LMC6464AIMX

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The Linear-Amplifiers-Instrumentation OP-Amps, Buffer-Amps category includes a wide range of focused and high-precision open-loop amplifier ICs extensively used in a variety of instrumentation or signal conditioning circuits. Among the most popular ICs of this category, the LMC6464AIMX, a high-precision, low-noise IC, stands out for its numerous excellent performance features. In this article we will overview its application field, circuit schematic and working principle.

Application Field

The LMC6464AIMX is an ideal choice for a variety of signal conditioning applications, such as signal amplification, level translation, filtering, and isolation. Most popularly, it is used in many analog-to-digital converter (ADC) applications and other signal conditioning circuits. Besides ADC applications, the LMC6464AIMX is also used in audio, medical, industrial and automotive circuits. In audio amplification applications, it is used to boost signal level and minimize noise, while in industrial and automotive applications, it is mainly employed in isolating power supply and ground loops. In medical applications, it helps improve operational amplifiers\' precision, filtering and isolation.

Circuit Schematic and Working Principle

The LMC6464AIMX offers users an integrated, high-precision open-loop amplifier solution that allows for high levels of signal gain, up to -18dB, with low offset and low drift. The schematic diagram below illustrates its configuration:

The difference between the inverting and non-inverting inputs serves as the amplifier\'s input signal. This signal is applied to the Op-Amp whose output is used to drive the error correction amplifier. The error amplifier controls the drain current of the voltage regulator MOSFET, and the output voltage is self-regulated. The non-inverting input is also used to set the gain, which is adjustable from -18dB to + 4dB.

The LMC6464AIMX also offers an ultralow noise level—

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