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. 184-1119
Mfr. Part No.TLV431ASNT1G
kr 1,172
Each (On a Reel of 3000)
Units
1.24V TSOP Precision, Programmable ±1 %, ±2 % Surface Mount Series/Shunt 20mA 16 V 1.24 V 16 V 5 - - 3.15 x 1.65 x 1mm
RS Stock No. 184-1482
Mfr. Part No.TLV431ASNT1G
kr 2,903
Each (In a Pack of 25)
Units
1.24V TSOP Precision, Programmable ±1 %, ±2 % Surface Mount Series/Shunt 20mA 16 V 1.24 V 16 V 5 - - 3.15 x 1.65 x 1mm
RS Stock No. 806-4689
Mfr. Part No.LM431AIZ
kr 0,384
Each (In a Pack of 50)
Units
2.5 - 36V TO-92 Adjustable ±2.0 % Through Hole Shunt 100 (Cathode)mA - 2.5 (Cathode) V 36 V 3 - - 5.2 x 4.19 x 5.33mm
RS Stock No. 463-498
Mfr. Part No.LM385Z-2.5G
kr 4,078
Each (In a Pack of 10)
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. 122-0101
Mfr. Part No.TL431BCDR2G
kr 1,122
Each (On a Reel of 2500)
Units
2.5 - 36V SOIC Adjustable ±0.4 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 8 - - 5 x 4 x 1.5mm
RS Stock No. 186-8906
Mfr. Part No.NCP431BISNT1G
kr 3,235
Each (On a Reel of 3000)
Units
2.5V SOT-23 Programmable 0.5% Surface Mount Shunt - 2.51 V - 36 V 3 - - 3.04 x 1.4 x 1.01mm
RS Stock No. 163-1234
Mfr. Part No.TLV431BSN1T1G
kr 1,172
Each (On a Reel of 3000)
Units
1.24 - 16V SOT-23 Adjustable ±0.5 % Surface Mount Shunt 20mA - 1.24 V 16 V 3 - - 3.04 x 1.04 x 1.01mm
RS Stock No. 805-1393
Mfr. Part No.LM385BD-2.5R2G
kr 4,691
Each (On a Tape of 20)
Units
2.5V SOIC Fixed ±1.5 % Surface Mount Shunt - - - - 8 - - 5 x 4 x 1.5mm
RS Stock No. 463-482
Mfr. Part No.LM385Z-1.2G
kr 4,078
Each (In a Pack of 10)
Units
1.235V TO-92 Fixed ±2.0 % Through Hole Shunt 20mA - 1.205 V 1.26 V 3 - 20 mV 5.2 x 4.19 x 5.33mm
RS Stock No. 184-1117
Mfr. Part No.TL431AIDG
kr 3,224
Each (In a Tube of 98)
Units
2.49V SOIC Adjustable - Surface Mount Series/Shunt 100mA 2.52 V - 36 V 8 - - 5 x 4 x 1.5mm
RS Stock No. 776-0759
Mfr. Part No.NCP431ACSNT1G
kr 2,473
Each (In a Pack of 10)
Units
2.5 - 36V SOT-23 Programmable ±1.0 % Surface Mount Shunt 100mA - 2.475 V 36 V 3 - - 3.04 x 1.4 x 1.01mm
RS Stock No. 805-1378
Mfr. Part No.LM385BD-1.2G
kr 5,675
Each (In a Pack of 25)
Units
1.235V SOIC Fixed ±1.0 % Surface Mount Shunt - - - - 8 - - 5 x 4 x 1.5mm
RS Stock No. 808-3965
Mfr. Part No.LM385D-1.2R2G
kr 4,594
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
RS Stock No. 171-8421
Mfr. Part No.NCV51460SN33T1G
kr 7,095
Each (In a Pack of 25)
Units
3.3V SOT-23 Fixed ±1% Surface Mount - 20mA 28 V 3.26 V 3.33 V 3 500 ppm/V 4000 ppm/mA 3.04 x 1.4 x 1.01mm
RS Stock No. 145-3127
Mfr. Part No.TL431AILPG
kr 0,85
Each (In a Bag of 2000)
Units
2.5 - 36V TO-92 Programmable ±4 % Through Hole Shunt 100mA 37 V 2.495 V 36 V 3 53 mV 25 mV 5.2 x 4.19 x 5.33mm
RS Stock No. 862-4976
Mfr. Part No.TL431ACLPG
kr 3,166
Each (In a Pack of 50)
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. 122-0102
Mfr. Part No.TL431BIDR2G
kr 1,063
Each (On a Reel of 2500)
Units
2.5 - 36V SOIC Adjustable ±0.4 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 8 - - 5 x 4 x 1.5mm
RS Stock No. 806-4052
Mfr. Part No.LM431SCCM3X
kr 1,173
Each (In a Pack of 100)
Units
2.5 - 36V SOT-23 Adjustable ±0.5 % Surface Mount Shunt 100 (Cathode)mA - 2.5 (Cathode) V 36 V 3 - - 2.92 x 1.3 x 0.93mm
RS Stock No. 806-4049
Mfr. Part No.LM431SBCMFX
kr 1,075
Each (On a Tape of 100)
Units
2.5 - 36V SOT-23F Adjustable ±1.0 % Surface Mount Shunt 100 (Cathode)mA - 2.5 (Cathode) V 36 V 3 - - 3 x 1.7 x 1mm
RS Stock No. 806-4043
Mfr. Part No.LM431SCCM32X
kr 0,444
Each (On a Tape of 100)
Units
2.5 - 36V SOT-23 Adjustable ±0.5 % Surface Mount Shunt 100 (Cathode)mA - 2.5 (Cathode) V 36 V 3 - - 2.92 x 1.3 x 0.93mm