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. 124-2435
Mfr. Part No.TL431BQDBZR,215
BrandNexperia
PHP6.423
Each (On a Reel of 3000)
units
2.5 - 36V SOT-23 Adjustable 0.5% Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 809-5374
Mfr. Part No.TL431AILP
PHP20.48
Each (In a Pack of 5)
units
2.5 - 36V TO-92 Adjustable ±1.0 % Through Hole Shunt 100mA - - 36 V 3 - - 5.21 x 4.19 x 5.34mm
RS Stock No. 534-2854
Mfr. Part No.LM385Z/NOPB
PHP46.73
Each
units
1.24 - 5.3V TO-92 Adjustable ±2.0 % Through Hole Shunt 20mA - 1.24 V 5.3 V 3 - 15 mV 5.2 x 4.19 x 5.2mm
RS Stock No. 162-5897
Mfr. Part No.TL431AIDBZR
PHP5.78
Each (On a Reel of 3000)
units
2.5 - 36V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 3 - - 2.92 x 1.3 x 1mm
RS Stock No. 661-9518
Mfr. Part No.TL431AIDBZR
PHP16.28
Each (In a Pack of 10)
units
2.5 - 36V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 3 - - 2.92 x 1.3 x 1mm
RS Stock No. 912-8740
Mfr. Part No.AD586LRZ
PHP532.88
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. 497-1912
Mfr. Part No.ADR425BRZ
PHP541.28
Each
units
5V SOIC Fixed ±0.04 % Surface Mount Series 10mA 18 V 4.998 V 5.002 V 8 35 ppm/V 70 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 121-8695
Mfr. Part No.LM336Z-5.0/NOPB
PHP17.75
Each (In a Box of 1800)
units
5V TO-92 Fixed ±1.0 % Through Hole Shunt 10mA - 4.8 V 5.2 V 3 - 20 mV 5.2 x 4.19 x 5.2mm
RS Stock No. 912-7220
Mfr. Part No.AD587JRZ
PHP320.25
Each (In a Tube of 98)
units
10V SOIC Fixed ±0.1 % Surface Mount Series 10mA 36 V 9.99 V 10.01 V 8 100 μV/V 100 μV/mA 5 x 4 x 1.5mm
RS Stock No. 527-984
Mfr. Part No.TL431AILP
PHP16.80
Each (In a Pack of 25)
units
2.5 - 36V TO-92 Adjustable ±1.0 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 4.83 x 3.43 x 3.68mm
RS Stock No. 919-9036
Mfr. Part No.LT1029CZPBF
PHP240.641
Each (In a Tube of 100)
units
5V TO-92 Fixed ±0.2 % Through Hole Shunt 10mA - 4.95 V 5.05 V 3 - - 4.572 x 3.556 x 4.572mm
RS Stock No. 162-4864
Mfr. Part No.TL431ACD
PHP17.33
Each (In a Tube of 75)
units
2.5 - 36V SOIC Adjustable ±1.0 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 8 - - 4.9 x 3.91 x 1.58mm
RS Stock No. 661-9350
Mfr. Part No.LM4040D25IDBZR
PHP40.43
Each (In a Pack of 5)
units
2.5V SOT-23 Fixed ±1.0 % Surface Mount Shunt 15mA - - - 3 - 8 mV 2.92 x 1.3 x 1mm
RS Stock No. 661-9534
Mfr. Part No.TL431BIDBZT
PHP45.68
Each (In a Pack of 5)
units
2.5 - 36V SOT-23 Adjustable ±0.5 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 3 - - 2.92 x 1.3 x 1mm
RS Stock No. 814-3758
Mfr. Part No.REF3330AIDBZT
PHP138.202
Each (In a Pack of 5)
units
3V SOT-23 Fixed ±0.15 % Surface Mount Series 30mA 5.5 V - - 3 30 ppm/V 20 ppm/V 3.04 x 1.4 x 1.02mm
RS Stock No. 913-0712
Mfr. Part No.REF195ESZ
PHP243.543
Each (In a Tube of 98)
units
5V SOIC Fixed ±0.04 % Surface Mount Series 30mA 18 V 4.998 V 5.002 V 8 4 ppm/V 4 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 168-4849
Mfr. Part No.TL431ACDR
PHP5.09
Each (On a Reel of 2500)
units
2.5 - 36V SOIC Adjustable ±1.0 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 8 - - 4.9 x 3.91 x 1.58mm
RS Stock No. 797-4838
Mfr. Part No.TL431BQDBZR,215
BrandNexperia
PHP18.388
Each (In a Pack of 25)
units
2.5 - 36V SOT-23 Adjustable ±0.5 % Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 714-7822
Mfr. Part No.TL431AIZT
PHP14.23
Each (In a Pack of 20)
units
2.5 - 36V TO-92 Adjustable ±1.0 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 4.7 x 3.7 x 4.4mm
RS Stock No. 922-2482
Mfr. Part No.LM4040D25IDBZT
PHP40.11
Each (On a Reel of 250)
units
2.5V SOT-23 Fixed ±1.0 % Surface Mount Shunt 15mA - - - 3 - 8 mV 2.92 x 1.3 x 1mm
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