AD7466BRTZ-REEL

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The AD7466BRTZ-REEL is a precision analog-to-digital converter (ADC) specifically designed for the acquisition of low power, high-impedance sensors. It is a low-power, high-performance low-speed data acquisition system that provides an impressive 16-bit resolution and an impressive sampling rate of up to 16 samples per second. This device makes use of a differential input as shown in the block diagram below which allows it to measure differential signals.

The differential inputs of the ADC employ an internal switch which allows them to switch between a unipolar input and a bipolar input which is useful when measuring a single-ended signals without the need for a separate switch matrix. The ADC also provides a power-on self-test mode which helps verify the accuracy of the ADC before taking a measurement.

Once the differential inputs are configured, the ADC employs a successive approximation register (SAR) technique to provide high accuracy over its entire input range. This technique steps the input voltage at predetermined intervals until the voltage is equal to or greater than the reference voltage. The result is then compared to a digital-to-analog converter (DAC) and the amount of charge is obtained which can then be used to drive the output.

The ADC features a total unadjusted error rate of ±1LSB max, a sample rate of 16 samples per second, an integration time of 500 μs max, and a conversion time of 25 μs max. This device also offers a unique built-in low-pass filter which allows it to accurately measure low frequency from DC to 500 Hz. Some of the other features include an analog input range of 0-5V, an input impedance of 0.02Ω max, a temperature measurement range of -40℃ to +85℃, and a supply current of 4.5mA.

The AD7466BRTZ-REEL is suitable for use in applications such as medical monitoring systems, automotive systems, precision instrumentation, and energy harvesting applications. It is also used in applications where low-noise, low-power, and high-accuracy sensing are needed. Given its impressive performance, accuracy, and low power consumption, it is a valuable addition to any data acquisition application in need of a high-quality ADC.

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