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. 921-0543
Mfr. Part No.AP4310AMTR-G1
HK$2.094
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. 169-7423
Mfr. Part No.ZHT431F02TA
HK$3.514
Each (On a Reel of 3000)
units
2.5V SOT-23 Adjustable ±2.0 % Surface Mount Shunt 100mA 20 V - 20 V 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 165-8339
Mfr. Part No.AP4310AMTR-G1
HK$1.301
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. 165-8407
Mfr. Part No.LM4040D30FTA
HK$1.585
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. 751-5221
Mfr. Part No.ZTL431AH6TA
HK$3.076
Each (On a Tape of 25)
units
2.5V SC-70 Adjustable ±1.0 % Surface Mount Shunt 100mA 20 V 2.475 V 20 V 6 - - 2 x 1.35 x 1mm
RS Stock No. 121-9495
Mfr. Part No.TL431ASA-7
HK$0.616
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
HK$2.036
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. 921-0720
Mfr. Part No.LM4040D30FTA
HK$2.633
Each (In a Pack of 20)
units
3V SOT-23 Fixed ±1.0 % Surface Mount Shunt 15mA - - - 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 165-8415
Mfr. Part No.ZXRE330ASA-7
HK$2.596
Each (On a Reel of 3000)
units
3.3V SOT-23 Fixed ±0.5 % Surface Mount Shunt 5mA - - - 3 - - 3 x 1.4 x 1mm
RS Stock No. 823-1794
Mfr. Part No.ZHT431F02TA
HK$4.03
Each (In a Pack of 10)
units
2.5V SOT-23 Adjustable ±2.0 % Surface Mount Shunt 100mA 20 V - 20 V 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 122-1254
Mfr. Part No.ZTL431AH6TA
HK$1.13
Each (On a Reel of 3000)
units
2.5V SC-70 Adjustable ±1.0 % Surface Mount Shunt 100mA 20 V 2.475 V 20 V 6 - - 2 x 1.35 x 1mm
RS Stock No. 921-0833
Mfr. Part No.ZXRE330ASA-7
HK$4.106
Each (In a Pack of 20)
units
3.3V SOT-23 Fixed ±0.5 % Surface Mount Shunt 5mA - - - 3 - - 3 x 1.4 x 1mm
RS Stock No. 121-9503
Mfr. Part No.AP432ASAG-7
HK$1.334
Each (On a Reel of 3000)
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. 922-8171
Mfr. Part No.ZRB500F02TA
HK$3.499
Each (On a Reel of 3000)
units
5V SOT-23 Fixed ±2.0 % Surface Mount Shunt 15mA - 4.9 V 5.1 V 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 738-5086
Mfr. Part No.ZHT431F01TA
HK$7.15
Each (In a Pack of 5)
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. 169-7372
Mfr. Part No.AP431SAG-7
HK$0.684
Each (On a Reel of 3000)
units
2.5 - 36V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 250mA - 2.52 V 36 V 3 - - 3 x 1.4 x 1.1mm
RS Stock No. 922-8522
Mfr. Part No.ZXRE4041DFTA
HK$3.413
Each (On a Reel of 3000)
units
1.225V SOT-23 Fixed ±1.0 % Surface Mount Shunt 12mA - 1.213 V 1.237 V 3 - 10 mV 3.04 x 1.4 x 1.02mm
RS Stock No. 922-8175
Mfr. Part No.ZRC330F03TA
HK$3.436
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. 146-0591
Mfr. Part No.AS431ANTR-G1
HK$0.363
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. 751-3001
Mfr. Part No.AP432ASAG-7
HK$2.511
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