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. 460-932
Mfr. Part No.LM336M-5.0/NOPB
$1.007
Each (In a Pack of 10)
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. 154-6181
Mfr. Part No.LT1790BIS6-5#TRMPBF
$4.289
Each (On a Reel of 500)
units
5V TSOT-23 Fixed ±0.1 % Surface Mount Series - 20 V 4.995 V 5.005 V 6 220 ppm/V 250 ppm/V, 300 ppm/V 2.9 x 1.75 x 0.9mm
RS Stock No. 166-2430
Mfr. Part No.KA431AZTA
$0.08
Each (On a Tape of 2000)
units
2.5 - 36V TO-92 Programmable ±1.0 % Through Hole Shunt 100mA - 2.5 V 36 V 3 - - 4.58 x 3.86 x 4.58mm
RS Stock No. 535-9616
Mfr. Part No.LM4040CIM3-4.1/NOPB
$0.968
Each (In a Pack of 5)
units
4.1V SOT-23 Fixed ±0.5 % Surface Mount Shunt 15mA - - - 3 - 7 mV 2.92 x 1.3 x 0.93mm
RS Stock No. 121-8838
Mfr. Part No.LM4040AIM3-3.0/NOPB
$1.25
Each (On a Reel of 1000)
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. 121-8839
Mfr. Part No.LM4040BIM3-2.5/NOPB
$0.773
Each (On a Reel of 1000)
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. 761-5911
Mfr. Part No.LM4050CIM3-2.5/NOPB
$2.516
Each (In a Pack of 5)
units
2.5V SOT-23 Fixed ±0.1 % Surface Mount Shunt 15mA - - 2.5 V 3 - - 2.92 x 1.3 x 0.93mm
RS Stock No. 709-8720
Mfr. Part No.REF3240AIDBVT
$5.25
Each
units
4.096V SOT-23 Fixed ±0.2 % Surface Mount Series 10mA 7.5 V 4.088 V 4.104 V 6 65 ppm/V 60 μV/mA 2.9 x 1.6 x 1.15mm
RS Stock No. 661-9408
Mfr. Part No.LM4041D12IDBZR
$1.01
Each (In a Pack of 5)
units
1.225V SOT-23 Fixed ±1.0 % Surface Mount Shunt 12mA - - - 3 - 8 mV 2.92 x 1.3 x 1mm
RS Stock No. 761-5905
Mfr. Part No.LM4040DIZ-4.1/NOPB
$0.814
Each (In a Pack of 5)
units
4.096V TO-92 Fixed ±1.0 % Through Hole Shunt 15mA - - 4.1 V 3 - - 5.2 x 4.19 x 5.2mm
RS Stock No. 145-6560
Mfr. Part No.LM4040C25IDBZT
$0.943
Each (On a Reel of 250)
units
2.5V SOT-23 Fixed ±0.5 % Surface Mount Shunt 15mA - - - 3 - 6 mV 2.92 x 1.3 x 1mm
RS Stock No. 535-9521
Mfr. Part No.LM4040AIM3-3.0/NOPB
$2.536
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. 162-9967
Mfr. Part No.LM385BZ-1.2G
$0.405
Each (In a Bag of 2000)
units
1.235V TO-92 Fixed ±1.0 % Through Hole Shunt - - - - 3 - - 5.2 x 4.19 x 5.33mm
RS Stock No. 145-6977
Mfr. Part No.REF3240AIDBVT
$5.064
Each (On a Reel of 250)
units
4.096V SOT-23 Fixed ±0.2 % Surface Mount Series 10mA 7.5 V 4.088 V 4.104 V 6 65 ppm/V 60 μV/mA 2.9 x 1.6 x 1.15mm
RS Stock No. 738-5112
Mfr. Part No.ZRC330F03TA
$1.102
Each (On a Tape of 5)
units
3.3V SOT-23 Fixed ±3 % Surface Mount Shunt 5mA - 3.2 V 3.4 V 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 922-8175
Mfr. Part No.ZRC330F03TA
$0.575
Each (On a Reel of 3000)
units
3.3V SOT-23 Fixed ±3 % Surface Mount Shunt 5mA - 3.2 V 3.4 V 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 169-7438
Mfr. Part No.ZXRE060ET5TA
$0.816
Each (On a Reel of 3000)
units
- TSOT-23 Adjustable ±1.0 % Surface Mount Shunt 15mA 18 V 0.2 V 18 V 5 1.5 mV 10 mV 2.9 x 1.6 x 0.9mm
RS Stock No. 714-1114
Mfr. Part No.TL431CDT
$0.084
Each (In a Pack of 20)
units
2.5 - 36V SOIC Adjustable ±2.0 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 8 - - 4.9 x 3.9 x 1.25mm
RS Stock No. 912-8740
Mfr. Part No.AD586LRZ
$13.152
Each (In a Tube of 98)
units
5V SOIC Fixed ±0.05 % Surface Mount Series 10mA 36 V 4.998 V 5.003 V 8 100 μV/V 400 μV/mA 5 x 4 x 1.5mm
RS Stock No. 461-9563
Mfr. Part No.REF3040AIDBZT
$2.114
Each (In a Pack of 5)
units
4.096V SOT-23 Fixed ±0.2 % Surface Mount Series 25mA 7 V 4.088 V 4.104 V 3 410 μV/V 100 μV/mA 2.92 x 1.3 x 1mm
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