LF398MX

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The LF398MX is an instrumentation amplifier with a low noise background and high output accuracy. It is designed to meet the requirements for a wide variety of applications such as automotive, industrial, and audio systems with minimal effort. A single device delivers optimal performance in a wide variety of applications, saving costs and product development time.

Application Field

The LF398MX is suitable for applications such as automotive, industrial, and audio systems where a low noise background and high output accuracy are required. Applications include active filters, audio systems, power amplifiers, power supplies, optical scanners, and similar high-precision systems. The LF398MX is also used for precision level detectors and signal conditioning systems. The high output accuracy and low noise characteristics of the LF398MX make it perfect for applications such as audio mixer circuits and data acquisition systems. Also, as the LF398MX is low cost, it is suitable for purposes such as signal switching.

Working Principle

The LF398MX is based on the principle of an instrumentation amplifier. It is designed to maximize the common-mode rejection ratio (CMRR), minimize the noise level (NF) and provide high-frequency response. The LF398MX amplifies the difference between two input signals, while rejecting signals that appear on both inputs. The LF398MX also features a high gain bandwidth product (GBP) and precise frequency band performance. This allows for quick and accurate processing of signals, regardless of the type of signal.

The LF398MX has a three-stage amplifier configuration for the common-mode input with an integrated amplifier for the differential input. The first stage contains an amplifier for the differential inputs, followed by a passive filter. The differential and common-mode gain are adjusted separately by the resistors and capacitors. The output of the amplifier is then buffered by the last stage of amplification, which provides a low output impedance and an adjustable offset voltage.

The LF398MX provides a low noise level and high accuracy. The amplifier has a wide input common-mode voltage range with a high input impedance and adjustable output offset voltage. The LF398MX also provides excellent common-mode rejection ratio, high gain bandwidth product, and low distortion. The amplifier is stable over a wide range of operating conditions and is suitable for use in a wide variety of applications.

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