Voltage References

Voltage references are electronic devices that provide a fixed voltage. They provide a constant voltage regardless of external factors like the load on the device or fluctuations in the power supply.


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. 


Types of voltage references

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%. 


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 analog-to-digital converters. They are also used in scientific applications and in medical equipment where voltage variations need to be tested regularly. 


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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 533-8489
製造零件編號LM4040DIM3-2.5/NOPB
HK$5.336
/個 (每包:5個)
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 121-9495
製造零件編號TL431ASA-7
HK$0.77
個 (在毎卷:3000)
單位
2.5 - 36V SOT-23 Adjustable ±1.0 % Surface Mount Shunt 100mA 40 V 2.5 V 36 V 3 - - 3 x 1.4 x 1mm
RS庫存編號 802-3903
製造零件編號ADR4540ARZ
HK$52.88
單位
4.096V SOIC Fixed ±0.04 % Surface Mount Series 10mA 15 V - - 8 10 ppm/V 120 ppm/mA 5 x 4 x 1.5mm
RS庫存編號 661-9297
製造零件編號LM385DRG4-2-5
HK$4.598
/個 (每包:5個)
單位
2.5V SOIC Fixed ±3 % Surface Mount Shunt 20mA - 2.425 V 2.575 V 8 - 20 mV 4.9 x 3.91 x 1.58mm
RS庫存編號 463-498
製造零件編號LM385Z-2.5G
HK$4.486
/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 165-8339
製造零件編號AP4310AMTR-G1
HK$1.706
個 (在毎卷:4000)
單位
2.5V SOIC Fixed ±0.4 % Surface Mount Shunt 80mA 36 V - - 8 - - 5.1 x 4 x 1.45mm
RS庫存編號 761-5141
製造零件編號LM4128BMF-2.5/NOPB
HK$18.65
/個 (每包:5個)
單位
2.5V SOT-23 Fixed ±0.2 % Surface Mount Series 20mA 12 V - 2.5 V 5 50 ppm/V 120 ppm/mA 2.92 x 1.6 x 1.02mm
RS庫存編號 809-5374
製造零件編號TL431AILP
HK$3.616
/個 (每包:5個)
單位
2.5 - 36V TO-92 Adjustable ±1.0 % Through Hole Shunt 100mA - - 36 V 3 - - 5.21 x 4.19 x 5.34mm
RS庫存編號 709-1545
製造零件編號AD1582BRTZ-REEL7
HK$20.982
/個 (每包:5個)
單位
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庫存編號 162-9967
製造零件編號LM385BZ-1.2G
HK$2.499
個 (以毎袋:2000)
單位
1.235V TO-92 Fixed ±1.0 % Through Hole Shunt - - - - 3 - - 5.2 x 4.19 x 5.33mm
RS庫存編號 169-8210
製造零件編號NJM431M
HK$3.41
毎管:100 個
單位
2.5 - 36V DMP Adjustable ±2.2 % Surface Mount Shunt 100mA 37 V 2.5 V 36 V 8 - 0.1 % 5 x 5 x 1.6mm
RS庫存編號 517-2172
製造零件編號TL1431CD
HK$4.316
/個 (每包:5個)
單位
2.5 - 36V SOIC Adjustable ±0.4 % 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 708-9491
製造零件編號AD581SH
HK$281.86
單位
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庫存編號 145-1262
製造零件編號LM385LPE3-1-2
HK$2.503
個 (以毎袋:1000)
單位
1.235V TO-92 Fixed ±2.0 % Through Hole Shunt 20mA - 1.21 V 1.26 V 3 - 20 mV 4.83 x 3.43 x 3.68mm
RS庫存編號 751-5221
製造零件編號ZTL431AH6TA
HK$3.224
Each (On a Tape of 25)
單位
2.5V SC-70 Adjustable ±1.0 % Surface Mount Shunt 100mA 20 V 2.475 V 20 V 6 - - 2 x 1.35 x 1mm
RS庫存編號 158-1979
製造零件編號AD1582BRTZ-REEL7
HK$13.129
個 (在毎卷:3000)
單位
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庫存編號 732-1345
製造零件編號LM385BLPR-1-2
HK$6.612
/個 (每包:5個)
單位
1.235V TO-92 Fixed ±1.0 % Through Hole Shunt 20mA - 1.22 V 1.25 V 3 - 20 mV 5.21 x 4.19 x 5.34mm
RS庫存編號 764-8753
製造零件編號ADR3425ARJZ-R2
HK$36.23
單位
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庫存編號 168-4199
製造零件編號ADR02ARZ-REEL7
HK$13.278
個 (在毎卷:1000)
單位
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庫存編號 145-6681
製造零件編號REF5040AID
HK$30.098
毎管:75 個
單位
4.096V SOIC Fixed ±0.05 % Surface Mount Series 10mA 18 V - - 8 1 ppm/V 50 ppm/mA 5 x 4 x 1.5mm