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. Learn more in our complete guide to voltage references.

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. 428-436
Mfr. Part No.TL431ACLP
£0.36
Each
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. 145-1010
Mfr. Part No.TL431ACLP
£0.102
Each (In a Bag of 1000)
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. 169-5617
Mfr. Part No.TL431CLPR
£0.07
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. 661-9827
Mfr. Part No.TL431CLPR
£0.193
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. 534-3037
Mfr. Part No.LM4040AIZ-2.5/NOPB
£1.42
Each
Units
2.5V TO-92 Fixed ±0.1 % Through Hole Shunt 15mA - - - 3 - 6 mV 5.2 x 4.19 x 5.2mm
RS Stock No. 534-3065
Mfr. Part No.LM4040DIZ-5.0/NOPB
£0.47
Each
Units
5V TO-92 Precision 1% Through Hole Shunt 15mA - - - 3 - - 5.2 x 4.19 x 5.2mm
RS Stock No. 121-8776
Mfr. Part No.LM4040DIZ-5.0/NOPB
£0.173
Each (In a Box of 1800)
Units
5V TO-92 Fixed ±1.0 % Through Hole Shunt 15mA - - - 3 - - 5.2 x 4.19 x 5.2mm
RS Stock No. 121-8773
Mfr. Part No.LM4040AIZ-2.5/NOPB
£0.723
Each (In a Box of 1800)
Units
2.5V TO-92 Fixed ±0.1 % Through Hole Shunt 15mA - - - 3 - 6 mV 5.2 x 4.19 x 5.2mm
RS Stock No. 534-2860
Mfr. Part No.LM385Z-1.2/NOPB
£0.57
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. 162-4726
Mfr. Part No.LM385Z-1.2/NOPB
£0.223
Each (In a Box of 1800)
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. 809-5374
Mfr. Part No.TL431AILP
£0.32
Each (In a Pack of 5)
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. 527-984
Mfr. Part No.TL431AILP
£0.244
Each (In a Pack of 25)
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. 523-7011
Mfr. Part No.REF195GSZ
£2.70
Each
Units
5V SOIC Fixed ±0.04 % Surface Mount Series 30mA 18 V 4.99 V 5.01 V 8 8 ppm/V 8 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 111-1166
Mfr. Part No.REF195GSZ
£1.946
Each (In a Tube of 98)
Units
5V SOIC Fixed ±0.04 % Surface Mount Series 30mA 18 V 4.99 V 5.01 V 8 8 ppm/V 8 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 921-3012
Mfr. Part No.REF5025AIDGKT
£1.622
Each (On a Reel of 250)
Units
2.5V VSSOP Fixed ±0.1 % Surface Mount Series ±10mA 18 V - 2.5 V 8 1 ppm/V 50 ppm/mA 3.1 x 3.1 x 0.95mm
RS Stock No. 825-3338
Mfr. Part No.REF5025AIDGKT
£2.675
Each (In a Pack of 2)
Units
2.5V VSSOP Fixed ±0.1 % Surface Mount Series ±10mA 18 V - 2.5 V 8 1 ppm/V 50 ppm/mA 3.1 x 3.1 x 0.95mm
RS Stock No. 461-9529
Mfr. Part No.REF3012AIDBZT
£1.18
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. 145-6903
Mfr. Part No.REF3012AIDBZT
£0.675
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. 121-8695
Mfr. Part No.LM336Z-5.0/NOPB
£0.255
Each (In a Box of 1800)
Units
5V TO-92 Fixed ±1.0 % Through Hole Shunt 10mA - 4.8 V 5.2 V 3 - 20 mV 5.2 x 4.19 x 5.2mm
RS Stock No. 533-5806
Mfr. Part No.LM336Z-5.0/NOPB
£0.61
Each
Units
5V TO-92 Precision 1% Through Hole Shunt 10mA - 4.8 V 5.2 V 3 - 20 mV 5.2 x 4.19 x 5.2mm
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%. Shunt Voltage Reference, Adjustable, TL Series. Voltage References, Texas Instruments.