MAX6325ESA+T

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In today’s engineering world, there is a great need for precision and accuracy, especially when dealing with low-voltage power systems. In order to ensure that electronics and other high-power applications are running properly, voltage references are needed to provide a reference voltage for which other components can be compared. Max6325ESA+T is a voltage reference device created by Maxim Integrated to meet this specificity requirement. This application note will provide an overview of the application fields and the working principle of the Max6325ESA+T.

The Max6325ESA+T is a precision, low-voltage reference capable of providing extremely accurate and low-noise voltage rails with output voltages between 0.25V and 1.8V. It is optimized for use in low-voltage power systems featuring a wide dynamic range, low power consumption (typical 1.25 µA supply current), and a well-defined output buffers for higher accuracy and accuracy in analog and digital circuits. The Max6325ESA+T includes an additional enable pin (EN) to enable or disable the output when needed, allowing it to integrate into more complex power systems. Furthermore, it contains a high PSRR (Power Supply Rejection Ratio), making it ideal for use in noisy power systems.

The Max6325ESA+T can find application in many places, including consumer devices, medical devices, industrial automation systems, automotive, and IoT segments. Its accuracy is applicable in any application that requires precise voltage references. It is extremely useful when designing circuits that measure low-voltage signals, especially those that are affected by power supply noise and other sources. The Max6325ESA+T can also be used to supply precise voltages to analog and digital circuits, such as opamps, ADCs, DACs, and microcontrollers. It is also used to power up preamps or other audio amplifiers requiring high-accuracy supply rails.

Maxim Integrated’s Max6325ESA+T utilizes a two-stage bandgap voltage reference to generate an extremely precise and accurate output voltage. Its bandgap voltage reference is composed of a temperature-compensated resistor network, which generates a stable output voltage despite the effect of temperature changes. This is possible thanks to its wide temperature operating range (-40° to +125°C) and low temperature coefficient (2ppm/°C). It can achieve 1.25µA of quiescent current draw and features a PSRR of -63dB across the audio and digital frequency ranges. Additionally, it features an integrated EMI filter, which helps to reduce any power supply noise that could interfere with the precision and accuracy of the reference voltage.

The Max6325ESA+T device is designed to provide an extremely accurate and low-noise voltage reference with a wide range of output voltages. It is an ideal choice for applications requiring precision, such as in low-voltage and mixed-signal analogue and digital systems. The Max6325ESA+T provides an additional level of robustness to any power system due to its wide temperature operating range, low quiescent current draw, and excellent PSRR. Furthermore, a built-in EMI filter helps to further improve the accuracy and robustness of the device, making it an ideal choice for a wide range of applications.

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