Voltage References

Voltage references are electronic devices that provide a fixed output voltage. They provide a constant voltage regardless of external factors. This includes the load on the device, temperature or fluctuations in the power supply. Learn more in our Complete Guide to Voltage References.

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.

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%.

Voltage reference ICs come in a standard semiconductor package, such as PDIP, SO, SOIC and SOT-23. The pin count may also be combined with the package type, for example SO-8.

Types of voltage references

  • Two-terminal shunt voltage reference
  • Three-terminal series voltage reference
  • Band-gap voltage reference
  • Low noise voltage reference
  • Micropower voltage reference

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 analogue-to-digital converters. They are also used in scientific applications and in medical equipment where voltage variations need to be tested regularly. Voltage references are also used in battery-powered devices.


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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. 159-7584
Mfr. Part No.ADR02AKSZ-REEL7
HK$17.892
Each (On a Reel of 3000)
units
5V SC-70 Fixed ±0.1 % Through Hole Series 10mA 36 V 4.995 V 5.005 V 5 40 ppm/V 80 ppm/mA 2.2 x 1.35 x 1mm
RS Stock No. 759-0446
Mfr. Part No.ADR02AKSZ-REEL7
HK$26.15
Each
units
5V SC-70 Fixed ±0.1 % Through Hole Series 10mA 36 V 4.995 V 5.005 V 5 40 ppm/V 80 ppm/mA 2.2 x 1.35 x 1mm
RS Stock No. 779-8909
Mfr. Part No.LM329BZ#PBF
HK$31.93
Each (In a Pack of 2)
units
6.9V TO-92 Fixed ±5 % Through Hole Shunt 15mA - - 6.9 V 3 - - 4.572 x 4.572 x 3.556mm
RS Stock No. 709-1545
Mfr. Part No.AD1582BRTZ-REEL7
HK$21.388
Each (In a Pack of 5)
units
2.5V SOT-23 Fixed ±0.08 % Surface Mount Series 5mA 12 V 2.498 V 2.502 V 3 25 μV/V 3.5 mV/mA 2.9 x 1.3 x 1.02mm
RS Stock No. 412-349
Mfr. Part No.ADR02ARZ
HK$26.88
Each (In a Pack of 5)
units
5V SOIC Fixed ±0.1 % Surface Mount Series 10mA 36 V 4.995 V 5.005 V 8 30 ppm/V 70 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 522-9076
Mfr. Part No.REF02CPZ
HK$39.00
Each
units
5V PDIP Fixed ±1.0 % Through Hole Series 8mA 40 V 4.95 V 5.05 V 8 150 ppm/V 150 ppm/mA 9.27 x 7.24 x 3.43mm
RS Stock No. 708-9491
Mfr. Part No.AD581SH
HK$287.33
Each
units
10V TO-5 Fixed ±0.3 % Through Hole Series 10mA 40 V - - 3 0.005 %/V 500 μV/mA 9.4 x 9.4 x 4.7mm
RS Stock No. 709-5308
Mfr. Part No.ADR444BRZ
HK$86.13
Each
units
4.096V SOIC Fixed ±0.04 % Surface Mount Series 10mA 20 V 4.094 V 4.098 V 8 20 ppm/V 50 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 822-5907
Mfr. Part No.LT1634BCS8-1.25#PBF
HK$54.075
Each (In a Pack of 2)
units
1.25V SOIC Fixed ±0.05 % Surface Mount Shunt 1µA - 1.25 V 5 V 8 - - 5.004 x 3.98 x 1.498mm
RS Stock No. 758-9727
Mfr. Part No.AD688AQ
HK$391.37
Each
units
10V CERDIP Fixed ±0.05 % Through Hole Series 10mA 36 V - 10 V 16 ±200 μV/V ±200 μV/mA 21.34 x 7.87 x 3.56mm
RS Stock No. 764-8753
Mfr. Part No.ADR3425ARJZ-R2
HK$38.13
Each
units
2.5V SOT-23 Fixed ±0.1 % Surface Mount Series 10mA 5.5 V 2.498 V 2.503 V 6 120 ppm/V 50 ppm/mA 3 x 1.7 x 1.3mm
RS Stock No. 759-2938
Mfr. Part No.ADR02ARZ-REEL7
HK$25.12
Each
units
5V SOIC Fixed ±0.1 % Surface Mount Series 10mA 36 V 4.995 V 5.005 V 8 40 ppm/V 80 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 709-5415
Mfr. Part No.AD586MNZ
HK$155.07
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. 158-1979
Mfr. Part No.AD1582BRTZ-REEL7
HK$13.129
Each (On a Reel of 3000)
units
2.5V SOT-23 Fixed ±0.08 % Surface Mount Series 5mA 12 V 2.498 V 2.502 V 3 25 μV/V 3.5 mV/mA 2.9 x 1.3 x 1.02mm
RS Stock No. 697-7754
Mfr. Part No.ADR435BRZ
HK$92.16
Each
units
5V SOIC Fixed ±0.04 % Surface Mount Series 30mA 20 V 4.998 V 5.002 V 8 20 ppm/V 15 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 912-9911
Mfr. Part No.ADR3425ARJZ-R2
HK$26.047
Each (On a Reel of 250)
units
2.5V SOT-23 Fixed ±0.1 % Surface Mount Series 10mA 5.5 V 2.498 V 2.503 V 6 120 ppm/V 50 ppm/mA 3 x 1.7 x 1.3mm
RS Stock No. 522-8859
Mfr. Part No.AD586JNZ
HK$94.07
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. 538-6573
Mfr. Part No.ADR03BRZ
HK$59.34
Each
units
2.5V SOIC Fixed ±0.1 % Surface Mount Series 10mA 36 V 2.498 V 2.503 V 8 30 ppm/V 70 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 111-1104
Mfr. Part No.REF02CPZ
HK$32.078
Each (In a Tube of 50)
units
5V PDIP Fixed ±1.0 % Through Hole Series 8mA 40 V 4.95 V 5.05 V 8 150 ppm/V 150 ppm/mA 9.27 x 7.24 x 3.43mm
RS Stock No. 779-9167
Mfr. Part No.LT1236AIS8-10#PBF
HK$81.17
Each
units
10V SOIC Fixed ±0.05 % Surface Mount Series 10mA 40 V 9.95 V 10.05 V 8 6 ppm/V 40 ppm/mA 5.004 x 3.988 x 1.498mm