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. 889-5815
Mfr. Part No.MCP1541T-I/TT
BrandMicrochip
R 6.709
Each (On a Reel of 3000)
units
4.096V SOT-23 Precision 1% Surface Mount Series 20mA 7 V 4.055 V 4.137 V 3 350 μV/V 1.3 mV/mA 2.9 x 1.3 x 0.95mm
RS stock no. 698-9047
Mfr. Part No.MCP1541T-I/TT
BrandMicrochip
R 15.42
Each
units
4.096V SOT-23 Precision 1% Surface Mount Series 20mA 7 V 4.055 V 4.137 V 3 350 μV/V 1.3 mV/mA 2.9 x 1.3 x 0.95mm
RS stock no. 681-1083
Mfr. Part No.MCP1541-I/TO
BrandMicrochip
R 15.895
Each (In a Pack of 2)
units
4.096V TO-92 Fixed ±1.0 % Through Hole Series 20mA 7 V 4.055 V 4.137 V 3 350 μV/V 1.3 mV/mA 4.71 x 3.62 x 4.62mm
RS stock no. 165-4661
Mfr. Part No.MCP1541-I/TO
BrandMicrochip
R 8.875
Each (In a Bag of 1000)
units
4.096V TO-92 Fixed ±1.0 % Through Hole Series 20mA 7 V 4.055 V 4.137 V 3 350 μV/V 1.3 mV/mA 4.71 x 3.62 x 4.62mm
RS stock no. 165-4708
Mfr. Part No.MCP1501-10E/SN
BrandMicrochip
R 7.233
Each (In a Tube of 100)
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. 178-5337
Mfr. Part No.LM4041DYM3-1.2-TR
BrandMicrochip
R 1.888
Each (On a Reel of 3000)
units
1.225V SOT-23 Fixed ±1.0 % Surface Mount Shunt - - - 1.225 V 3 - - 2.92 x 1.3 x 1mm
RS stock no. 911-2941
Mfr. Part No.LM4041DYM3-1.2-TR
BrandMicrochip
R 1.963
Each (In a Pack of 25)
units
1.225V SOT-23 Fixed ±1.0 % Surface Mount Shunt - - - 1.225 V 3 - - 2.92 x 1.3 x 1mm
RS stock no. 111-5568
Mfr. Part No.MCP1501-10E/SN
BrandMicrochip
R 7.327
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. 738-6358
Mfr. Part No.MCP1525-I/TO
BrandMicrochip
R 11.432
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
RS stock no. 144-9108
Mfr. Part No.MCP1501-33E/SN
BrandMicrochip
R 8.749
Each (In a Tube of 100)
units
3.3V SOIC Fixed ±0.08 % Surface Mount Series 30mA 5.5 V 3.29 V 3.3 V 8 50 ppm/V 40 (Sink) ppm/mA, 70 (Source) ppm/mA 4.9 x 3.9 x 1.5mm
RS stock no. 111-5569
Mfr. Part No.MCP1501-33E/SN
BrandMicrochip
R 11.401
Each (In a Pack of 10)
units
3.3V SOIC Fixed ±0.08 % Surface Mount Series 30mA 5.5 V 3.29 V 3.3 V 8 50 ppm/V 40 (Sink) ppm/mA, 70 (Source) ppm/mA 4.9 x 3.9 x 1.5mm
RS stock no. 698-9069
Mfr. Part No.MCP1525T-I/TT
BrandMicrochip
R 15.16
Each
units
2.5V SOT-23 Fixed ±1.0 % Surface Mount Series 20mA 7 V 2.475 V 2.525 V 3 350 μV/V 1.3 mV/mA 2.9 x 1.3 x 0.95mm
RS stock no. 889-5137
Mfr. Part No.MCP1525T-I/TT
BrandMicrochip
R 8.719
Each (On a Reel of 3000)
units
2.5V SOT-23 Fixed ±1.0 % Surface Mount Series 20mA 7 V 2.475 V 2.525 V 3 350 μV/V 1.3 mV/mA 2.9 x 1.3 x 0.95mm
RS stock no. 165-3596
Mfr. Part No.MCP1525-I/TO
BrandMicrochip
R 8.78
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. 111-5566
Mfr. Part No.MCP1501-20E/SN
BrandMicrochip
R 11.401
Each (In a Pack of 10)
units
2.04V SOIC Fixed ±0.08 % Surface Mount Series 30mA 5.5 V 2.04 V 2.05 V 8 50 ppm/V 40 (Sink) ppm/mA, 70 (Source) ppm/mA 4.9 x 3.9 x 1.5mm
RS stock no. 177-3273
Mfr. Part No.LM4040CYM3-2.5-TR
BrandMicrochip
R 4.056
Each (In a Pack of 50)
units
2.5V SOT-23 Precision ±0.5% Surface Mount Shunt 15mA 15 V - 2.5 V 3 - - 0.9 x 2.92 x 1.3mm
RS stock no. 177-2826
Mfr. Part No.LM4040DYM3-2.5-TR
BrandMicrochip
R 3.308
Each (On a Reel of 3000)
units
2.5V SOT-23 Precision ±1% Surface Mount Shunt 15mA 15 V - 2.5 V 3 - - 0.9 x 2.92 x 1.3mm
RS stock no. 177-2824
Mfr. Part No.LM4040CYM3-2.5-TR
BrandMicrochip
R 3.502
Each (On a Reel of 3000)
units
2.5V SOT-23 Precision ±0.5% Surface Mount Shunt 15mA 15 V - 2.5 V 3 - - 0.9 x 2.92 x 1.3mm
RS stock no. 177-2964
Mfr. Part No.LM4040DYM3-2.5-TR
BrandMicrochip
R 3.662
Each (In a Pack of 50)
units
2.5V SOT-23 Precision ±1% Surface Mount Shunt 15mA 15 V - 2.5 V 3 - - 0.9 x 2.92 x 1.3mm
RS stock no. 111-5571
Mfr. Part No.MCP1501-12E/SN
BrandMicrochip
R 7.346
Each (In a Pack of 10)
units
1.25V SOIC Fixed ±0.08 % Surface Mount Series 30mA 5.5 V 1.24 V 1.25 V 8 50 ppm/V 40 (Sink) ppm/mA, 70 (Source) ppm/mA 4.9 x 3.9 x 1.5mm