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. 463-482
Mfr. Part No.LM385Z-1.2G
HK$3.435
Each (In a Pack of 10)
units
1.235V TO-92 Fixed ±2.0 % Through Hole Shunt 20mA - 1.205 V 1.26 V 3 - 20 mV 5.2 x 4.19 x 5.33mm
RS Stock No. 101-8304
Mfr. Part No.LM385Z-1.2G
HK$1.979
Each (In a Bag of 2000)
units
1.235V TO-92 Fixed ±2.0 % Through Hole Shunt 20mA - 1.205 V 1.26 V 3 - 20 mV 5.2 x 4.19 x 5.33mm
RS Stock No. 776-0759
Mfr. Part No.NCP431ACSNT1G
HK$1.951
Each (In a Pack of 10)
units
2.5 - 36V SOT-23 Programmable ±1.0 % Surface Mount Shunt 100mA - 2.475 V 36 V 3 - - 3.04 x 1.4 x 1.01mm
RS Stock No. 163-1004
Mfr. Part No.NCP431ACSNT1G
HK$0.629
Each (On a Reel of 3000)
units
2.5 - 36V SOT-23 Programmable ±1.0 % Surface Mount Shunt 100mA - 2.475 V 36 V 3 - - 3.04 x 1.4 x 1.01mm
RS Stock No. 145-3275
Mfr. Part No.TL431CLPG
HK$0.699
Each (In a Bag of 2000)
units
2.5 - 36V TO-92 Adjustable ±2.2 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 5.2 x 4.19 x 5.33mm
RS Stock No. 463-246
Mfr. Part No.TL431CLPG
HK$2.222
Each (In a Pack of 50)
units
2.5 - 36V TO-92 Adjustable ±2.2 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 5.2 x 4.19 x 5.33mm
RS Stock No. 808-3959
Mfr. Part No.CAT102TDI-GT3
HK$5.029
Each (In a Pack of 10)
units
0.6V TSOT-23 Adjustable ±1.0 % Surface Mount Shunt - 20 V 20 V - 5 1 mV 8 mV 2.9 x 1.6 x 0.9mm
RS Stock No. 163-0424
Mfr. Part No.CAT102TDI-GT3
HK$3.88
Each (On a Reel of 3000)
units
- TSOT-23 Adjustable ±1.0 % Surface Mount Shunt - 20 V 20 V - 5 1 mV 8 mV 2.9 x 1.6 x 0.9mm
RS Stock No. 163-0923
Mfr. Part No.LM385BZ-2.5G
HK$2.353
Each (In a Bag of 2000)
units
2.5V TO-92 Fixed ±1.5 % Through Hole Shunt 20mA - - 2.5 V 3 - - 5.2 x 4.19 x 5.33mm
RS Stock No. 163-1234
Mfr. Part No.TLV431BSN1T1G
HK$1.15
Each (On a Reel of 3000)
units
1.24 - 16V SOT-23 Adjustable ±0.5 % Surface Mount Shunt 20mA - 1.24 V 16 V 3 - - 3.04 x 1.04 x 1.01mm
RS Stock No. 781-5553
Mfr. Part No.TLV431BSN1T1G
HK$2.426
Each (In a Pack of 20)
units
1.24 - 16V SOT-23 Adjustable ±0.5 % Surface Mount Shunt 20mA - 1.24 V 16 V 3 - - 3.04 x 1.04 x 1.01mm
RS Stock No. 774-3486
Mfr. Part No.LM385BZ-2.5G
HK$4.424
Each (In a Pack of 5)
units
2.5V TO-92 Fixed ±1.5 % Through Hole Shunt 20mA - - 2.5 V 3 - - 5.2 x 4.19 x 5.33mm
RS Stock No. 163-2419
Mfr. Part No.LM385Z-2.5G
HK$2.196
Each (In a Bag of 2000)
units
2.5V TO-92 Fixed ±3 % Through Hole Shunt 20mA - 2.425 V 2.575 V 3 - 20 mV 5.2 x 4.19 x 5.33mm
RS Stock No. 862-4922
Mfr. Part No.LM385BZ-1.2G
HK$4.136
Each (In a Pack of 25)
units
1.235V TO-92 Fixed ±1.0 % Through Hole Shunt - - - - 3 - - 5.2 x 4.19 x 5.33mm
RS Stock No. 162-9967
Mfr. Part No.LM385BZ-1.2G
HK$2.33
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. 463-498
Mfr. Part No.LM385Z-2.5G
HK$3.742
Each (In a Pack of 10)
units
2.5V TO-92 Fixed ±3 % Through Hole Shunt 20mA - 2.425 V 2.575 V 3 - 20 mV 5.2 x 4.19 x 5.33mm
RS Stock No. 671-0292
Mfr. Part No.LM336Z5
HK$2.77
Each (In a Pack of 5)
units
5V TO-92 Programmable ±1.0 % Through Hole Shunt 400mA - 4.8 V 5.2 V 3 - 20 mV 4.58 x 3.86 x 4.58mm
New
RS Stock No. 186-8906
Mfr. Part No.NCP431BISNT1G
HK$1.597
Each (On a Reel of 3000)
units
2.5V SOT-23 Programmable 0.5% Surface Mount Shunt - 2.51 V - 36 V 3 - - 3.04 x 1.4 x 1.01mm
RS Stock No. 806-4673
Mfr. Part No.LM336Z25X
HK$0.864
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
New
RS Stock No. 186-8938
Mfr. Part No.TL431BIDG
HK$3.057
Each (In a Tube of 98)
units
2.49V SOIC Programmable 0.4% Surface Mount Shunt - 2.51 V - 36 V 8 - - 5 x 4 x 1.5mm