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. 732-8049
Mfr. Part No.MAX6173BASA+
SGD8.02
Each
units
2.5V SOIC Fixed ±0.1 % Surface Mount Series 30mA 40 V 2.5 V 2.5 V 8 10 ppm/V 900 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 190-4439
Mfr. Part No.MAX6126AASA21+
SGD9.175
Each (In a Tube of 100)
units
2.04V SO Precision ±0.02% Surface Mount Series/Shunt - 12.6 V - - 8 40 μV/V 25 (Sourcing & Sink) μV/mA 5 x 4 x 1.5mm
RS Stock No. 190-0435
Mfr. Part No.REF01CSA+
SGD5.152
Each (In a Pack of 5)
units
10V SOIC Fixed ±1.0 % Surface Mount Series 500µA 30 V 9.9 V 10.1 V 8 0.018 %/V 0.018 %/mA 5 x 4 x 1.5mm
RS Stock No. 165-9638
Mfr. Part No.MAX6029ESA41+
SGD5.816
Each (In a Tube of 100)
units
4.096V SOIC Fixed ±0.15 % Surface Mount Series 4mA 12.6 V 2.0449 V 2.0511 V 8 200 μV/V 6.2 μV/VA 5 x 4 x 1.5mm
RS Stock No. 190-4440
Mfr. Part No.MAX6126AASA30+
SGD9.175
Each (In a Tube of 100)
units
3V SO Precision ±0.02% Surface Mount Series/Shunt - 12.6 V - - 8 50 μV/V 30 (Sourcing & Sink) μV/mA 5 x 4 x 1.5mm
RS Stock No. 190-0428
Mfr. Part No.MAX6250BESA+
SGD10.00
Each (In a Pack of 2)
units
5V SOIC Fixed ±0.02 % Surface Mount Series 15mA 36 V 5 V 5.01 V 8 35 ppm/V 7 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 190-4432
Mfr. Part No.MAX6037AAUKADJ+T
SGD3.642
Each (On a Reel of 2500)
units
1.18 - 5V SOT-23 Adjustable 0.2% Surface Mount Series - 5.5 V 1.181 V 1.186 V 5 0.013 %/V 0.1 (Sourcing) %/mA, 0.12 (Sink) %/mA 3 x 1.75 x 1.3mm
RS Stock No. 190-4453
Mfr. Part No.MAX6175BASA+
SGD5.292
Each (In a Tube of 100)
units
5V SO Precision 0.1% Surface Mount - - 40 V 4.99 V 5.005 V 8 10 ppm/V 15 (Sourcing) ppm/mA, 900 (Sink) ppm/mA 5 x 4 x 1.5mm
RS Stock No. 190-6490
Mfr. Part No.MAX6023EBT25+T
SGD5.004
Each (In a Pack of 5)
units
2.5V UCSP Precision ±0.2% Surface Mount Series/Shunt - 12.6 V 2.49 V 2.505 V 5 140 μV/V 1.4 μV/μA 1.46 x 0.97 x 0.4mm
RS Stock No. 732-9749
Mfr. Part No.MAX6192AESA+
SGD7.52
Each
units
2.5V SOIC Fixed ±0.08 % Surface Mount Series 500µA 12.6 V 2.5 V 2.5 V 8 140 μV/V 0.8 μV/μA 5 x 4 x 1.5mm
RS Stock No. 192-2242
Mfr. Part No.MAX6225ACPA+
SGD13.877
Each (In a Tube of 50)
units
2.5V PDIP Fixed ±0.02 % Through Hole Series 15mA 40 V 2.499 V 2.501 V 8 18 ppm/V 1 ppm/mA 9.91 x 7.87 x 4.45mm
RS Stock No. 190-6460
Mfr. Part No.LM4040CEX3-3.3+T
SGD1.311
Each (In a Pack of 25)
units
3.3V SC-70 Precision 0.5% Surface Mount Shunt - - - - 3 - - 2.2 x 1.35 x 1mm
RS Stock No. 190-7818
Mfr. Part No.MAX6177AASA+
SGD10.50
Each (In a Pack of 2)
units
3.3V SO Precision 0.06% Surface Mount - - 40 V 3.298 V 3.302 V 8 10 ppm/V 15 (Sourcing) ppm/mA, 900 (Sink) ppm/mA 5 x 4 x 1.5mm
RS Stock No. 189-7885
Mfr. Part No.MAX8213ACSE+
SGD9.125
Each (In a Tube of 50)
units
- SOIC - - Surface Mount - - - - - 16 - - 10.01 x 6.2 x 1.55mm
RS Stock No. 190-7761
Mfr. Part No.MAX6143AASA25+
SGD12.25
Each (In a Pack of 2)
units
2.5V SO Precision 0.06% Surface Mount - - 40 V 2.49 V 2.501 V 8 10 ppm/V 15 (Sourcing) ppm/mA, 900 (Sink) ppm/mA 5 x 4 x 1.5mm
RS Stock No. 190-7798
Mfr. Part No.MAX6126B25+
SGD7.995
Each (In a Pack of 2)
units
2.5V μMax Precision ±0.1% Surface Mount Series/Shunt - 12.6 V - - 8 40 μV/V 25 (Sourcing & Sink) μV/mA 3.1 x 3.1 x 0.95mm
RS Stock No. 190-4459
Mfr. Part No.MAX6241BCSA+
SGD5.809
Each (In a Tube of 100)
units
4.096V SO Precision ±0.02% Surface Mount - - 36 V 4.092 V 4.1 V 8 45 ppm/V 9 (Sourcing) ppm/mA, 18 (Sink) ppm/mA 5 x 4 x 1.5mm
RS Stock No. 189-6883
Mfr. Part No.MAX6250BESA+
SGD6.97
Each (In a Tube of 100)
units
5V SOIC Fixed ±0.02 % Surface Mount Series 15mA 36 V 5 V 5.01 V 8 35 ppm/V 7 ppm/mA 5 x 4 x 1.5mm
RS Stock No. 189-6864
Mfr. Part No.MAX6126A21+
SGD8.241
Each (In a Tube of 50)
units
2.048V μMAX Fixed ±0.02 % Surface Mount Series 10mA 12.6 V - - 8 40 μV/V 25 μV/mA 3.1 x 3.1 x 0.95mm
RS Stock No. 190-4426
Mfr. Part No.MAX6023EBT25+T
SGD2.951
Each (On a Reel of 2500)
units
2.5V UCSP Precision ±0.2% Surface Mount Series/Shunt - 12.6 V 2.49 V 2.505 V 5 140 μV/V 1.4 μV/μA 1.46 x 0.97 x 0.4mm