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. 122-0333
Mfr. Part No.TLV431BFTA
$0.222
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. 738-5361
Mfr. Part No.TLV431BFTA
$0.459
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. 738-5333
Mfr. Part No.TL431ASA-7
$0.469
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. 121-9495
Mfr. Part No.TL431ASA-7
$0.148
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. 738-5109
Mfr. Part No.ZRB500F03TA
$1.08
Each (In a Pack of 5)
units
5V SOT-23 Fixed ±3 % Surface Mount Shunt 15mA - 4.85 V 5.15 V 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 122-0259
Mfr. Part No.LM4040D50FTA
$0.262
Each (On a Reel of 3000)
units
5V SOT-23 Fixed ±1.0 % Surface Mount Shunt 15mA - - 5 V 3 - 10 mV 3.04 x 1.4 x 1.02mm
RS Stock No. 146-0949
Mfr. Part No.AS431BNTR-G1
$0.068
Each (On a Reel of 3000)
units
2.5V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 36 V 2.5 V 36 V 3 - - 3 x 1.4 x 1.1mm
RS Stock No. 751-5228
Mfr. Part No.ZTL431AFTA
$0.33
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. 738-5112
Mfr. Part No.ZRC330F03TA
$1.05
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. 921-0657
Mfr. Part No.AS431BNTR-G1
$0.168
Each (In a Pack of 100)
units
2.5V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 36 V 2.5 V 36 V 3 - - 3 x 1.4 x 1.1mm
RS Stock No. 122-0331
Mfr. Part No.TLV431AE5TA
$0.221
Each (On a Reel of 3000)
units
1.24 - 18V SOT-25 Adjustable ±1.0 % Surface Mount Shunt 20mA 20 V 1.24 V 18 V 5 - - 3.1 x 1.8 x 1.3mm
RS Stock No. 165-8339
Mfr. Part No.AP4310AMTR-G1
$0.27
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. 154-891
Mfr. Part No.ZR431FTA
$0.735
Each (In a Pack of 10)
units
2.5 - 20V SOT-23 Adjustable ±2.0 % Surface Mount Shunt 100mA 20 V 2.5 V 20 V 3 - - 2.9 x 1.3 x 1mm
RS Stock No. 751-5219
Mfr. Part No.ZR431LF02TA
$0.46
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. 122-1444
Mfr. Part No.ZR40401F25TA
$0.624
Each (On a Reel of 3000)
units
2.5V SOT-23 Fixed ±1.0 % Surface Mount Shunt 15mA - 2.475 V 2.525 V 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 169-7423
Mfr. Part No.ZHT431F02TA
$0.989
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. 822-8846
Mfr. Part No.AP431SAG-7
$0.234
Each (In a Pack of 50)
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. 738-5358
Mfr. Part No.TL432ASA-7
$0.201
Each (On a Tape 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. 122-0335
Mfr. Part No.TLV431AFTA
$0.237
Each (On a Reel of 3000)
units
1.24 - 18V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 20mA 20 V 1.24 V 18 V 3 - - 3.04 x 1.4 x 1.02mm
RS Stock No. 922-7601
Mfr. Part No.ZR431FTA
$0.369
Each (On a Reel of 3000)
units
2.5 - 20V SOT-23 Adjustable ±2.0 % Surface Mount Shunt 100mA 20 V 2.5 V 20 V 3 - - 2.9 x 1.3 x 1mm