AD711KR

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The AD711KR is a very versatile and cost-effective instrumentation amplifier that offers extraordinary performance in a single package. It is a true single-ended instrumentation amplifier with the best common-mode rejection (CMR) of any comparable device on the market. This product offers very low noise, low distortion, high common-mode rejection, and excellent common-mode temperature stability.

The AD711KR is ideal for measuring low-level sensor signals in medical, industrial, consumer, and other instrumentation applications. It eliminates the need for a separate pre-amplifier and improves the signal-to-noise ratio in biomedical, photoelectric, and sound transducer applications. Furthermore, the AD711KR is also capable of providing excellent high frequency performance up to 1 MHz.

Application Field

The AD711KR is suitable for use in a variety of instrumentation and control applications, including pressure and level sensing, current measurement and monitoring, limited temperature measurements, high speed data acquisition systems, and closed loop control systems. It can also be used for strain gage bridge amplifiers, Hall effect amplifiers, and thermocouple amplifiers in many industrial and medical applications.

The AD711KR excels in low-level signal measurement and instrumentation applications, such as in biomedical, photoelectric, and sound transducer applications where a low noise pre-amplifier is essential. It can also be used in high-speed data acquisition systems to provide excellent signal-to-noise ratio. Furthermore, the AD711KR has the ability to provide excellent high frequency performance up to 1 MHz.

Working Principle

The AD711KR is a differential input, single-ended output instrumentation amplifier with exceptional accuracy, stability and versatility. It is composed of three main parts: two matched gain stages (G1 and G2), a differential input stage (U3), and a output buffer (U1). The two gain stages, U1 and U2, offer unity gain in non-inverting configuration while U3 controls the differential gain. U1, the output buffer, amplifies the output signal from the instrumentation amplifier and delivers it to the output.

The AD711KR has an extremely high common-mode rejection ratio (CMRR) of greater than 80 dB. This allows it to reject any unwanted signal or noise that is present in both input lines. It also has very low noise levels, making it ideal for use in low-level signal measurement and instrumentation applications. The device is also capable of high speed operation and can handle frequencies up to 1MHz allowing it to be used in high-speed data acquisition systems.

The AD711KR is powered by a single-supply voltage between +9V and +15V. It also features two independent bias circuits, which provide independent adjustment of the gain of the two stages. This allows the device to be adjusted to the exact gain requirements of any given application.

Overall, the AD711KR is an extremely versatile and cost-effective instrumentation amplifier that offers extraordinary performance in a single package. It is ideal for use in a variety of instrumentation and control applications, offering excellent common-mode rejection and high-speed performance. The two independent gain stages, differential input stage, and output buffer combine to make the AD711KR an ideal choice for low-level signal measurement and instrumentation applications.

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