AD8436ARQZ-RL

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The PMIC - RMS to DC converters are broadly employed in the industrial, commercial and residential automation sector for converting a varying root mean square (RMS) voltage into a constant direct current (DC) output. One of the most widely used and reliable RMS to DC converters is AD8436ARQZ-RL. This application note details the field of its application and working principle.

The AD8436ARQZ-RL is a high voltage, low-power application-specific integrated circuit (ASIC) used in switching power supplies, DC-DC converters and low-voltage off-line applications. It features a low RMS current rating and is suitable for VDSL, ADSL, G.fast and other related applications. It supports a wide operating temperature range of -30 to +70 °C and is offered in a RoHS compliant, MSOP-8 package. This device offers a low thermal resistance of 65°C/W, making it suitable for power dissipation in applications with limited board area.

The AD8436ARQZ-RL can measure the RMS current values accurately over a wide range of input current levels, making it an ideal choice for applications such as remote powering, data communications and other uses such as power device sensing. The device features internal thermal protection, which helps in limiting temperature rise and in prolonging the life of the RMS to DC converter. Further, it offers an over temperature protection which ensures that the converter operates safely.

The AD8436ARQZ-RL can operate in either current-mode or voltage-mode of operation based on the user requirement. In the voltage-mode of operation, it provides a voltage output proportional to the square root of the input current for a fixed dynamic range. The voltage-mode output is derived from the integrated op-amp, which can be set to output a current, voltage or a combination of the two. In the current-mode of operation, the device provides current output proportional to the square root of the input current. This mode ensures higher accuracy since the output is derived directly from the input current.

The AD8436ARQZ-RL features an adjustable response time, which helps in optimizing the performance of the converter. The device offers a high accuracy in current measurement over a wide dynamic range, which makes it ideal for applications requiring precise current measurement. The device also provides fast start-up and fast settling time, ensuring better system performance and power efficiency. Further, the converter features low jitter and low output ripple, which eliminate any unwanted noise or interference.

The AD8436ARQZ-RL features a wide operating voltage range of 4.5V to 14V and can provide a fixed DC output of up to 100mA, making it suitable for a variety of applications such as remote powering and line voltages. The converter is designed to exhibit good efficiency and power dissipation characteristics, enabling it to work in a wide range of ambient temperatures from -30°C to +70°C. The device is available in two different packages: an MSOP-8 and a 10-pin wide body MSOP-10.

In summary, the AD8436ARQZ-RL is a high-performance RMS to DC converter with low-power consumption and a wide operating voltage range making it suitable for a wide variety of applications in various industrial, commercial and residential automation sectors. It features excellent current accuracy and a wide dynamic range, making it ideal for applications such as remote powering and data communication. It also features adjustable response time and fast start-up, enabling efficient operation over a wide range of temperatures. The device is offered in two different packages, which makes it suitable for operation in a wide range of environments.

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