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. 121-9572
Mfr. Part No.ZTL431AFTA
SGD0.099
Each (On a Reel of 3000)
units
2.5V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 20 V 2.475 V 20 V 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 526-307
Mfr. Part No.TL431CDR
SGD0.173
Each (In a Pack of 25)
units
2.5 - 36V SOIC Adjustable ±2.0 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 8 - - 4.9 x 3.91 x 1.58mm
RS Stock No. 460-938
Mfr. Part No.LM336M-2.5/NOPB
SGD1.058
Each (In a Pack of 10)
units
2.5V SOIC Fixed ±4 % Surface Mount Shunt 10mA - 2.39 V 2.59 V 8 - 10 mV 4.9 x 3.9 x 1.45mm
RS Stock No. 145-6747
Mfr. Part No.TLV431AID
SGD0.46
Each (In a Tube of 75)
units
1.24 - 6V SOIC Adjustable ±1.0 % Surface Mount Shunt 15mA - 1.24 V 6 V 8 - - 4.9 x 3.91 x 1.58mm
RS Stock No. 165-9768
Mfr. Part No.TL431QDBZR,215
BrandNexperia
SGD0.128
Each (On a Reel of 3000)
units
2.5 - 36V SOT-23 Adjustable ±2.0 % Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 523-7976
Mfr. Part No.AD780ARZ
SGD11.75
Each (In a Tube of 98)
units
2.5 V, 3 V SOIC Programmable ±0.2 % Surface Mount Series/Shunt 10mA 36 V 2.495 V, 2.995 V 2 V, 3 V 8 10 μV/V 75 μV/mA 5 x 4 x 1.5mm
RS Stock No. 923-2405
Mfr. Part No.REF5050AID
SGD4.36
Each (In a Tube of 75)
units
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. 797-4848
Mfr. Part No.TL431QDBZR,215
BrandNexperia
SGD0.235
Each (On a Tape of 50)
units
2.5 - 36V SOT-23 Adjustable ±2.0 % Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 460-966
Mfr. Part No.LM431AIM/NOPB
SGD1.01
Each (In a Pack of 5)
units
2.5 - 36V SOIC Adjustable ±2.0 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 8 - - 4.9 x 3.9 x 1.45mm
RS Stock No. 661-9596
Mfr. Part No.TLV431ACDBZR
SGD0.912
Each (In a Pack of 5)
units
1.24 - 6V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 15mA - 1.24 V 6 V 3 - - 2.92 x 1.3 x 1mm
RS Stock No. 661-9534
Mfr. Part No.TL431BIDBZT
SGD0.996
Each (In a Pack of 5)
units
2.5 - 36V SOT-23 Adjustable ±0.5 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 3 - - 2.92 x 1.3 x 1mm
RS Stock No. 651-3293
Mfr. Part No.LM4132DMF-4.1/NOPB
SGD2.16
Each
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. 162-5085
Mfr. Part No.LM4132DMF-4.1/NOPB
SGD2.574
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. 230-860
Mfr. Part No.REF02HPZ
SGD10.68
Each
units
5V PDIP Fixed ±0.5 % Through Hole Series 10mA 40 V 4.975 V 5.025 V 8 100 ppm/V 100 ppm/mA 9.27 x 7.24 x 3.43mm
RS Stock No. 536-1574
Mfr. Part No.LM4051AIM3-1.2/NOPB
SGD3.95
Each
units
1.225V SOT-23 Fixed ±0.1 % Surface Mount Shunt 12mA - - - 3 - 6 mV 2.92 x 1.3 x 0.93mm
RS Stock No. 781-4168
Mfr. Part No.LM4040DTB-300GT3
SGD0.48
Each (In a Pack of 10)
units
3V SOT-23 Fixed ±1.0 % Surface Mount Shunt 15mA - - 3 V 3 - - 3.04 x 1.04 x 1.12mm
RS Stock No. 145-6171
Mfr. Part No.LT1021CCN8-10#PBF
SGD8.322
Each (In a Tube of 50)
units
10V PDIP Fixed ±0.05 % Through Hole Series/Shunt 10mA 40 V 9.995 V 10.005 V 8 4 ppm/V 100 ppm/mA 10.16 x 6.48 x 3.3mm
RS Stock No. 154-891
Mfr. Part No.ZR431FTA
SGD0.683
Each (In a Pack of 10)
units
2.5 - 20V SOT-23 Adjustable ±2.0 % Surface Mount Shunt 100mA 20 V 2.5 V 20 V 3 - - 2.9 x 1.3 x 1mm
RS Stock No. 660-7345
Mfr. Part No.REF1112AIDBZT
SGD3.95
Each (In a Pack of 5)
units
1.25V SOT-23 Fixed ±0.2 % Surface Mount Shunt 5mA - 1.248 V 1.253 V 3 - 100 ppm/mA 2.92 x 1.3 x 1mm
RS Stock No. 921-0363
Mfr. Part No.AN431AN-ATRG1
SGD0.122
Each (In a Pack of 100)
units
2.5V SOT-23 Adjustable ±0.5 % Surface Mount Shunt 100mA 36 V 2.5 V 36 V 3 - - 3 x 1.4 x 1.1mm
Related Products
Precison Fixed and Adjustable Voltage Reference ICs utilsing ...
Description:
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%.
Precison Fixed and Adjustable Voltage Reference ICs utilsing ...
Description:
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%.
Precison Fixed and Adjustable Voltage Reference ICs utilsing ...
Description:
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%.