AD8436ACPZ-RL

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PMIC - RMS to DC Converters

AD8436ACPZ-RL Application Field and Working Principle

The AD8436ACPZ-RL is a fully integrated, dual-channel, low-power RMS-to-DC converter. It has been designed specifically to address wide-bandwidth, high-sensitivity, low-power RMS-to-DC applications.

This IC supports wide input bandwidths that simultaneously cover down to audio frequencies (2 Hz) and up to high frequencies (1.5 MHz). Moreover, it has an integrated low-noise post-filter and a high-accuracy A/D conversion capability, allowing measurements with a resolution of 8-12 bits.

The AD8436ACPZ-RL also has a low-power sleep and sleep wake-up modes, together with an I2C interface. This makes it ideal for portable and wireless applications, where low power consumption is paramount. The part is also available in a RoHS-compatible and Pb-free package.

AD8436ACPZ-RL Working Principle

As an RMS-to-DC converter, the AD8436ACPZ-RL performs the conversion from an analog input signal to a digital output value. This is done by converting the root mean square (RMS) value of the input signal, which is a measure of the power of the signal, into a digital value that can be further processed.

The part has two channels, each with a separate, highly accurate A/D conversion stage, that processes a wide range of input frequencies. This stage is followed by a low-pass filter, which eliminates unwanted high-frequency components of the signal, resulting in a clean, low-noise output.

Once the signal has been converted to the digital domain, a robust digital signal processing (DSP) engine is used to calculate the RMS value from the digital input value. This value is stored in an internal register and can be read over the I2C bus.

Overall, the AD8436ACPZ-RL is an integrated, highly accurate, and low-power RMS-to-DC converter suitable for a wide range of applications, such as in medical systems, portable devices, wearables, and consumer electronics.

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