VRE306AS

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Voltage references are a type of electrical components which provide an output voltage value, which is fairly stable and independent of the characteristics of the load connected to it. The VRE306AS is a micropower voltage reference typically used in precision low power applications such as portable and wearable electronics. The device uses a micropower temperature compensated bandgap reference circuit with a wide range of output voltage options and a low quiescent current of 500 nA. It is suitable for many regulated voltage applications where low quiescent current, low power dissipation and a wide temperature range are required.

The applications for the VRE306AS include but are not limited to; microcontroller systems, embedded systems, digital-analog convertors, audio and digital signal processors, and instrumentation. Its low quiescent current and temperature stability make it ideal for a range of portable, battery-operated applications.

The working principle of the VRE306AS is based on the bandgap voltage reference. A bandgap voltage reference generates an output voltage that is much less sensitive to temperature changes than normal zener references when a fixed current is drawn from its output. It consists of a number of components that work together to produce the reference voltage. The main components are two transistors, two resistors and two pairs of diodes. The two transistors are connected together in such a way that the difference in their base-emitter voltages is constant and, as a result, the difference in their collector currents is constant.

The two base-emitter voltage differences together contribute to an output voltage of a known magnitude that is, in turn, stabilized by the constant current amplifier formed by the two resistors and the two pairs of diodes. This constant current amplifier ensures that the output voltage is not affected by fluctuations in the current drawn from the output. This ensures that the voltage reference remains stable over a wide range of temperatures.

The VRE306AS uses this working principle to provide a stable and precise reference voltage. It has an output voltage range from 0.7 V to 5.5 V, with a maximum output current of 500 μA. It also features 0.1 % and 0.2 % total output accuracy over a full temperature range. It also has a low quiescent current of 500 nA and a wide temperature Compensate-Over (TCO) range of -40°C to +125°C.

The VRE306AS is an excellent voltage reference for a wide range of applications. Its low quiescent current and wide range of output voltage options make it an ideal choice for portable and wearable electronics. Its precision and temperature stability make it suitable for microcontroller and embedded systems, digital-analog convertors, audio and digital signal processors, and instrumentation.

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