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. 522-8859
Mfr. Part No.AD586JNZ
TWD346.00
Each
units
5V PDIP Fixed ±0.4 % Through Hole Series 10mA 36 V 4.98 V 5.02 V 8 100 μV/V 400 μV/mA 9.27 x 7.24 x 3.43mm
RS Stock No. 166-3530
Mfr. Part No.KA431LZTA
TWD2.30
Each (On a Tape of 2000)
units
2.5 - 36V TO-92 Programmable ±0.5 % Through Hole Shunt - - - 36 V 3 - - 5.2 x 4.19 x 5.33mm
RS Stock No. 714-1105
Mfr. Part No.TL431ACDT
TWD9.70
Each (In a Pack of 20)
units
2.5 - 36V SOIC Adjustable ±1.0 % Surface Mount Shunt - - - - 8 - - -
RS Stock No. 527-306
Mfr. Part No.TL431ACDBZT
TWD21.00
Each (In a Pack of 25)
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. 165-9765
Mfr. Part No.TL431AQDBZR,215
BrandNexperia
TWD3.00
Each (On a Reel of 3000)
units
2.5 - 36V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 523-7011
Mfr. Part No.REF195GSZ
TWD117.00
Each
units
5V SOIC Fixed ±0.04 % Surface Mount Series 30mA 18 V 4.99 V 5.01 V 8 8 ppm/V 8 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 165-9762
Mfr. Part No.TL431AFDT,215
BrandNexperia
TWD3.50
Each (On a Reel of 3000)
units
2.5 - 36V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 37 V 2.495 V 36 V 3 - - 3 x 1.4 x 1mm
RS Stock No. 535-9341
Mfr. Part No.LM336BZ-5.0/NOPB
TWD42.20
Each (In a Pack of 5)
units
5V TO-92 Fixed ±1.0 % Through Hole Shunt 10mA - 4.9 V 5.1 V 3 - 20 mV 5.2 x 4.19 x 5.2mm
RS Stock No. 145-3275
Mfr. Part No.TL431CLPG
TWD3.20
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. 158-0184
Mfr. Part No.ADR435ARZ
TWD173.20
Each (In a Tube of 98)
units
5V SOIC Fixed ±0.13 % Surface Mount Series 30mA 20 V 4.994 V 5.006 V 8 20 ppm/V 15 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 688-9335
Mfr. Part No.TL431CDR2G
TWD15.50
Each (In a Pack of 2)
units
2.5 - 36V SOIC Adjustable ±2.2 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 8 - - 5 x 4 x 1.5mm
RS Stock No. 122-0101
Mfr. Part No.TL431BCDR2G
TWD5.60
Each (On a Reel of 2500)
units
2.5 - 36V SOIC Adjustable ±0.4 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 8 - - 5 x 4 x 1.5mm
RS Stock No. 160-9978
Mfr. Part No.AD680JTZ
TWD139.70
Each (In a Bag of 100)
units
2.5V TO-92 Fixed ±0.4 % Through Hole Series 10mA 36 V 2.49 V 2.51 V 3 40 μV/V 100 μV/mA 5.21 x 4.19 x 5.33mm
RS Stock No. 158-5248
Mfr. Part No.AD584KNZ
TWD541.50
Each (In a Tube of 50)
units
2.5V PDIP Programmable ±0.14 % Through Hole Series - 40 V - - 8 0.005 %/V 50 ppm/mA 9.91 x 6.35 x 3.3mm
RS Stock No. 165-3596
Mfr. Part No.MCP1525-I/TO
BrandMicrochip
TWD20.30
Each (In a Bag of 1000)
units
2.5V TO-92 Fixed ±1.0 % Through Hole Series 20mA 7 V - - 3 350 μV/V 1.3 mV/mA 4.71 x 3.62 x 4.62mm
RS Stock No. 165-7719
Mfr. Part No.TL431ACDT
TWD3.40
Each (On a Reel of 2500)
units
2.5 - 36V SOIC Adjustable ±1.0 % Surface Mount Shunt - - - - 8 - - -
RS Stock No. 738-5361
Mfr. Part No.TLV431BFTA
TWD13.90
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. 111-1130
Mfr. Part No.AD780ANZ
TWD355.10
Each (In a Tube of 50)
units
2.5 V, 3 V PDIP Programmable ±0.2 % Through Hole Series/Shunt 10mA 36 V 2.495 V, 2.995 V 2 V, 3 V 8 10 μV/V 75 μV/mA 9.27 x 7.24 x 3.43mm
RS Stock No. 779-8903
Mfr. Part No.LM399H#PBF
TWD412.00
Each
units
6.95V TO-46 Fixed ±5 % Through Hole Shunt 10mA - - 6.95 V 4 - - 10.389 (Dia.) x 5.943mm
RS Stock No. 709-5294
Mfr. Part No.ADR444ARMZ
TWD218.00
Each
units
4.096V MSOP Fixed ±0.13 % Surface Mount Series 10mA 20 V 4.091 V 4.101 V 8 20 ppm/V 50 ppm/mA 3 x 3 x 0.85mm