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. 411-573
Mfr. Part No.AD580JH
MYR48.83
Each
units
2.5V TO-52 Fixed ±0.4 % Through Hole Series - 40 V - - 3 6 mV 10 mV 5.84 x 5.84 x 3.81mm
RS Stock No. 523-6125
Mfr. Part No.REF193GSZ
MYR13.70
Each
units
3V SOIC Fixed ±0.07 % Surface Mount Series 30mA 18 V 2.99 V 3 V 8 8 ppm/V 15 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 536-1568
Mfr. Part No.LM4040AIM3-5.0/NOPB
MYR7.66
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. 857-979
Mfr. Part No.TL431CD
MYR1.57
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. 195-240
Mfr. Part No.AD780BRZ
MYR57.34
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. 523-8115
Mfr. Part No.REF192GSZ
MYR10.47
Each (In a Tube of 98)
units
2.5V SOIC Fixed ±0.08 % Surface Mount Series 30mA 18 V 2.49 V 2.51 V 8 8 ppm/V 15 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 758-9572
Mfr. Part No.AD1583BRTZ-REEL7
MYR9.24
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. 159-7585
Mfr. Part No.ADR421BRZ-REEL7
MYR36.752
Each (On a Reel of 1000)
units
2.5V SOIC Fixed ±0.04 % Surface Mount Series 10mA 15 V 2.499 V 2.501 V 8 35 ppm/V 70 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 759-0459
Mfr. Part No.ADR421BRZ-REEL7
MYR42.17
Each
units
2.5V SOIC Fixed ±0.04 % Surface Mount Series 10mA 15 V 2.499 V 2.501 V 8 35 ppm/V 70 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 159-8056
Mfr. Part No.AD1583BRTZ-REEL7
MYR6.477
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. 162-5920
Mfr. Part No.TLE2426IP
MYR8.02
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. 671-0292
Mfr. Part No.LM336Z5
MYR1.612
Each (In a Pack of 5)
units
5V TO-92 Programmable ±1.0 % Through Hole Shunt 400mA - 4.8 V 5.2 V 3 - 20 mV 4.58 x 3.86 x 4.58mm
RS Stock No. 162-4378
Mfr. Part No.TLE2426CLP
MYR10.901
Each (In a Bag of 1000)
units
- TO-92 Adjustable - Through Hole Series 20mA 40 V 1.98 V 20.2 V 3 - - 4.83 x 3.43 x 3.68mm
RS Stock No. 284-220
Mfr. Part No.TLE2426CLP
MYR10.88
Each
units
- TO-92 Adjustable - Through Hole Series 20mA 40 V 1.98 V 20.2 V 3 - - 4.83 x 3.43 x 3.68mm
RS Stock No. 661-9758
Mfr. Part No.TLE2426IP
MYR9.41
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. 802-3903
Mfr. Part No.ADR4540ARZ
MYR25.28
Each
units
4.096V SOIC Fixed ±0.04 % Surface Mount Series 10mA 15 V - - 8 10 ppm/V 120 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 179-1626
Mfr. Part No.TL431CD
MYR1.15
Each (In a Tube of 75)
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. 166-3616
Mfr. Part No.LM431CCZ
MYR0.241
Each (In a Bag of 10000)
units
2.5 - 36V TO-92 Adjustable ±0.5 % Through Hole Shunt 100 (Cathode)mA - 2.5 (Cathode) V 36 V 3 - - 5.2 x 4.19 x 5.33mm
RS Stock No. 660-5623
Mfr. Part No.REF102AP
MYR23.44
Each
units
10V PDIP Fixed ±0.1 % Through Hole Series - 40 V 9.99 V 10.01 V 8 2 ppm/V 40 ppm/mA 9.81 x 6.35 x 4.57mm
RS Stock No. 806-4695
Mfr. Part No.LM431CCZ
MYR1.09
Each (In a Pack of 50)
units
2.5 - 36V TO-92 Adjustable ±0.5 % Through Hole Shunt 100 (Cathode)mA - 2.5 (Cathode) V 36 V 3 - - 5.2 x 4.19 x 5.33mm
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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%.