MIC861BC5-TR

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The MIC861BC5-TR is an instrumentation amplifier (IN) optimized for excellent performance over a wide range of conditions. It offers an easily adjustable gain block and unity gain flexibility, making it ideal for precision signal conditioning in optimal operating conditions. This device is part of the Microsemi Linear Solutions family, providing advanced linearity and low noise performance in one package.

The MIC861BC5-TR is a general purpose single-channel, low-cost IN amplifier that features a wide gain-setting range of up to 50dB, as well as excellent output source/sink current, low distortion, and low offset. The amplifier is optimized for operation over a wide frequency range and is designed for a variety of applications in signal chain processing.

The MIC861BC5-TR features two inputs: an inverting input and a non-inverting input. A voltage divider network sets the gain of the amplifier by controlling the feedback resistor ratio. The gain can be adjusted from unity to a maximum of 50dB, depending on the ratio of the feedback resistors. A frequency compensation network (R1 in the schematic of Fig. 2) allows the amplifier to attain maximum gain and stability within the given gain range.

The output amplifier consists of a Class A driver transistor that drives the output MOSFET in Class AB mode. This allows the amplifier to achieve low distortion, even at high output currents. By-pass capacitors connected to V+ and V- ensure the device has excellent common-mode rejection, while a resistor connected to V+ limits the offset voltage to less than 10mV.

The MIC861BC5-TR is designed to operate from dual 5V power supply, but can also be run from a single 5V supply. This makes it suitable for applications where a single supply is preferred. Due to its low power dissipation, this device produces very little heat and can operate from a standard 9V battery.

The MIC861BC5-TR offers excellent performance in audio, video and precision signal conditioning applications. This device is suitable for applications such as process control, duct pressure control and optical inspection. The device offers considerable freedom in its design, allowing designers to customize their own amplifier configuration to meet their requirements.

In summary, the MIC861BC5-TR is a low-cost IN amplifier that offers an easily adjustable gain block and excellent performance over a wide range of applications. It is a general purpose amplifier that can be used in audio, video and signal conditioning applications. Its low power consumption, wide frequency range and excellent common-mode rejection make it ideal for applications requiring precision and stability in demanding conditions.

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