REF3125AIDBZT

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Power management integrated circuits, or PMICs, are used to increase system-level efficiency and save power. PMICs are typically composed of a number of power management components, such as an AD converter, an amplifier, and references. The REF3125AIDBZT is a voltage reference PMIC featuring a low noise output, low quiescent current and a wide supply range. This IC can be used in a variety of applications, including instrumentation, medical instrumentation, and audio/video applications.

The REF3125AIDBZT operates with a wide power supply range of 2.7V to 5.5V, and features a low output noise of 0.3μVrms and a quiescent current of 0.8μA. It is also specified with an input voltage range of 0V to Vcc and an output voltage accuracy range of 0.5% over the ambient temperature range of -40°C to +125°C.

The REF3125AIDBZT operates on a bandgap voltage reference topology. This type of reference uses a bandgap voltage reference circuit, which provides a stable voltage reference that is independent of the supply voltage. The bandgap voltage reference circuit consists of a resistor-divider network and two transistors connected in a zener diode configuration. The transistors are connected in a differential amplifier configuration, which helps to reduce the offset voltage of the circuit.

In the REF3125AIDBZT, the bandgap voltage reference is further enhanced with a voltage amplifier circuit. The voltage amplifier circuit uses a current-sense amplifier and an op amp to increase the accuracy of the output voltage. The current-sense amplifier acts as a buffer, allowing the output voltage to be adjusted by changing the value of a resistor in the current-sense amplifier circuit. The op amp provides a stable gain, ensuring a high degree of accuracy in the output voltage.

The REF3125AIDBZT is a versatile device that can be used in a variety of applications requiring an accurate and stable voltage reference. It provides a low noise output and low quescient current, and is specified to operate over the specified supply voltage range, temperature range, and accuracy range. As such, it is well-suited for applications such as instrumentation, medical instrumentation, and audio/video applications.

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