ZXRE125ER

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The ZXRE125ER is a PMIC (Power Management Integrated Circuit) within the Voltage Reference family. This IC provides a fixed voltage reference with a tolerance of ±0.1%, enabling component designers to leverage the reference voltage when designing their respective circuits. The device is rated to a maximum current of 25mA, supporting up to a single-pole, 400mA application. Furthermore, it operates in temperatures as low as –40 °C and as high as +125 °C, making it suitable for use in extreme conditions.

The ZXRE125ER is tailored for designers looking for improved accuracy and temperature stability in their circuits. The device does not require external components and has low voltage noise density (typically ~1μV/√Hz), making it suitable for a variety of applications including portable medical instruments, calculators, and security sensors. With a wide operating temperature range and high stability, this IC is also well-suited for automotive applications.

The working principle of the ZXRE125ER is based on a bandgap reference concept. The internal design consists of a junction of three different bipolar transistors, two of which are matched to each other to form what is known as a differential pair. The current levels in each transistor are dynamically adjusted to provide a constant voltage. The reference voltage is then amplified and buffered through an operational amplifier to control the output voltage.

The ZXRE125ER can be used with a variety of external components in order to achieve the desired application requirements. For instance, a capacitive load can be applied in order to reduce noise, while a resistor can be added to adjust the output voltage. Other external components can be used to reduce ripple, maintain a minimum operating temperature, or protect against over-voltage or over-temperature.

Overall, the ZXRE125ER is a reliable and accurate voltage reference that can withstand even the harshest of environmental conditions, making it a great choice for most circuit design applications. With its low power consumption and fast start-up, it can be used to design circuits requiring tight voltage reference tolerances in the most demanding situations.

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