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. 111-1104
Mfr. Part No.REF02CPZ
MYR15.524
Each (In a Tube of 50)
units
5V PDIP Fixed ±1.0 % Through Hole Series 8mA 40 V 4.95 V 5.05 V 8 150 ppm/V 150 ppm/mA 9.27 x 7.24 x 3.43mm
RS Stock No. 920-8969
Mfr. Part No.TL431ACZ
MYR0.389
Each (In a Bag of 2500)
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. 538-7302
Mfr. Part No.ADR01AUJZ-REEL7
MYR11.04
Each
units
10V TSOT Fixed ±0.1 % Surface Mount Series 10mA 36 V 9.99 V 10.01 V 5 30 ppm/V 70 ppm/mA 2.9 x 1.6 x 0.9mm
RS Stock No. 923-3616
Mfr. Part No.REF102CP
MYR38.665
Each (In a Tube of 50)
units
10V PDIP Fixed ±0.025 % Through Hole Series - 40 V 9.998 V 10.003 V 8 1 ppm/V 20 ppm/mA 9.81 x 6.35 x 4.57mm
RS Stock No. 661-9376
Mfr. Part No.LM4040D41IDBZR
MYR2.978
Each (In a Pack of 5)
units
4.096V SOT-23 Fixed ±1.0 % Surface Mount Shunt 15mA - - - 3 - 9 mV 2.92 x 1.3 x 1mm
RS Stock No. 121-8839
Mfr. Part No.LM4040BIM3-2.5/NOPB
MYR2.611
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. 758-9727
Mfr. Part No.AD688AQ
MYR185.24
Each
units
10V CERDIP Fixed ±0.05 % Through Hole Series 10mA 36 V - 10 V 16 ±200 μV/V ±200 μV/mA 21.34 x 7.87 x 3.56mm
RS Stock No. 714-7816
Mfr. Part No.TL431ACZ-AP
MYR1.27
Each (In a Pack of 50)
units
2.5 - 36V TO-92AP Adjustable ±1.0 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 5 x 4 x 5mm
RS Stock No. 111-2240
Mfr. Part No.ADR01BRZ
MYR21.002
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 30 ppm/V 70 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 922-2486
Mfr. Part No.LM4040D41IDBZR
MYR2.267
Each (On a Reel of 3000)
units
4.096V SOT-23 Fixed ±1.0 % Surface Mount Shunt 15mA - - - 3 - 9 mV 2.92 x 1.3 x 1mm
RS Stock No. 145-5770
Mfr. Part No.TLE2426CP
MYR8.18
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. 162-6309
Mfr. Part No.LMV431AIM5/NOPB
MYR1.15
Each (On a Reel of 1000)
units
1.24 - 30V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 15mA - 1.215 V 1.265 V 5 - - 2.92 x 1.6 x 1.02mm
RS Stock No. 162-5902
Mfr. Part No.TL431BIDBZT
MYR1.91
Each (On a Reel of 250)
units
2.5 - 36V SOT-23 Adjustable ±0.5 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 3 - - 2.92 x 1.3 x 1mm
RS Stock No. 822-5907
Mfr. Part No.LT1634BCS8-1.25#PBF
MYR23.54
Each (In a Pack of 2)
units
1.25V SOIC Fixed ±0.05 % Surface Mount Shunt 1µA - 1.25 V 5 V 8 - - 5.004 x 3.98 x 1.498mm
RS Stock No. 761-6359
Mfr. Part No.LMV431AIM5/NOPB
MYR2.489
Each (In a Pack of 10)
units
1.24 - 30V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 15mA - 1.215 V 1.265 V 5 - - 2.92 x 1.6 x 1.02mm
RS Stock No. 111-2269
Mfr. Part No.REF194GSZ
MYR11.947
Each (In a Tube of 98)
units
4.5V SOIC Fixed ±0.044 % Surface Mount Series 30mA 18 V 4.49 V 4.51 V 8 8 ppm/V 8 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 162-8309
Mfr. Part No.REF5040AIDGKT
MYR13.723
Each (On a Reel of 250)
units
4.096V VSSOP Fixed ±0.05 % Surface Mount Series 30mA 18 V - - 8 1 ppm/V 50 ppm/mA 3.1 x 3.1 x 0.95mm
RS Stock No. 661-9534
Mfr. Part No.TL431BIDBZT
MYR3.56
Each (In a Pack of 5)
units
2.5 - 36V SOT-23 Adjustable ±0.5 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 3 - - 2.92 x 1.3 x 1mm
RS Stock No. 162-6244
Mfr. Part No.LM385BLPR-1-2
MYR1.835
Each (On a Reel of 2000)
units
1.235V TO-92 Fixed ±1.0 % Through Hole Shunt 20mA - 1.22 V 1.25 V 3 - 20 mV 5.21 x 4.19 x 5.34mm
RS Stock No. 121-8840
Mfr. Part No.LM4040BIM3-5.0/NOPB
MYR4.627
Each (On a Reel of 1000)
units
5V SOT-23 Fixed ±0.2 % Surface Mount Shunt 15mA - - - 3 - 8 mV 2.92 x 1.3 x 0.93mm
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