 100mA 20 V - 2.5 V 8 12 ppm/V 40 ppm/mA 5.004 x 3.988 x 1.498mm
RS Stock No. 809-5374
Mfr. Part No.TL431AILP
$0.91
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. 166-3530
Mfr. Part No.KA431LZTA
$0.098
Each (On a Tape of 2000)
units
2.5 - 36V TO-92 Programmable ±0.5 % Through Hole Shunt - - - 36 V 3 - - 5.2 x 4.19 x 5.33mm
RS Stock No. 714-7816
Mfr. Part No.TL431ACZ-AP
$0.461
Each (In a Pack of 50)
units
2.5 - 36V TO-92AP Adjustable ±1.0 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 5 x 4 x 5mm
RS Stock No. 620-0789
Mfr. Part No.REF02AP
$7.94
Each (In a Pack of 5)
units
5V PDIP Fixed ±0.2 % Through Hole Series - 40 V 4.985 V 5.015 V 8 0.01 %/V 0.01 %/mA 9.81 x 6.35 x 4.57mm
RS Stock No. 155-6695
Mfr. Part No.LT1461CIS8-2.5#PBF
$4.104
Each (In a Tube of 100)
units
2.5V SOIC Fixed ±0.08 % Surface Mount Series 100mA 20 V - 2.5 V 8 12 ppm/V 40 ppm/mA 5.004 x 3.988 x 1.498mm
RS Stock No. 776-0759
Mfr. Part No.NCP431ACSNT1G
$0.453
Each (In a Pack of 10)
units
2.5 - 36V SOT-23 Programmable ±1.0 % Surface Mount Shunt 100mA - 2.475 V 36 V 3 - - 3.04 x 1.4 x 1.01mm
RS Stock No. 534-3037
Mfr. Part No.LM4040AIZ-2.5/NOPB
$4.36
Each
units
2.5V TO-92 Fixed ±0.1 % Through Hole Shunt 15mA - - - 3 - 6 mV 5.2 x 4.19 x 5.2mm
RS Stock No. 739-0300
Mfr. Part No.KA431AZTA
$0.347
Each (In a Pack of 10)
units
2.5 - 36V TO-92 Programmable ±1.0 % Through Hole Shunt 100mA - 2.5 V 36 V 3 - - 4.58 x 3.86 x 4.58mm
RS Stock No. 121-8773
Mfr. Part No.LM4040AIZ-2.5/NOPB
$2.662
Each (In a Box of 1800)
units
2.5V TO-92 Fixed ±0.1 % Through Hole Shunt 15mA - - - 3 - 6 mV 5.2 x 4.19 x 5.2mm
RS Stock No. 527-984
Mfr. Part No.TL431AILP
$0.498
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. 686-4768
Mfr. Part No.TL431ACZ
$0.434
Each (In a Pack of 50)
units
2.5 - 36V TO-92 Adjustable ±1.0 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 4.7 x 3.7 x 4.4mm
RS Stock No. 154-6181
Mfr. Part No.LT1790BIS6-5#TRMPBF
$4.289
Each (On a Reel of 500)
units
5V TSOT-23 Fixed ±0.1 % Surface Mount Series - 20 V 4.995 V 5.005 V 6 220 ppm/V 250 ppm/V, 300 ppm/V 2.9 x 1.75 x 0.9mm
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Shunt Voltage Reference, Fixed, 3V to 10V Precison ...
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Shunt Voltage Reference, Fixed, 3V to 10V Precison Fixed and Adjustable Voltage Reference ICs utilsing series, shunt or series/shunt topologies and available in both through-hole and surface mount packages. Voltage References are available with initial accuracies of ±0.02 to ±2%. ...