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. 661-9758
Mfr. Part No.TLE2426IP
TWD80.20
Each (In a Pack of 5)
units
- PDIP Adjustable - Through Hole Series 20mA 40 V 1.98 V 20.2 V 8 - - 9.81 x 6.35 x 4.57mm
RS Stock No. 857-979
Mfr. Part No.TL431CD
TWD13.00
Each
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. 162-4377
Mfr. Part No.TLE2425CLP
TWD40.90
Each (In a Bag of 1000)
units
2.5V TO-92 Fixed - Through Hole Series 80mA 40 V 2.47 V 2.53 V 3 - - 4.83 x 3.43 x 3.68mm
RS Stock No. 169-5617
Mfr. Part No.TL431CLPR
TWD3.20
Each (On a Reel of 2000)
units
2.5 - 36V TO-92 Adjustable ±2.0 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 4.83 x 3.43 x 3.68mm
RS Stock No. 738-5345
Mfr. Part No.TL431AW5-7
TWD9.20
Each (On a Tape of 50)
units
2.5 - 36V SOT-25 Adjustable ±1.0 % Surface Mount Shunt 100mA 40 V 2.5 V 36 V 5 - - 3.1 x 1.7 x 1.3mm
RS Stock No. 145-6903
Mfr. Part No.REF3012AIDBZT
TWD35.60
Each (On a Reel of 250)
units
1.25V SOT-23 Fixed ±0.2 % Surface Mount Series 25mA 7 V 1.248 V 1.253 V 3 190 μV/V 100 μV/mA 2.92 x 1.3 x 1mm
RS Stock No. 461-9529
Mfr. Part No.REF3012AIDBZT
TWD51.60
Each (In a Pack of 5)
units
1.25V SOT-23 Fixed ±0.2 % Surface Mount Series 25mA 7 V 1.248 V 1.253 V 3 190 μV/V 100 μV/mA 2.92 x 1.3 x 1mm
RS Stock No. 758-9572
Mfr. Part No.AD1583BRTZ-REEL7
TWD79.00
Each
units
3V SOT-23 Fixed ±0.1 % Surface Mount Series 5mA 5 V 2.997 V 3 V 3 25 μV/V 3.7 mV/mA 3.04 x 1.4 x 1.02mm
RS Stock No. 145-6171
Mfr. Part No.LT1021CCN8-10#PBF
TWD201.70
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. 168-4849
Mfr. Part No.TL431ACDR
TWD3.30
Each (On a Reel of 2500)
units
2.5 - 36V SOIC Adjustable ±1.0 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 8 - - 4.9 x 3.91 x 1.58mm
RS Stock No. 121-8468
Mfr. Part No.TL431ILP
TWD4.50
Each (In a Box of 1000)
units
2.5 - 36V TO-92 Adjustable ±2.0 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 4.83 x 3.43 x 3.68mm
RS Stock No. 751-5228
Mfr. Part No.ZTL431AFTA
TWD9.90
Each (In a Pack of 50)
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. 661-9827
Mfr. Part No.TL431CLPR
TWD9.50
Each (In a Pack of 10)
units
2.5 - 36V TO-92 Adjustable ±2.0 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 4.83 x 3.43 x 3.68mm
RS Stock No. 471-433
Mfr. Part No.LTC6652AHMS8-3.3#PBF
TWD291.00
Each
units
3.3V MSOP Fixed ±0.05 % Surface Mount Series 5mA 13.2 V - - 8 50 ppm/V 150 ppm/mA 3 x 3 x 0.86mm
RS Stock No. 121-8839
Mfr. Part No.LM4040BIM3-2.5/NOPB
TWD19.80
Each (On a Reel of 1000)
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. 162-5920
Mfr. Part No.TLE2426IP
TWD68.40
Each (In a Tube of 50)
units
- PDIP Adjustable - Through Hole Series 20mA 40 V 1.98 V 20.2 V 8 - - 9.81 x 6.35 x 4.57mm
RS Stock No. 806-4683
Mfr. Part No.LM431BCMX
TWD12.90
Each (In a Pack of 20)
units
2.5 - 36V SOIC Adjustable ±1.0 % Surface Mount Shunt 100 (Cathode)mA - 2.5 (Cathode) V 36 V 8 - - 5 x 4 x 1.5mm
RS Stock No. 528-426
Mfr. Part No.TL431IPK
TWD9.40
Each (In a Pack of 25)
units
2.5 - 36V SOT-89 Adjustable ±2.0 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 3 - - 4.5 x 2.5 x 1.5mm
RS Stock No. 159-8056
Mfr. Part No.AD1583BRTZ-REEL7
TWD35.30
Each (On a Reel of 3000)
units
3V SOT-23 Fixed ±0.1 % Surface Mount Series 5mA 5 V 2.997 V 3 V 3 25 μV/V 3.7 mV/mA 3.04 x 1.4 x 1.02mm
RS Stock No. 166-3439
Mfr. Part No.LM431BCMX
TWD5.20
Each (On a Reel of 3000)
units
2.5 - 36V SOIC Adjustable ±1.0 % Surface Mount Shunt 100 (Cathode)mA - 2.5 (Cathode) V 36 V 8 - - 5 x 4 x 1.5mm