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. 412-642
Mfr. Part No.AD587JRZ
SGD11.05
Each
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
RS Stock No. 178-8842
Mfr. Part No.LM336M-5.0/NOPB
SGD1.465
Each (In a Tube of 95)
units
2.5V SOIC Fixed ±1.0 % Surface Mount Shunt 10mA - 4.8 V 5.2 V 8 - 20 mV 4.9 x 3.9 x 1.45mm
RS Stock No. 165-3596
Mfr. Part No.MCP1525-I/TO
BrandMicrochip
SGD0.589
Each (In a Bag of 1000)
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
RS Stock No. 535-9521
Mfr. Part No.LM4040AIM3-3.0/NOPB
SGD1.98
Each (In a Pack of 5)
units
3V SOT-23 Fixed ±0.1 % Surface Mount Shunt 15mA 37 V - - 3 - 6 mV 2.92 x 1.3 x 0.93mm
RS Stock No. 106-7054
Mfr. Part No.REF01CSZ
SGD2.921
Each (In a Tube of 98)
units
10V SOIC Fixed ±1.0 % Surface Mount Series 8mA 36 V 9.9 V 10.1 V 8 150 ppm/V 150 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 862-4976
Mfr. Part No.TL431ACLPG
SGD0.341
Each (In a Pack of 50)
units
2.5 - 36V TO-92 Programmable ±1.0 % Through Hole Shunt 100mA - - 36 V 3 53 mV 25 mV 5.2 x 4.19 x 5.33mm
RS Stock No. 857-979
Mfr. Part No.TL431CD
SGD0.47
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. 806-7824
Mfr. Part No.AD780BNZ
SGD21.42
Each
units
2.5 V, 3 V PDIP Programmable ±0.04 % Through Hole Series/Shunt 10mA 36 V 2.5 V 3 V 8 10 μV/V 75 (Shunt) μV/mA, 150 (Series) μV/mA 10.16 x 7.11 x 4.95mm
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. 163-0440
Mfr. Part No.LM385D-1.2R2G
SGD0.465
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. 111-1173
Mfr. Part No.AD587KNZ
SGD16.229
Each (In a Tube of 50)
units
10V PDIP Fixed ±0.05 % Through Hole Series 10mA 36 V 9.995 V 10.005 V 8 100 μV/V 100 μV/mA 9.27 x 7.24 x 3.43mm
RS Stock No. 811-5602
Mfr. Part No.LM4030BMF-2.5/NOPB
SGD2.524
Each (In a Pack of 10)
units
2.5V SOT-23 Fixed ±0.15 % Surface Mount Shunt 50µA - - 2.5 V 5 - - 3.05 x 1.75 x 1.3mm
RS Stock No. 166-3795
Mfr. Part No.LM336Z25X
SGD0.179
Each (On a Reel of 2000)
units
2.5V TO-92 Programmable ±1.0 % Through Hole Shunt 15 (Reverse)mA - - - 3 - - 5.2 x 4.19 x 5.33mm
RS Stock No. 806-4673
Mfr. Part No.LM336Z25X
SGD0.432
Each (In a Pack of 50)
units
2.5V TO-92 Programmable ±1.0 % Through Hole Shunt 15 (Reverse)mA - - - 3 - - 5.2 x 4.19 x 5.33mm
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. 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. 121-8848
Mfr. Part No.LM431BIM3/NOPB
SGD0.359
Each (On a Reel of 1000)
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 0.93mm
RS Stock No. 751-5228
Mfr. Part No.ZTL431AFTA
SGD0.226
Each (In a Pack of 50)
units
2.5V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 20 V 2.475 V 20 V 3 - - 3.04 x 1.4 x 1.02mm
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. 121-9572
Mfr. Part No.ZTL431AFTA
SGD0.099
Each (On a Reel of 3000)
units
2.5V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 20 V 2.475 V 20 V 3 - - 3.04 x 1.4 x 1.02mm
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