What is a Voltage Reference?
A voltage reference is an electronic device which produces a constant voltage regardless of the loading on the device, temperature changes, passage of time and power supply variations. The voltage reference circuit most commonly used in integrated circuits is the bandgap voltage reference. A bandgap voltage reference uses analog circuits in order to add a multiple of the voltage difference between two bipolar junctions biased at different current densities to the voltage developed across a diode. The diode voltage has a negative temperature coefficient and the junction voltage difference has a positive temperature coefficient. When added in the proportion which is required in order to make these coefficients cancel each other, the resultant constant value is a voltage which is equal to the bandgap voltage of the semiconductor.
Types of Voltage References
There are several different kinds of voltage references. At Future Electronics we stock many of the most common types categorized by type, tolerance, rated voltage, reference voltage, forward (drive) current, rated current, quiescent current and packaging type. The parametric filters on our website can help refine your search results depending on the required specifications.
The most common sizes for tolerance are ± 2%, ± 1% and ± 0.5%. We also carry voltage references with tolerances up to ± 40 %. Reference voltage can be up to 36 V, with the most common sizes being 1.225 V, 2.495 V, 2.5 V and 5 V.
Voltage References from Future Electronics
Future Electronics has a complete selection of programmable voltage references from several chip manufacturers that can be used as an adjustable voltage reference, DC voltage regulator, voltage regulator IC (integrated circuit) high voltage regulator, AC voltage regulator, bandgap voltage reference or for any circuits that may require a voltage reference. Simply choose from the voltage reference technical attributes below and your search results will quickly be narrowed in order to match your specific voltage reference application needs.
If you have a preferred brand, we deal with several manufacturers such as Analog Devices, Micrel Semiconductor, Microchip, ON Semiconductor, Zetex and STMicroelectronics, among others. You can easily refine your voltage reference product search results by clicking your preferred voltage reference brand below from our list of manufacturers.
Applications for Voltage References:
Voltage references are found in analog to digital converters, digital to analog converters, power supply voltage regulators and several other measurement and control systems and power supplies of precision electronic equipment. They are particularly found in systems where performance is greatly affected by small changes in the voltage applied. Voltage references greatly vary in performance. Laboratory and medical voltage standards have precisions and stability measured in fractions of one percent, whereas computer power supply regulators may hold to within a few per cent of the nominal value.
Choosing the Right Voltage Reference:
When you are looking for the right voltage references, you can filter the results by various attributes with the FutureElectronics.com parametric search: by Reference Voltage (-5 V, 1.225 V, 2.495 V, 2.5 V, 5 V, …), Quiescent Current (up to 10 kA) and Forward Current (from 9.5 uA to 10 A) to name a few. You will be able to find the right DC voltage regulator, AC voltage regulator, adjustable voltage reference, voltage regulator IC (integrated circuit), bandgap voltage reference, high voltage regulator or for any circuits that may require a voltage reference.
Voltage References in Production Ready Packaging or R&D Quantities
If the quantity of voltage references required is less than a full reel, we offer to customers many of our voltage reference products in tube, tray or individual quantities that will help you avoid unneeded surplus.
In addition, Future Electronics offers its clients a unique bonded inventory program designed to eliminate potential problems that could arise from an unpredictable supply of products containing raw metals and products with long or erratic lead times. Talk with your nearest Future Electronics branch and find out more on how you and your company can avoid possible shortages.