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
New
RS Stock No. 197-2537
Mfr. Part No.ISL60002BIH325Z-TK
HK$53.43
Each (In a Pack of 2)
units
- - - - - - - - - - - - - -
RS Stock No. 704-7065
Mfr. Part No.ISL60002CIH325Z-TK
HK$31.85
Each
units
2.5V SOT-23 Fixed ±0.1 % Surface Mount Series 7mA 6.5 V - - 3 250 μV/V 150 μV/mA 3.04 x 1.4 x 0.94mm
New
RS Stock No. 197-2523
Mfr. Part No.ISL21010CFH330Z-TK
HK$15.652
Each (In a Pack of 5)
units
- - - - - - - - - - - - - -
New
RS Stock No. 197-2536
Mfr. Part No.ISL60002BIH325Z-TK
HK$28.033
Each (On a Reel of 1000)
units
- - - - - - - - - - - - - -
New
RS Stock No. 197-2525
Mfr. Part No.ISL21080CIH315Z-TK
HK$7.578
Each (On a Reel of 1000)
units
- - - - - - - - - - - - - -
RS Stock No. 548-5434
Mfr. Part No.UPC1944GR-A
HK$5.93
Each
units
1.26 - 24V SOP Adjustable ±2.4 % Surface Mount Shunt 30mA 25 V - - 8 - - 5.2 x 4.4 x 1.49mm
New
RS Stock No. 197-2539
Mfr. Part No.ISL60002CIH325Z-TK
HK$34.42
Each (In a Pack of 5)
units
- - - - - - - - - - - - - -
New
RS Stock No. 197-2541
Mfr. Part No.ISL60002DIH325Z-TK
HK$24.978
Each (In a Pack of 5)
units
- - - - - - - - - - - - - -
New
RS Stock No. 197-2540
Mfr. Part No.ISL60002DIH325Z-TK
HK$12.193
Each (On a Reel of 1000)
units
- - - - - - - - - - - - - -
New
RS Stock No. 197-2527
Mfr. Part No.ISL21080CIH333Z-TK
HK$7.179
Each (On a Reel of 1000)
units
- - - - - - - - - - - - - -
New
RS Stock No. 197-2538
Mfr. Part No.ISL60002CIH325Z-TK
HK$18.119
Each (On a Reel of 1000)
units
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New
RS Stock No. 197-2521
Mfr. Part No.ISL21010CFH315Z-TK
HK$15.652
Each (In a Pack of 5)
units
- - - - - - - - - - - - - -
New
RS Stock No. 197-2522
Mfr. Part No.ISL21010CFH330Z-TK
HK$7.578
Each (On a Reel of 1000)
units
- - - - - - - - - - - - - -
New
RS Stock No. 197-2528
Mfr. Part No.ISL21080CIH333Z-TK
HK$14.628
Each (In a Pack of 5)
units
- - - - - - - - - - - - - -
New
RS Stock No. 197-2520
Mfr. Part No.ISL21010CFH315Z-TK
HK$7.578
Each (On a Reel of 1000)
units
- - - - - - - - - - - - - -
RS Stock No. 548-5456
Mfr. Part No.UPC1944T-AZ
HK$4.77
Each
units
1.26 - 24V SOT-89 Adjustable ±2.4 % Surface Mount Shunt 30mA 25 V - - 3 - - 4.5 x 2.5 x 1.5mm
New
RS Stock No. 197-2526
Mfr. Part No.ISL21080CIH315Z-TK
HK$15.652
Each (In a Pack of 5)
units
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