AD8628WAUJZ-RL

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The AD8628WAUJZ-RL is a low power, low noise, wideband, quad CHP (Class AB) instrumentation amplifier with excellent CMRR and PSRR characteristics. It is designed specifically for precision measurements in industrial and medical applications where wideband signals, low power consumption and low noise are a priority. The device operates on a single supply range of 2.7V to 20V and also features a wide input common-mode range extending past the positive rail and below ground. The AD8628WAUJZ-RL also features high input impedance and low output impedance, making it an ideal amplifier for high speed applications. This device is perfect for wide dynamic range applications, including precision measurements.

Application Field

The AD8628WAUJZ-RL is an ideal amplifier for a wide range of linear applications, including data acquisition systems, thermocouples, RTDs and bridge transducers, high precision instrumentation amplifiers, medical and industrial instrumentation, medical imaging systems, high resolution medical imaging and radiology, medical monitoring systems and echo systems, instrumentation amplifiers for low power, test and measurement systems, and any other application requiring precision and low noise amplifying. With its low power, excellent CMRR and PSRR characteristics, wideband capability, and its ability to achieve high performance with single supply, the AD8628WAUJZ-RL is an ideal choice for this type of application.

Working Principle

The AD8628WAUJZ-RL is a single supply, low power, low noise, wideband instrumentation amplifier. It uses a combination of metal–oxide–semiconductor (MOS) field effect transistors (FETs) and complementary bipolar junction transistors (BJTs), along with resistors and capacitors to provide excellent CMRR and PSRR. The input stage of the amplifier consists of two differential FET stages, providing a very high input impedance, which allows the amplifier to accurately amplify low level signals. The next stage of the amplifier consists of two BJT stages, providing a high common-mode rejection ratio, low noise, and low distortion. The last stage of the amplifier is a complementary current source circuit, which provides a low output impedance and low distortion. This stage serves the purpose of providing a low output impedance buffer, which helps to reduce the voltage differences between the output and the input common-mode voltage. The amplifier is designed to operate within a wide supply voltage range of 2.7V to 20V. Additionally, the device features a wide common-mode range, allowing the device to accurately and precisely measure single-ended signals with a wide dynamic range.

The AD8628WAUJZ-RL is well suited for precision instrumentation applications, where wideband signals, low noise and low power consumption are of high priority. Its combination of FET and BJT transistors, high input impedance and low output impedance, along with its low power consumption and wide common-mode range, make the AD8628WAUJZ-RL the ideal amplifier for this type of application.

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