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. 178-8930
Mfr. Part No.TL431AILP
SGD0.326
Each (On a Reel of 1000)
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. 738-5115
Mfr. Part No.ZRC400F01TA
SGD1.506
Each (In a Pack of 5)
units
4.096V SOT-23 Fixed ±1.0 % Surface Mount Shunt 5mA - 4.06 V 4.14 V 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 535-9559
Mfr. Part No.LM4040BIM3-2.5/NOPB
SGD1.704
Each (In a Pack of 5)
units
2.5V SOT-23 Fixed ±0.2 % Surface Mount Shunt 15mA - - - 3 - 6 mV 2.92 x 1.3 x 0.93mm
RS Stock No. 163-0322
Mfr. Part No.TL431ACLPG
SGD0.296
Each (In a Bag of 2000)
units
2.5 - 36V TO-92 Programmable ±1.0 % Through Hole Shunt 100mA - - 36 V 3 53 mV 25 mV 5.2 x 4.19 x 5.33mm
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. 145-5709
Mfr. Part No.LT1021CCN8-5#PBF
SGD8.322
Each (In a Tube of 50)
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. 802-3890
Mfr. Part No.ADR4533ARZ
SGD6.60
Each
units
3.3V SOIC Fixed ±0.04 % Surface Mount Series 10mA 15 V - 3.3 V 8 10 ppm/V 120 ppm/mA 5 x 4 x 1.5mm
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
RS Stock No. 534-2860
Mfr. Part No.LM385Z-1.2/NOPB
SGD0.60
Each
units
1.235V TO-92 Fixed ±2.0 % Through Hole Shunt 20mA - - - 3 - 20 mV 5.2 x 4.19 x 5.2mm
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. 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. 159-7585
Mfr. Part No.ADR421BRZ-REEL7
SGD12.129
Each (On a Reel of 1000)
units
2.5V SOIC Fixed ±0.04 % Surface Mount Series 10mA 15 V 2.499 V 2.501 V 8 35 ppm/V 70 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 404-285
Mfr. Part No.REF5050AID
SGD4.74
Each
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. 759-2953
Mfr. Part No.ADR435BRMZ
SGD13.28
Each
units
4.096V MSOP Fixed ±0.04 % Surface Mount Series 30mA 18 V 4.998 V 5.002 V 8 20 ppm/V 15 ppm/mA 3.2 x 3.2 x 0.95mm
RS Stock No. 463-246
Mfr. Part No.TL431CLPG
SGD0.284
Each (In a Pack of 50)
units
2.5 - 36V TO-92 Adjustable ±2.2 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 5.2 x 4.19 x 5.33mm
RS Stock No. 404-291
Mfr. Part No.REF5020AID
SGD4.74
Each
units
2.048V 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. 912-9882
Mfr. Part No.ADR435BRMZ
SGD10.355
Each (In a Tube of 50)
units
4.096V MSOP Fixed ±0.04 % Surface Mount Series 30mA 18 V 4.998 V 5.002 V 8 20 ppm/V 15 ppm/mA 3.2 x 3.2 x 0.95mm
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. 808-3965
Mfr. Part No.LM385D-1.2R2G
SGD0.491
Each (On a Tape of 25)
units
1.235V SOIC Fixed ±2% Surface Mount Shunt - - 1.247 V 1.223 V 8 - - 5 x 4 x 1.5mm
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%.