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. 527-984
Mfr. Part No.TL431AILPE3
SGD0.18
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. 162-5928
Mfr. Part No.TLV431AIDBVR
SGD0.545
Each (On a Reel of 3000)
units
1.24 - 6V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 15mA - 1.24 V 6 V 5 - - 2.9 x 1.6 x 1.15mm
RS Stock No. 536-1574
Mfr. Part No.LM4051AIM3-1.2/NOPB
SGD3.95
Each
units
1.225V SOT-23 Fixed ±0.1 % Surface Mount Shunt 12mA - - - 3 - 6 mV 2.92 x 1.3 x 0.93mm
RS Stock No. 122-1256
Mfr. Part No.ZTL432AFTA
SGD0.133
Each (On a Reel of 3000)
units
2.5V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 20 V 2.5 V 20 V 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 661-9300
Mfr. Part No.LM4040A41IDBZT
SGD3.966
Each (In a Pack of 5)
units
4.096V SOT-23 Fixed ±0.1 % Surface Mount Shunt 15mA - - - 3 - 7 mV 2.92 x 1.3 x 1mm
RS Stock No. 165-9768
Mfr. Part No.TL431QDBZR,215
BrandNexperia
SGD0.128
Each (On a Reel of 3000)
units
2.5 - 36V SOT-23 Adjustable ±2.0 % Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 460-938
Mfr. Part No.LM336M-2.5/NOPB
SGD1.058
Each (In a Pack of 10)
units
2.5V SOIC Fixed ±4 % Surface Mount Shunt 10mA - 2.39 V 2.59 V 8 - 10 mV 4.9 x 3.9 x 1.45mm
RS Stock No. 526-307
Mfr. Part No.TL431CDR
SGD0.173
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. 921-0653
Mfr. Part No.AS431ANTR-G1
SGD0.122
Each (In a Pack of 100)
units
2.5V SOT-23 Adjustable ±0.5 % Surface Mount Shunt 100mA 36 V 2.5 V 36 V 3 - - 3 x 1.4 x 1.1mm
RS Stock No. 411-589
Mfr. Part No.AD581JH
SGD32.41
Each
units
10V TO-5 Fixed ±0.3 % Through Hole Series 10mA 40 V - - 3 0.005 %/V 500 μV/mA 9.4 x 9.4 x 4.7mm
RS Stock No. 121-8297
Mfr. Part No.REF5020AID
SGD4.513
Each (In a Tube of 75)
units
2.048V SOIC Fixed ±0.05 % Surface Mount Series 10mA 18 V - - 8 1 ppm/V 50 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 823-1801
Mfr. Part No.ZR40402F25TA
SGD0.58
Each (In a Pack of 50)
units
2.5V SOT-23 Fixed ±2.0 % Surface Mount Series - - - - 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 162-6573
Mfr. Part No.LM4040D30IDCKR
SGD0.606
Each (On a Reel of 3000)
units
3V SC-70 Fixed ±1.0 % Surface Mount Shunt 80µA - - 3 V 5 - - 2.15 x 1.4 x 1mm
RS Stock No. 111-5568
Mfr. Part No.MCP1501-10E/SN
BrandMicrochip
SGD1.00
Each (In a Pack of 10)
units
1.02V SOIC Fixed ±0.08 % Surface Mount Series 30mA 5.5 V 1.023 V 1.025 V 8 50 ppm/V 40 (Sink) ppm/mA, 70 (Source) ppm/mA 4.9 x 3.9 x 1.5mm
RS Stock No. 165-9764
Mfr. Part No.TL431BIDBZR,215
BrandNexperia
SGD0.225
Each (On a Reel of 3000)
units
2.5 - 36V SOT-23 Adjustable ±0.5 % Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 922-7601
Mfr. Part No.ZR431FTA
SGD0.343
Each (On a Reel of 3000)
units
2.5 - 20V SOT-23 Adjustable ±2.0 % Surface Mount Shunt 100mA 20 V 2.5 V 20 V 3 - - 2.9 x 1.3 x 1mm
RS Stock No. 145-3275
Mfr. Part No.TL431CLPG
SGD0.131
Each (In a Bag of 2000)
units
2.5 - 36V TO-92 Adjustable ±2.2 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 5.2 x 4.19 x 5.33mm
RS Stock No. 661-9767
Mfr. Part No.TLV431AID
SGD0.878
Each (In a Pack of 5)
units
1.24 - 6V SOIC Adjustable ±1.0 % Surface Mount Shunt 15mA - 1.24 V 6 V 8 - - 4.9 x 3.91 x 1.58mm
RS Stock No. 162-5926
Mfr. Part No.TLV431ACDBZR
SGD0.49
Each (On a Reel of 3000)
units
1.24 - 6V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 15mA - 1.24 V 6 V 3 - - 2.92 x 1.3 x 1mm
RS Stock No. 738-6358
Mfr. Part No.MCP1525-I/TO
BrandMicrochip
SGD1.07
Each (In a Pack of 5)
units
2.5V TO-92 Fixed ±1.0 % Through Hole Series 20mA 7 V - - 3 350 μV/V 1.3 mV/mA 4.71 x 3.62 x 4.62mm
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%.
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%.