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庫存編號 739-0300
製造零件編號KA431AZTA
TWD9.30
/個 (每包:10個)
單位
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庫存編號 166-2430
製造零件編號KA431AZTA
TWD2.40
Each (On a Tape of 2000)
單位
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庫存編號 166-3619
製造零件編號KA431AZBU
TWD1.90
個 (以毎袋:10000)
單位
2.5 - 36V TO-92 Programmable ±1.0 % Through Hole Shunt - - - 36 V 3 - - 5.2 x 4.19 x 5.33mm
RS庫存編號 807-8786
製造零件編號KA431AZBU
TWD8.50
/個 (每包:50個)
單位
2.5 - 36V TO-92 Programmable ±1.0 % Through Hole Shunt - - - 36 V 3 - - 5.2 x 4.19 x 5.33mm
RS庫存編號 145-3275
製造零件編號TL431CLPG
TWD3.40
個 (以毎袋:2000)
單位
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庫存編號 463-246
製造零件編號TL431CLPG
TWD10.00
/個 (每包:50個)
單位
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庫存編號 807-8789
製造零件編號KA431LZTA
TWD9.30
/個 (每包:50個)
單位
2.5 - 36V TO-92 Programmable ±0.5 % Through Hole Shunt - - - 36 V 3 - - 5.2 x 4.19 x 5.33mm
RS庫存編號 688-9335
製造零件編號TL431CDR2G
TWD17.50
/個 (每包:2個)
單位
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庫存編號 145-3880
製造零件編號TL431CDR2G
TWD3.50
個 (在毎卷:2500)
單位
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庫存編號 463-498
製造零件編號LM385Z-2.5G
TWD18.90
/個 (每包:10個)
單位
2.5V TO-92 Fixed ±3 % Through Hole Shunt 20mA - 2.425 V 2.575 V 3 - 20 mV 5.2 x 4.19 x 5.33mm
RS庫存編號 122-0101
製造零件編號TL431BCDR2G
TWD5.40
個 (在毎卷:2500)
單位
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庫存編號 163-2419
製造零件編號LM385Z-2.5G
TWD7.70
個 (以毎袋:2000)
單位
2.5V TO-92 Fixed ±3 % Through Hole Shunt 20mA - 2.425 V 2.575 V 3 - 20 mV 5.2 x 4.19 x 5.33mm
RS庫存編號 688-9323
製造零件編號TL431BCDR2G
TWD17.00
/個 (每包:2個)
單位
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庫存編號 166-3530
製造零件編號KA431LZTA
TWD2.40
Each (On a Tape of 2000)
單位
2.5 - 36V TO-92 Programmable ±0.5 % Through Hole Shunt - - - 36 V 3 - - 5.2 x 4.19 x 5.33mm
RS庫存編號 463-492
製造零件編號LM285Z-2.5G
TWD19.50
/個 (每包:10個)
單位
2.5V TO-92 Fixed ±1.5 % Through Hole Shunt 20mA - 2.462 V 2.538 V 3 - 10 mV 5.2 x 4.19 x 5.33mm
RS庫存編號 806-4043
製造零件編號LM431SCCM32X
TWD4.90
Each (On a Tape of 100)
單位
2.5 - 36V SOT-23 Adjustable ±0.5 % Surface Mount Shunt 100mA - 2.5 (Cathode) V 36 V 3 - - 2.92 x 1.3 x 0.93mm
RS庫存編號 862-4976
製造零件編號TL431ACLPG
TWD14.60
/個 (每包:50個)
單位
2.5 - 36V TO-92 Programmable ±1.0 % Through Hole Shunt 100mA - - 36 V 3 53 mV 25 mV 5.2 x 4.19 x 5.33mm
RS庫存編號 774-3697
製造零件編號TL431AILPG
TWD13.90
/個 (每包:10個)
單位
2.5 - 36V TO-92 Programmable ±4 % Through Hole Shunt 100mA 37 V 2.495 V 36 V 3 53 mV 25 mV 5.2 x 4.19 x 5.33mm
RS庫存編號 864-7878
製造零件編號TL431ACDR2G
TWD12.30
/個 (每包:50個)
單位
2.5 - 36V SOIC Programmable ±1.0 % Surface Mount Shunt 100mA - 2.44 V 36 V 8 53 mV 25 mV 5 x 4 x 1.5mm
RS庫存編號 781-4165
製造零件編號LM4040DTB-250GT3
TWD33.50
/個 (每包:10個)
單位
2.5V SOT-23 Fixed ±1.0 % Surface Mount Shunt 15mA - - 2.5 V 3 - - 3.04 x 1.04 x 1.12mm