MAX6225AEPA

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The MAX6225AEPA is a voltage reference which belong to PMIC family. It is a high performance voltage reference, with the ability to provide highly accurate voltage over a wide range of temperature fluctuations and supply voltages; its low power consumption and small form factor are both suitable for mobile or portable device applications such as PDAs, cell phones and wearables. In this article, we will discuss the application field and working principle of MAX6225AEPA.

Application field of MAX6225AEPA

The MAX6225AEPA voltage reference can be used in a wide range of applications, such as battery-powered systems, consumer electronics, computing, communication systems, laboratory equipment, automotive, automotive aftermarket systems, temperature monitoring systems, motor drives, and factory automation. As mentioned above, its small form factor and low power consumption also make it ideal for mobile or portable applications.

The MAX6225AEPA is particularly suitable for applications where accuracy is crucial, such as medical instruments, industrial process control equipment, ADCs and DACs, precision measurement systems, and even military applications. It is also a good choice for design projects that need to operate in extreme temperature environments, and for applications that need to source or sense current.

Working Principle of MAX6225AEPA

The MAX6225AEPA voltage reference has a two-terminal circuit design and operates on a DC power supply. It consists of an integrated circuit with a highly accurate voltage reference and associated components. The reference circuit is designed such that a known and stable voltage is produced at its output, regardless of changes in temperature or supply voltage. The reference output can remain stable even over a wide range of temperatures, typically 40 to +105°C. The reference voltage of the device is factory programmed and can be set to a value between 1.2 and 5.0 V, with a typical accuracy of ±0.06%.

The MAX6225AEPA design uses a standard differential amplifier topology consisting of an amplifying transistor, a compensation capacitor and a measurement resistor. The amplifying transistor amplifies the reference voltage and sends it to the other side of the measuring resistor. A comparison is made between the amplified reference voltage and a fraction of the amplified voltage, which is determined by the ratio between the measuring resistor and the compensation capacitor. If there is a discrepancy between the two signalled, the compensation capacitor inhibits the flow of current until the difference is nullified. This incorporation of an active feedback makes the MAX6225AEPA highly stable even in the presence of temperature changes and supply-related variations.

The MAX6225AEPA voltage reference is designed with a low input noise current, making it suitable for medium to high power applications in a wide variety of digital and analog circuits, as well as industrial, automotive, and consumer applications. It is packaged in a small footprint, 3-lead SOT-23-5 package, making it easy to integrate into any design. In addition, its wide operating temperature range and enhanced protection feature ensure reliable performance in extreme-temperature applications.

Conclusion

The MAX6225AEPA voltage reference is a high performance device designed to provide highly accurate reference voltages over a wide temperature range and supply voltages. It is suitable for many types of applications in both the analog and digital domains, such as industrial motor drives and automotive systems, as well as battery-operated and portable applications. Its small form factor and low power consumption are ideal for shrinking design size and reducing overall system power consumption.

The MAX6225AEPA is designed with a two-terminal circuit and a standard differential amplifier topology comprising an amplifying transistor, a measurement resistor and a compensation capacitor. Its well-designed feedback system allows for high stability for applications where accuracy is paramount, making it suitable for use in stringent temperature environments. The device is available in a 3-lead SOT-23-5 package, making integration easy and convenient.

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