AD8668ARUZ-REEL

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The AD8668ARUZ-REEL is a high-performance, low-power instrumentation amplifier used for a broad range of applications. This device is ideal for precision data acquisition systems, resistive bridge measurements, and signal conditioning of low voltage level signals. It provides high quality signal reception and amplifies it with adjustable gain, low power consumption, and excellent common-mode performance.

The AD8668ARUZ-REEL is a 3-amplifier, fully differential amplifier with a gain range of 1 to 200V/V. It has a single-ended, rail-to-rail output and can be configured to handle a wide variety of signal inputs and gains. The device is designed to operate on 3V supply voltage and offers several features to facilitate its use in various applications, including programmable gain, high common mode range, temperature-compensated offset, and low noise.

The main application fields of the AD8668ARUZ-REEL are in portable applications such as battery powered instruments and systems, sensor measurements, medical equipment, and industrial automation. Moreover, the device has been built to bring flexibility and performance to any application requiring a high level of instrumentation accuracy.

The working principle of the AD8668ARUZ-REEL is based upon the general configuration of a differentialamplifier. The input signal is split and sent to both the inverting and the noninverting inputs of the differential amplifier. An adjustable gain resistor, Rg, is used to set the gain of the circuit. The output voltage of the circuit, Vo, is then given by the formula Vo = Gain * (Vin-Vin_1), where Gain is the gain of the circuit and Vin and Vin_1 are the voltages at both inputs of the amplifier.

The active circuit components of the AD8668ARUZ-REEL are a pair of P-Channel JFETs, an N-Channel MOSFET, and a pair of operational amplifiers. The operational amplifiers are configured as unity-gain followers to provide voltage-domain isolation between the input signal and the node of the differential pair. This configuration eliminates the need for an isolation resistor and provides both low-impedance and low-noise signal isolation.

The MOSFETs provide the variable gain signal isolation necessary in instrumentation applications. This device is controlled by a simple resistor network, which offers a wide range of adjustable gains from 0 to 200V/V. Furthermore, the MOSFETs provide excellent common-mode performance including low-noise, high-impedance, and temperature-compensated offset.

The AD8668ARUZ-REEL is an excellent choice for applications requiring high-performance, low-power instrumentation amplifiers. Its variable gain feature, combined with the low power operation, make it a great choice for any application. Its excellent common-mode performance and temperature-compensated offset make it suitable for a wide variety of applications, from battery-powered measurement systems to medical and industrial equipment.

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