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 428-436
製造零件編號TL431ACLP
HK$5.36
單位
2.5 - 36V TO-92 Adjustable ±1.0 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 4.83 x 3.43 x 3.68mm
RS庫存編號 145-1010
製造零件編號TL431ACLP
HK$1.522
個 (以毎袋:1000)
單位
2.5 - 36V TO-92 Adjustable ±1.0 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 4.83 x 3.43 x 3.68mm
RS庫存編號 101-8304
製造零件編號LM385Z-1.2G
Brandonsemi
HK$2.856
個 (以毎袋:2000)
單位
1.235V TO-92 Fixed ±2.0 % Through Hole Shunt 20mA - 1.205 V 1.26 V 3 - 20 mV 5.2 x 4.19 x 5.33mm
RS庫存編號 463-482
製造零件編號LM385Z-1.2G
Brandonsemi
HK$6.397
/個 (每包:10個)
單位
1.235V TO-92 Fixed ±2.0 % Through Hole Shunt 20mA - 1.205 V 1.26 V 3 - 20 mV 5.2 x 4.19 x 5.33mm
RS庫存編號 163-1004
製造零件編號NCP431ACSNT1G
Brandonsemi
HK$1.07
個 (在毎卷:3000)
單位
2.5 - 36V SOT-23 Programmable ±1.0 % Surface Mount Shunt 100mA - 2.475 V 36 V 3 - - 3.04 x 1.4 x 1.01mm
RS庫存編號 776-0759
製造零件編號NCP431ACSNT1G
Brandonsemi
HK$4.649
/個 (每包:10個)
單位
2.5 - 36V SOT-23 Programmable ±1.0 % Surface Mount Shunt 100mA - 2.475 V 36 V 3 - - 3.04 x 1.4 x 1.01mm
RS庫存編號 661-9827
製造零件編號TL431CLPR
HK$4.024
/個 (每包:10個)
單位
2.5 - 36V TO-92 Adjustable ±2.0 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 4.83 x 3.43 x 3.68mm
RS庫存編號 169-5617
製造零件編號TL431CLPR
HK$0.899
個 (在毎卷:2000)
單位
2.5 - 36V TO-92 Adjustable ±2.0 % Through Hole Shunt 100mA 37 V 2.5 V 36 V 3 - - 4.83 x 3.43 x 3.68mm
RS庫存編號 145-3275
製造零件編號TL431CLPG
Brandonsemi
HK$1.082
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 714-1114
製造零件編號TL431CDT
HK$3.599
/個 (每包:20個)
單位
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庫存編號 179-1626
製造零件編號TL431CD
HK$3.238
毎管:75 個
單位
2.5 - 36V SOIC Adjustable ±2.0 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 8 - - 4.9 x 3.91 x 1.58mm
RS庫存編號 535-9616
製造零件編號LM4040CIM3-4.1/NOPB
HK$8.484
/個 (每包:5個)
單位
4.1V SOT-23 Fixed ±0.5 % Surface Mount Shunt 15mA - - - 3 - 7 mV 2.92 x 1.3 x 0.93mm
RS庫存編號 168-6826
製造零件編號TL431CDT
HK$1.369
個 (在毎卷:2500)
單位
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庫存編號 463-246
製造零件編號TL431CLPG
Brandonsemi
HK$3.109
/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 857-979
製造零件編號TL431CD
HK$4.73
單位
2.5 - 36V SOIC Adjustable ±2.0 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 8 - - 4.9 x 3.91 x 1.58mm
RS庫存編號 121-8299
製造零件編號REF5045AID
HK$26.172
毎管:75 個
單位
4.5V SOIC Fixed ±0.05 % Surface Mount Series 10mA 18 V - - 8 1 ppm/V 50 ppm/mA 5 x 4 x 1.5mm
RS庫存編號 121-8713
製造零件編號LM4040DIM3-2.5/NOPB
HK$2.867
個 (在毎卷:1000)
單位
2.5V SOT-23 Fixed ±1.0 % Surface Mount Shunt 15mA - - - 3 - 8 mV 2.92 x 1.3 x 0.93mm
RS庫存編號 162-5937
製造零件編號TLVH431BQDBZT
HK$10.396
個 (在毎卷:250)
單位
1.24 - 18V SOT-23 Adjustable ±0.5 % Surface Mount Shunt 70mA 20 V 1.24 V 18 V 3 - - 2.92 x 1.3 x 1mm
RS庫存編號 698-9069
製造零件編號MCP1525T-I/TT
BrandMicrochip
HK$8.78
單位
2.5V SOT-23 Fixed ±1.0 % Surface Mount Series 20mA 7 V 2.475 V 2.525 V 3 350 μV/V 1.3 mV/mA 2.9 x 1.3 x 0.95mm
RS庫存編號 711-2475
製造零件編號TL431AIDR
HK$5.05
/個 (每包:5個)
單位
2.5 - 36V SOIC Adjustable ±1.0 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 8 - - 4.9 x 3.91 x 1.58mm