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. 761-5870
Mfr. Part No.LM385BM-1.2/NOPB
SGD1.72
Each (In a Pack of 5)
units
1.235V SOIC Fixed ±2.0 % Surface Mount Shunt 20mA - - 1.2 V 8 - - 4.9 x 3.9 x 1.45mm
RS Stock No. 145-7807
Mfr. Part No.LM385BM-1.2/NOPB
SGD0.842
Each (In a Tube of 95)
units
1.235V SOIC Fixed ±2.0 % Surface Mount Shunt 20mA - - 1.2 V 8 - - 4.9 x 3.9 x 1.45mm
RS Stock No. 145-0736
Mfr. Part No.LM399H#PBF
SGD16.81
Each (In a Tube of 20)
units
6.95V TO-46 Fixed ±5 % Through Hole Shunt 10mA - - 6.95 V 4 - - 10.389 (Dia.) x 5.943mm
RS Stock No. 779-8903
Mfr. Part No.LM399H#PBF
SGD16.81
Each
units
6.95V TO-46 Fixed ±5 % Through Hole Shunt 10mA - - 6.95 V 4 - - 10.389 (Dia.) x 5.943mm
RS Stock No. 714-7822
Mfr. Part No.TL431AIZT
SGD0.40
Each (In a Pack of 20)
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. 121-8915
Mfr. Part No.LM4040AIM3-5.0/NOPB
SGD2.35
Each (On a Reel of 1000)
units
5V SOT-23 Fixed ±0.1 % Surface Mount Shunt 15mA - - - 3 - 8 mV 2.92 x 1.3 x 0.93mm
RS Stock No. 536-1568
Mfr. Part No.LM4040AIM3-5.0/NOPB
SGD3.01
Each
units
5V SOT-23 Fixed ±0.1 % Surface Mount Shunt 15mA - - - 3 - 8 mV 2.92 x 1.3 x 0.93mm
RS Stock No. 168-6902
Mfr. Part No.TL431AIZT
SGD0.094
Each (On a Reel of 2000)
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. 160-3304
Mfr. Part No.ADR5041BKSZ-REEL7
SGD0.877
Each (On a Reel of 3000)
units
2.5V SC-70 Fixed ±0.1 % Surface Mount Shunt - - - 2.5 V 3 - - 2.2 x 1.35 x 1mm
RS Stock No. 914-0270
Mfr. Part No.ADR5041BKSZ-REEL7
SGD1.39
Each (In a Pack of 10)
units
2.5V SC-70 Fixed ±0.1 % Surface Mount Shunt - - - 2.5 V 3 - - 2.2 x 1.35 x 1mm
RS Stock No. 827-4338
Mfr. Part No.AD587KRZ
SGD13.79
Each
units
10V SOIC Fixed ±0.05 % Surface Mount Series 10mA 36 V 9.995 V 10.005 V 8 ±100 μV/V ±100 μV/mA 5 x 4 x 1.75mm
RS Stock No. 523-7948
Mfr. Part No.AD587KRZ
SGD9.231
Each (In a Tube of 98)
units
10V SOIC Fixed ±0.05 % Surface Mount Series 10mA 36 V 9.995 V 10.005 V 8 100 μV/V 100 μV/mA 5 x 4 x 1.5mm
RS Stock No. 195-240
Mfr. Part No.AD780BRZ
SGD20.71
Each
units
2.5V SOIC Programmable ±0.04 % Surface Mount Series/Shunt 10mA 36 V 2.499 V, 2.999 V 2 V, 3 V 8 10 μV/V 75 μV/mA 5 x 4 x 1.5mm
RS Stock No. 168-4858
Mfr. Part No.TL431AIDBZT
SGD0.436
Each (On a Reel of 250)
units
2.5 - 36V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 3 - - 2.92 x 1.3 x 1mm
RS Stock No. 661-9518
Mfr. Part No.TL431AIDBZR
SGD0.418
Each (In a Pack of 10)
units
2.5 - 36V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 3 - - 2.92 x 1.3 x 1mm
RS Stock No. 168-4859
Mfr. Part No.TL431ACDBZT
SGD0.421
Each (On a Reel of 250)
units
2.5 - 36V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 3 - - 2.92 x 1.3 x 1mm
RS Stock No. 163-2419
Mfr. Part No.LM385Z-2.5G
SGD0.385
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. 921-6939
Mfr. Part No.LM385M3-2.5/NOPB
SGD0.707
Each (On a Reel of 1000)
units
2.5V SOT-23 Fixed ±0.8 % Surface Mount Shunt 20mA - - 2.5 V 3 - 20 mV 2.92 x 1.4 x 0.94mm
RS Stock No. 809-5387
Mfr. Part No.TL431CDBVR
SGD0.443
Each (On a Tape of 10)
units
2.5 - 36V SOT-23 Adjustable ±2.0 % Surface Mount Shunt 100mA - - 36 V 5 - - 3.05 x 1.75 x 1.3mm
RS Stock No. 526-981
Mfr. Part No.TL431AIDBZT
SGD0.756
Each (In a Pack of 25)
units
2.5 - 36V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 3 - - 2.92 x 1.3 x 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%.