AD587JR-REEL

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PMIC - Voltage Reference has been used as an essential component in power management by electrical engineers since its invention. The AD587JR-REEL is one of the most popular voltage references on the market today, boasting an exceptionally accurate, low-noise, temperature stable output. This article will discuss the application field and working principle of the AD587JR-REEL, providing readers with an in-depth look at its features and potential benefits.

The AD587JR-REEL is a four-terminal adjustable voltage reference typically used to generate a stable output voltage from a floating input. This reference offers a wide adjustable range, along with very low noise and temperature coefficient. It is designed to operate from a 5 V to a 15 V input range, providing a stable output voltage of 0.3 V to 10 V with a typical drift of 0.4 mV/°C, and a temperature coefficient of 0.005%/°C. As such, this reference can provide accurate voltage levels with very low drift even when operating at elevated temperatures.

The AD587JR-REEL is primarily used as an adjustable reference in power supply circuits with wide input voltages, such as notebooks and mobile phones. Its low noise and temperature coefficient ensures that the output voltage remains stable over a wide input voltage range, allowing it to maintain a regulated output voltage even with fluctuating input voltages. Additionally, the reference can be used in telecom, medical and industrial applications where a stable output voltage is required. It has applications in switching power supplies, LED lighting systems, converters, motor control systems and smart device chargers.

The AD587JR-REEL works through an adjustable voltage divider that determines the output voltage. This voltage divider consists of three resistive elements; two external resistors, chosen to match the desired output voltage, and an internal resistor, also known as the “feedback resistor”. When the input voltage is applied to the voltage divider, a portion of the voltage is used to compelete the feedback loop, while the remainder is provided at the output. The internal resistor is responsible for adjusting the feedback loop, thereby regulating the output voltage. Since the input voltage can be adjusted, the output voltage is kept stable, no matter what the external resistor values are.

The AD587JR-REEL also features advanced protection circuits to prevent over-voltage and reverse-polarity protection. It also has an on-chip error amplifier and an output current limiting circuit for added protection in the event of an overload. These features make it an exceptionally versatile voltage reference, suitable for a wide array of demanding and complex applications.

In conclusion, the AD587JR-REEL is an exceptionally versatile and accurate voltage reference, suitable for a variety of demanding power supply applications. Its adjustable voltage divider and advanced protection circuits ensure a stable output voltage and optimized system performance even in high-temperature environments. Additionally, its wide input range and low noise and drift make it a popular choice for power supply and control systems in the telecom, medical and industrial industries.

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