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. 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. 163-0440
Mfr. Part No.LM385D-1.2R2G
SGD0.351
Each (On a Reel of 2500)
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. 535-9329
Mfr. Part No.LM336BM-5.0/NOPB
SGD1.36
Each (In a Pack of 5)
units
5V SOIC Fixed ±1.0 % Surface Mount Shunt 10mA - 4.9 V 5.1 V 8 - 20 mV 4.9 x 3.9 x 1.45mm
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. 797-4826
Mfr. Part No.TL431BIDBZR,215
BrandNexperia
SGD0.32
Each (In a Pack of 25)
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. 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. 162-4735
Mfr. Part No.LM4051AIM3-1.2/NOPB
SGD2.189
Each (On a Reel of 1000)
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. 921-0363
Mfr. Part No.AN431AN-ATRG1
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. 145-6903
Mfr. Part No.REF3012AIDBZT
SGD1.412
Each (On a Reel of 250)
units
1.25V SOT-23 Fixed ±0.2 % Surface Mount Series 25mA 7 V 1.248 V 1.253 V 3 190 μV/V 100 μV/mA 2.92 x 1.3 x 1mm
RS Stock No. 809-9272
Mfr. Part No.REF02HPZ
SGD7.095
Each (In a Pack of 2)
units
5V PDIP Fixed ±0.5 % Through Hole Series - 40 V 4.975 V 5.025 V 8 0.01 %/V 0.01 %/mA 10.16 x 7.11 x 4.95mm
RS Stock No. 162-5928
Mfr. Part No.TLV431AIDBVR
SGD0.362
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. 184-1119
Mfr. Part No.TLV431ASNT1G
SGD0.202
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. 162-5926
Mfr. Part No.TLV431ACDBZR
SGD0.417
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. 802-3890
Mfr. Part No.ADR4533ARZ
SGD6.60
Each
units
3.3V SOIC Fixed ±0.04 % Surface Mount Series 10mA 15 V - 3.3 V 8 10 ppm/V 120 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 921-0543
Mfr. Part No.AP4310AMTR-G1
SGD0.279
Each (In a Pack of 50)
units
2.5V SOIC Fixed ±0.4 % Surface Mount Shunt 80mA 36 V - - 8 - - 5.1 x 4 x 1.45mm
RS Stock No. 661-9534
Mfr. Part No.TL431BIDBZT
SGD0.996
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. 165-8507
Mfr. Part No.AN431AN-ATRG1
SGD0.083
Each (On a Reel of 3000)
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. 809-5374
Mfr. Part No.TL431AILP
SGD0.192
Each (In a Pack of 5)
units
2.5 - 36V TO-92 Adjustable ±1.0 % Through Hole Shunt 100mA - - 36 V 3 - - 5.21 x 4.19 x 5.34mm
RS Stock No. 739-0448
Mfr. Part No.LM336Z25
SGD0.314
Each (In a Pack of 5)
units
2.5V TO-92 Fixed ±1.0 % Through Hole Shunt - - 2.44 V 2.54 V 3 - 10 mV 4.58 x 3.86 x 4.58mm
RS Stock No. 912-7220
Mfr. Part No.AD587JRZ
SGD7.783
Each (In a Tube of 98)
units
10V SOIC Fixed ±0.1 % Surface Mount Series 10mA 36 V 9.99 V 10.01 V 8 100 μV/V 100 μV/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%.
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%.