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. 797-4829
Mfr. Part No.TL431AQDBZR,215
BrandNexperia
PHP13.671
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. 427-363
Mfr. Part No.AD589JRZ
PHP275.10
Each
units
1.2V SOIC Fixed ±1.2 % Surface Mount Shunt 5mA - 1.2 V 1.25 V 8 - 5 mV 5 x 4 x 1.5mm
RS Stock No. 100-0661
Mfr. Part No.ISL21080DIH309Z-TK
BrandIntersil
PHP106.526
Each (On a Tape of 5)
units
0.9V SOT-23 Fixed ±0.2 % Surface Mount Series ±7mA 5.5 V - 0.9 V 3 350 μV/V 350 μV/mA 2.92 x 1.3 x 0.95mm
RS Stock No. 809-6349
Mfr. Part No.LM4040A20IDBZT
PHP148.18
Each (In a Pack of 2)
units
2.048V SOT-23 Fixed ±0.1 % Surface Mount Shunt - - - 2.048 V 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 497-2369
Mfr. Part No.ADR421ARZ
PHP328.65
Each
units
2.5V SOIC Fixed ±0.13 % Surface Mount Series 10mA 18 V 2.497 V 2.503 V 8 35 ppm/V 70 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 121-8777
Mfr. Part No.LM4050AEM3-2.5/NOPB
PHP89.895
Each (On a Reel of 1000)
units
2.5V SOT-23 Fixed ±0.1 % Surface Mount Shunt 15mA - - - 3 - 6 mV 2.92 x 1.3 x 0.93mm
RS Stock No. 121-9053
Mfr. Part No.REF5050ID
PHP276.244
Each (In a Tube of 75)
units
5V SOIC Fixed ±0.05 % Surface Mount Series 10mA 18 V - - 8 1 ppm/V 30 ppm/mA 4.9 x 3.91 x 1.58mm
RS Stock No. 805-6758
Mfr. Part No.TL431ACDG
PHP19.819
Each (In a Pack of 50)
units
2.5 - 36V SOIC Programmable ±1.0 % Surface Mount Shunt 100mA - - 36 V 8 53 mV 25 mV 5 x 4 x 1.5mm
RS Stock No. 161-0592
Mfr. Part No.ADR425ARMZ
PHP270.995
Each (In a Tube of 50)
units
5V MSOP Fixed ±0.13 % Surface Mount Series 10mA 18 V 4.994 V 5.006 V 8 35 ppm/V 70 ppm/mA 3 x 3 x 0.85mm
RS Stock No. 523-6535
Mfr. Part No.REF03GPZ
PHP216.83
Each
units
2.5V PDIP Fixed ±0.6 % Through Hole Series 10mA 40 V 2.495 V 2.515 V 8 50 ppm/V 100 ppm/mA 9.27 x 7.24 x 3.43mm
RS Stock No. 163-2419
Mfr. Part No.LM385Z-2.5G
PHP11.049
Each (In a Bag of 2000)
units
2.5V TO-92 Fixed ±3 % Through Hole Shunt 20mA - 2.425 V 2.575 V 3 - 20 mV 5.2 x 4.19 x 5.33mm
RS Stock No. 534-3071
Mfr. Part No.LM4050AEM3-2.5/NOPB
PHP132.78
Each
units
2.5V SOT-23 Fixed ±0.1 % Surface Mount Shunt 15mA - - - 3 - 6 mV 2.92 x 1.3 x 0.93mm
RS Stock No. 522-9975
Mfr. Part No.REF195GPZ
PHP237.51
Each
units
5V PDIP Fixed ±0.04 % Through Hole Series 30mA 18 V 4.99 V 5.01 V 8 8 ppm/V 8 ppm/mA 9.27 x 7.24 x 3.43mm
RS Stock No. 761-8465
Mfr. Part No.LT1790AIS6-5#TRMPBF
PHP394.19
Each
units
5V TSOT-23 Fixed ±0.05 % Surface Mount Series - 20 V 4.998 V 5.003 V 6 220 ppm/V 250 ppm/V, 300 ppm/V 2.9 x 1.75 x 0.9mm
RS Stock No. 545-5556
Mfr. Part No.LT1021CCN8-5#PBF
PHP422.55
Each
units
5V PDIP Fixed ±0.05 % Through Hole Series 10mA 40 V 4.998 V 5.003 V 8 12 ppm/V 100 ppm/mA 10.16 x 6.48 x 3.3mm
RS Stock No. 463-498
Mfr. Part No.LM385Z-2.5G
PHP23.959
Each (In a Pack of 10)
units
2.5V TO-92 Fixed ±3 % Through Hole Shunt 20mA - 2.425 V 2.575 V 3 - 20 mV 5.2 x 4.19 x 5.33mm
RS Stock No. 162-6748
Mfr. Part No.TL432AIDBVR
PHP6.56
Each (On a Reel of 3000)
units
2.5 - 36V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA - - 36 V 5 - - 3.05 x 1.75 x 1.3mm
RS Stock No. 122-0333
Mfr. Part No.TLV431BFTA
PHP8.40
Each (On a Reel of 3000)
units
1.24 - 18V SOT-23 Adjustable ±0.5 % Surface Mount Shunt 20mA 20 V 1.24 V 18 V 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 162-8310
Mfr. Part No.REF5050AIDGKT
PHP148.292
Each (On a Reel of 250)
units
5V VSSOP Fixed ±0.05 % Surface Mount Series ±10mA 18 V - - 8 1 ppm/V 50 ppm/mA 3.1 x 3.1 x 0.95mm
RS Stock No. 165-8339
Mfr. Part No.AP4310AMTR-G1
PHP8.82
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
Related Products
Precision Fixed and Adjustable Voltage Reference ICs utilsing ...
Description:
Precision 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%.
Precision Fixed and Adjustable Voltage Reference ICs utilsing ...
Description:
Precision 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%.