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
SGD1.706
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
SGD1.46
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
SGD17.18
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
SGD17.18
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
SGD0.368
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
SGD1.359
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. 168-6902
Mfr. Part No.TL431AIZT
SGD0.123
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. 536-1568
Mfr. Part No.LM4040AIM3-5.0/NOPB
SGD2.60
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. 523-7948
Mfr. Part No.AD587KRZ
SGD11.687
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. 914-0270
Mfr. Part No.ADR5041BKSZ-REEL7
SGD1.294
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. 160-3304
Mfr. Part No.ADR5041BKSZ-REEL7
SGD0.682
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. 827-4338
Mfr. Part No.AD587KRZ
SGD13.62
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. 168-4859
Mfr. Part No.TL431ACDBZT
SGD0.544
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. 922-2524
Mfr. Part No.TL431ACDBZR
SGD0.146
Each (On a Reel of 3000)
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
SGD0.482
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. 661-9502
Mfr. Part No.TL431ACDBZR
SGD0.426
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. 163-2419
Mfr. Part No.LM385Z-2.5G
SGD0.322
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. 195-240
Mfr. Part No.AD780BRZ
SGD18.46
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. 162-5897
Mfr. Part No.TL431AIDBZR
SGD0.162
Each (On a Reel of 3000)
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. 527-306
Mfr. Part No.TL431ACDBZT
SGD0.844
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
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