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. 533-8445
Mfr. Part No.LM4040AIM3-2.5/NOPB
$3.19
Each (In a Pack of 5)
units
2.5V SOT-23 Fixed ±0.1 % Surface Mount Shunt 15mA - - - 3 - 6 mV 2.92 x 1.3 x 0.93mm
RS Stock No. 535-9559
Mfr. Part No.LM4040BIM3-2.5/NOPB
$2.176
Each (In a Pack of 5)
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. 535-9644
Mfr. Part No.LM4040DIM3-4.1/NOPB
$1.132
Each (In a Pack of 5)
units
4.1V SOT-23 Fixed ±1.0 % Surface Mount Shunt 15mA - - - 3 - 9 mV 2.92 x 1.3 x 0.93mm
RS Stock No. 796-8120
Mfr. Part No.LT1004ID-2-5
$1.914
Each (In a Pack of 5)
units
2.5V SOIC Fixed ±0.8 % Surface Mount Shunt - - - - 8 - 20 mV 5 x 4 x 1.5mm
RS Stock No. 661-9580
Mfr. Part No.TLE2426IDR
$3.598
Each (In a Pack of 5)
units
- SOIC Adjustable - Surface Mount Series 20mA 40 V 1.98 V 20.2 V 8 - - 4.9 x 3.91 x 1.58mm
RS Stock No. 661-9754
Mfr. Part No.TLE2426CP
$3.95
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. 922-2524
Mfr. Part No.TL431ACDBZR
$0.163
Each (On a Reel of 3000)
units
2.5 - 36V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 3 - - 2.92 x 1.3 x 1mm
RS Stock No. 620-0161
Mfr. Part No.TLE2426CD
$4.136
Each (In a Pack of 5)
units
- SOIC Adjustable - Surface Mount Series 20mA 40 V 1.98 V 20.2 V 8 - - 4.9 x 3.91 x 1.58mm
RS Stock No. 526-307
Mfr. Part No.TL431CDR
$0.505
Each (In a Pack of 25)
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. 121-8844
Mfr. Part No.LM4040DIM3-10.0/NOPB
$0.416
Each (On a Reel of 1000)
units
10V SOT-23 Fixed ±1.0 % Surface Mount Shunt 15mA - - - 3 - 18 mV 2.92 x 1.3 x 0.93mm
RS Stock No. 106-7055
Mfr. Part No.REF02CSZ
$3.982
Each (In a Tube of 98)
units
5V SOIC Fixed ±1.0 % Surface Mount Series 8mA 40 V 4.95 V 5.05 V 8 150 ppm/V 150 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 145-6840
Mfr. Part No.LT1634BCS8-1.25#PBF
$6.35
Each (In a Tube of 50)
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. 169-5617
Mfr. Part No.TL431CLPR
$0.16
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. 168-4849
Mfr. Part No.TL431ACDR
$0.163
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. 661-9758
Mfr. Part No.TLE2426IP
$3.994
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. 697-7760
Mfr. Part No.ADR445BRZ
$14.58
Each
units
5V SOIC Fixed ±0.04 % Surface Mount Series 10mA 20 V 4.998 V 5.006 V 8 20 ppm/V 50 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 661-9827
Mfr. Part No.TL431CLPR
$0.47
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. 158-0180
Mfr. Part No.ADR431ARMZ
$8.338
Each (In a Tube of 50)
units
2.5V MSOP Fixed ±0.13 % Surface Mount Series 30mA 20 V - - 8 20 ppm/V 15 ppm/mA 3 x 3 x 0.85mm
RS Stock No. 461-9412
Mfr. Part No.REF02BU
$10.97
Each
units
5V SOIC Fixed ±0.2 % Surface Mount Series - 40 V 4.99 V 5.01 V 8 0.01 %/V 0.008 %/mA 4.9 x 3.91 x 1.58mm
RS Stock No. 912-6372
Mfr. Part No.ADR445BRZ
$11.605
Each (In a Tube of 98)
units
5V SOIC Fixed ±0.04 % Surface Mount Series 10mA 20 V 4.998 V 5.006 V 8 20 ppm/V 50 ppm/mA 5 x 4 x 1.5mm
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%.
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%.