AD8221BRZ-R7

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The AD8221BRZ-R7 is a low power, low noise, tightly matched, precision CMOS dual-channel instrumentation amplifier. It is in the Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps category. The AD8221BRZ-R7 is ideal for low voltage sensor applications such as strain gauges and thermocouples, as well as low power audio and data acquisition systems.

The AD8221BRZ-R7 features a wide input common-mode voltage range of 0V to 6.5V and a low offset voltage of 2mV maximum. Its low input bias current of 1pA (maximum) makes it ideal for low-noise, low power applications. The AD8221BRZ-R7 has a unity gain bandwidth of 6.2 MHz, a slew rate of 8 V/µs, and a low output noise voltage of 15 nV/√Hz. It has a true different output and is designed to optimize the precision and dynamic range of low-noise, low-power sensor applications.

The AD8221BRZ-R7 operates from a single +2.7 V to +5.5 V supply, and its integrated power-on reset circuit ensures stability in power supply and noise immunity. The low power design ensures stable, reliable operation in low-supply-voltage applications. It is specified over the extended industrial temperature range of -40°C to +125°C.

The AD8221BRZ-R7 is constructed on an advanced process which combines silicon-on-insulator (SOI) technology and a proprietary level-shift process. This innovative combination results in a device with excellent gain linearity and low noise performance over a wide temperature range. The AD8221BRZ-R7 also incorporates advanced design techniques such as lead-free surface mount packaging, precision amplifiers, and a low-power output stage.

The working principle of the AD8221BRZ-R7 instrumentation amplifier is based on an \'idealized\' non-inverting amplifier. The input signal is applied to the non-inverting input terminal. The inverting input terminal is connected to a \'virtual ground\' point. This point, and the non-inverting input terminal, are driven by the output of the difference amplifier, which has a gain of two and is fed by the two differential inputs. The differential signal is amplified by two, and the output is equal to the signal at the non-inverting input terminal, increased by a factor of two.

The output from the instrumentation amplifier is highly accurate and provides excellent power supply rejection and input bias current immunity. There is also a low-noise mode, which allows the instrumentation amplifier to perform effectively in low-noise applications. This makes the AD8221BRZ-R7 ideal for use in audio, data acquisition and industrial applications where low noise and low power performance are required.

The AD8221BRZ-R7 can be used in a variety of applications, such as medical instrumentation, strain gauges, motion sensors, temperature sensing, low noise audio, and vibration sensing. It is also an ideal solution for data acquisition systems, which require good accuracy and low power consumption. The device is highly configurable and can be used in a wide range of applications, making it a cost-effective solution for demanding applications.

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