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. 155-6695
Mfr. Part No.LT1461CIS8-2.5#PBF
$4.104
Each (In a Tube of 100)
units
2.5V SOIC Fixed ±0.08 % Surface Mount Series 100mA 20 V - 2.5 V 8 12 ppm/V 40 ppm/mA 5.004 x 3.988 x 1.498mm
RS Stock No. 714-7816
Mfr. Part No.TL431ACZ-AP
$0.461
Each (In a Pack of 50)
units
2.5 - 36V TO-92AP Adjustable ±1.0 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 5 x 4 x 5mm
RS Stock No. 739-0300
Mfr. Part No.KA431AZTA
$0.347
Each (In a Pack of 10)
units
2.5 - 36V TO-92 Programmable ±1.0 % Through Hole Shunt 100mA - 2.5 V 36 V 3 - - 4.58 x 3.86 x 4.58mm
RS Stock No. 145-6977
Mfr. Part No.REF3240AIDBVT
$5.44
Each (On a Reel of 250)
units
4.096V SOT-23 Fixed ±0.2 % Surface Mount Series 10mA 7.5 V 4.088 V 4.104 V 6 65 ppm/V 60 μV/mA 2.9 x 1.6 x 1.15mm
RS Stock No. 535-9559
Mfr. Part No.LM4040BIM3-2.5/NOPB
$2.11
Each (In a Pack of 5)
units
2.5V SOT-23 Fixed ±0.2 % Surface Mount Shunt 15mA - - - 3 - 6 mV 2.92 x 1.3 x 0.93mm
RS Stock No. 533-5806
Mfr. Part No.LM336Z-5.0/NOPB
$0.79
Each
units
5V TO-92 Precision 1% Through Hole Shunt 10mA - 4.8 V 5.2 V 3 - 20 mV 5.2 x 4.19 x 5.2mm
RS Stock No. 121-8561
Mfr. Part No.REF3040AIDBZT
$1.33
Each (On a Reel of 250)
units
- - - - - - - - - - - - - -
RS Stock No. 751-5394
Mfr. Part No.ZXRE125EFTA
$1.88
Each (In a Pack of 5)
units
1.22V SOT-23 Fixed ±0.5 % Surface Mount Shunt 20mA - 1.196 V 1.244 V 3 - 10 mV 3.04 x 1.4 x 1.02mm
RS Stock No. 427-183
Mfr. Part No.AD586LRZ
$20.91
Each
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. 162-5833
Mfr. Part No.LM4041D12IDBZR
$0.428
Each (On a Reel of 3000)
units
1.225V SOT-23 Fixed ±1.0 % Surface Mount Shunt 12mA - - - 3 - 8 mV 2.92 x 1.3 x 1mm
RS Stock No. 162-9967
Mfr. Part No.LM385BZ-1.2G
$0.436
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. 709-5415
Mfr. Part No.AD586MNZ
$29.17
Each
units
5V PDIP Fixed ±0.04 % Through Hole Series 10mA 36 V 4.998 V 5.002 V 8 100 μV/V 400 μV/mA 9.27 x 7.24 x 3.43mm
RS Stock No. 761-5905
Mfr. Part No.LM4040DIZ-4.1/NOPB
$1.008
Each (In a Pack of 5)
units
4.096V TO-92 Fixed ±1.0 % Through Hole Shunt 15mA - - 4.1 V 3 - - 5.2 x 4.19 x 5.2mm
RS Stock No. 111-5567
Mfr. Part No.MCP1501-25E/SN
BrandMicrochip
$1.19
Each (In a Pack of 10)
units
2.5V SOIC Fixed ±0.08 % Surface Mount Series 30mA 5.5 V 2.49 V 2.5 V 8 50 ppm/V 40 (Sink) ppm/mA, 70 (Source) ppm/mA 4.9 x 3.9 x 1.5mm
RS Stock No. 661-9502
Mfr. Part No.TL431ACDBZR
$0.439
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. 714-1114
Mfr. Part No.TL431CDT
$0.501
Each (In a Pack of 20)
units
2.5 - 36V SOIC Adjustable ±2.0 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 8 - - 4.9 x 3.9 x 1.25mm
RS Stock No. 169-7438
Mfr. Part No.ZXRE060ET5TA
$0.634
Each (On a Reel of 3000)
units
- TSOT-23 Adjustable ±1.0 % Surface Mount Shunt 15mA 18 V 0.2 V 18 V 5 1.5 mV 10 mV 2.9 x 1.6 x 0.9mm
RS Stock No. 661-9326
Mfr. Part No.LM4040C25IDBZT
$2.192
Each (In a Pack of 5)
units
2.5V SOT-23 Fixed ±0.5 % Surface Mount Shunt 15mA - - - 3 - 6 mV 2.92 x 1.3 x 1mm
RS Stock No. 823-2463
Mfr. Part No.ZXRE060ET5TA
$1.07
Each (In a Pack of 10)
units
0.6V TSOT-23 Adjustable ±1.0 % Surface Mount Shunt 15mA 18 V 0.2 V 18 V 5 1.5 mV 10 mV 2.9 x 1.6 x 0.9mm
RS Stock No. 535-9521
Mfr. Part No.LM4040AIM3-3.0/NOPB
$3.076
Each (In a Pack of 5)
units
3V SOT-23 Fixed ±0.1 % Surface Mount Shunt 15mA 37 V - - 3 - 6 mV 2.92 x 1.3 x 0.93mm
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