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. 738-5361
Mfr. Part No.TLV431BFTA
$0.669
Each (In a Pack of 25)
units
1.24 - 18V SOT-23 Adjustable ±0.5 % Surface Mount Shunt 20mA 20 V 1.24 V 18 V 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 122-0333
Mfr. Part No.TLV431BFTA
$0.272
Each (On a Reel of 3000)
units
1.24 - 18V SOT-23 Adjustable ±0.5 % Surface Mount Shunt 20mA 20 V 1.24 V 18 V 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 121-9495
Mfr. Part No.TL431ASA-7
$0.131
Each (On a Reel of 3000)
units
2.5 - 36V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 40 V 2.5 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 738-5333
Mfr. Part No.TL431ASA-7
$0.521
Each (In a Pack of 50)
units
2.5 - 36V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 40 V 2.5 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 751-5219
Mfr. Part No.ZR431LF02TA
$1.143
Each (On a Tape of 10)
units
1.24 - 10V SOT-23 Adjustable ±2.5 % Surface Mount Shunt 25mA - 1.24 V 10 V 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 122-1446
Mfr. Part No.ZXRE4041CFTA
$0.931
Each (On a Reel of 3000)
units
1.225V SOT-23 Fixed ±0.5 % Surface Mount Shunt 12mA - 1.219 V 1.231 V 3 - 10 mV 3.04 x 1.4 x 1.02mm
RS Stock No. 165-8407
Mfr. Part No.LM4040D30FTA
$0.295
Each (On a Reel of 3000)
units
3V SOT-23 Fixed ±1.0 % Surface Mount Shunt 15mA - - - 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 738-5103
Mfr. Part No.ZRC330F01TA
$1.954
Each (In a Pack of 5)
units
3.3V SOT-23 Fixed ±1.0 % Surface Mount Shunt 5mA - 3.27 V 3.33 V 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 751-5228
Mfr. Part No.ZTL431AFTA
$0.482
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. 751-5234
Mfr. Part No.ZTL432AFTA
$0.482
Each (On a Tape of 50)
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. 165-8409
Mfr. Part No.LM4040C30FTA
$0.359
Each (On a Reel of 3000)
units
2.5V SOT-23 Fixed ±0.5 % Surface Mount Shunt 15mA - - - 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 165-8369
Mfr. Part No.ZXRE330EV-A
$0.434
Each (On a Tape of 2000)
units
3.3V SOT-23 Fixed ±2.0 % Surface Mount Shunt 5mA - - - 3 - - 3 x 1.4 x 1mm
RS Stock No. 751-3001
Mfr. Part No.AP432ASAG-7
$1.052
Each (On a Tape of 25)
units
1.24 - 20V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 200mA 20 V 1.24 V 20 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 885-5653
Mfr. Part No.ZRC500F01TA
$1.665
Each (In a Pack of 10)
units
5V SOT-23 Fixed ±1.0 % Surface Mount Shunt 5mA 5 V - 5 V 3 - - 3 x 1.4 x 1.1mm
RS Stock No. 122-0258
Mfr. Part No.LM4040D25FTA
$0.295
Each (On a Reel of 3000)
units
2.5V SOT-23 Fixed ±1.0 % Surface Mount Shunt 15mA - - 2.5 V 3 - 10 mV 3.04 x 1.4 x 1.02mm
RS Stock No. 885-5656
Mfr. Part No.ZRB500F01TA
$1.665
Each (In a Pack of 10)
units
5V SOT-23 Fixed ±1.0 % Surface Mount Shunt 15mA 5 V - 5 V 3 - - 3 x 1.4 x 1.1mm
RS Stock No. 922-8513
Mfr. Part No.ZXRE125EFTA
$1.116
Each (On a Reel of 3000)
units
1.22V SOT-23 Fixed ±0.5 % Surface Mount Shunt 20mA - 1.196 V 1.244 V 3 - 10 mV 3.04 x 1.4 x 1.02mm
RS Stock No. 122-0304
Mfr. Part No.ZHT431F01TA
$0.917
Each (On a Reel of 3000)
units
2.5V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA - 2.5 V 20 V 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 165-8339
Mfr. Part No.AP4310AMTR-G1
$0.285
Each (On a Reel of 4000)
units
2.5V SOIC Fixed ±0.4 % Surface Mount Shunt 80mA 36 V - - 8 - - 5.1 x 4 x 1.45mm
RS Stock No. 122-1253
Mfr. Part No.ZR40402F50TA
$0.561
Each (On a Reel of 3000)
units
5V SOT-23 Fixed ±2.0 % Surface Mount Shunt 15mA - - 5 V 3 - - 3.05 x 1.4 x 1mm