AD8221BRZ-RL

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AD8221BRZ-RL is an ultra-low distortion, unity-gain stable, rail-to-rail precision instrumentation amplifier. It finds applications in fields where wide input common-mode range and small offset voltage is a must. It is a monolithic integrated circuit that is designed for low power, low noise, versatile and accurate amplification of very small signals in the presence of very large common mode signals. This IC is suitable for applications such as medical instruments, automotive applications, and test and measurement instrumentation.

The AD8221BRZ-RL has an input common-mode range that extends from 0.18V of the negative power supply to within 300mV of the positive power supply. This allows the amplifier to remain operational when an input offset voltage is present. Its extraordinarily low distortion specifications make the IC suitable for applications where low distortion and CMRR are important. The AD8221BRZ-RL also has built-in overvoltage protection circuitry that minimizes the effects of overvoltage transients on input and output signals.

The AD8221BRZ-RL operates on a single power supply over the range of 1.8V to 5.5V and features rail-to-rail output swing. Its wide input common-mode range and low supply voltage make the IC suitable for use in battery-powered applications. The IC is also designed for low input, low offset voltage and low power consumption; the total power dissipation is 170μA maximum. The IC also features a low power shutdown mode that reduces the quiescent current to less than 0.1μA.

The working principle of the AD8221BRZ-RL is that it amplifies the difference between two electrons applied to its inverting and non-inverting Input terminals. The current fed back to the outputs is basically equal and opposite to the difference of the input signals. The gain of the amplifier is set by the ratio of the external resistors between the inverting input node and ground and between the non-inverting input node and ground. This way it provides an accurate and low-noise amplification for signals in the range of microvolts and provides a wide-band response with a maximum output voltage swing that is equal to the supply voltage.

The AD8221BRZ-RL is a precision instrumentation amplifier that provides a wide input common-mode range, low noise, low offset, and low distortion for accurate signal conversion and amplification. It is suitable for applications where low offset and low noise is required, such as medical instruments and test and measurement instrumentation. The amplifier’s low power consumption and rail-to-rail output swing make it ideal for battery-powered applications, while its full-power shutdown feature allows very low power dissipation in the shutdown mode. It is capable of providing accurate and low-noise amplification of signals in the range of microvolts, with a maximum output voltage swing that is equal to the supply voltage.

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