OPA128SM

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OPA128SM is an instrumentation amplifier and one of the most trusted and widely used product within its category. It is mostly used in health and safety-critical systems, which requires extremely precise and reliable amplification. The device features a single-supply operating range from 3.0V to 24V (Split ±1.5V to 12V) and is used for precise monitoring of sensor signals in a wide range of industrial, automotive and consumer applications.

The OPA128SM is a high-performance, versatile and programmable three-channel instrumentation amplifier with an extremely low offset voltage drift (zero-drift). It features a low offset voltage of 0.TFS and a high Common Mode Rejection Ratio (CMRR) of 107 dB at 10Hz, lowering the amount of noise and noise-induced interference in the amplified signal.

The OPA128SM has an optimal power-to-performance ratio and a wide operating temperature range of -40° to +125°C. This low power amplifier offers a massive adjustable gain range of 2V/V to 1000V/V, making it suitable for a wide range of applications. Its wide input common range and low bias current output make it perfect for current as well as voltage measurements.

The OPA128SM also operates on very low noise levels, consuming only 37µA of current, meaning it is an ideal choice for low measurement noise level applications. The device has an operating bandwidth of unity-gain from DC to 20kHz and its 3-channel differential inputs and outputs are kept apart by an ESD protection power diode.

The working principle of the OPA128SM is simple. The device takes an incoming signal, amplifies it and then outputs three channels of amplified signal. The first channel is amplifies by a single gain, whereas the remaining two channels are amplified by a different gains. The way to program the gains is by using two resistors in a ladder configuration. The resulting outputs of the OPA128SM are then applied to the required sensors which receive the inputs and generate the corresponding outputs.

The OPA128SM is used in a wide range of applications such as industrial automation, medical instrumentation, automotive testing, process control and consumer electronics. In medical instrumentation, the OPA128SM is used as a low-noise amplifier in EKG and EEG amplifiers and in blood pressure monitors. In automotive testing, the device finds its use in battery management systems, engine and transmission control, ignition systems, and auto-diagnosis systems. In industrial automation, the OPA128SM is used for high-precision measurements, motion control, vibration measurement, air quality and water quality monitoring, etc.

In conclusion, the OPA128SM is a high-performance three-channel instrumentation amplifier that offers a single-supply operating range from 3.0V to 24V. It features a low offset voltage of 0.TFS, a high Common Mode Rejection Ratio of 107 dB at 10Hz, and a wide operating temperature range of -40° to +125°C. Its wide adjustable gain range, low bias current and low noise operation makes it suitable for a wide range of applications, including industrial automation, medical instrumentation, automotive testing and consumer electronics.

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