MCP6034T-E/SL

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MCP6034T-E/SL Application Field and Working Principle

The MCP6034T-E/SL is a monolithic high voltage op-amp designed for linear, instrumentation, and other applications requiring a higher voltage than normally supplied by standard op-amp ICs. The MCP6034T-E/SL is available in the 5-lead SOT-23 package and features rail-to-rail input and output, low offset, low drift, and adjustable gain and bandwidth.

Features

• Wide supply voltage range of 15V to 130V
• Input common-mode voltage range extends below ground
• High slew rate of 7V/µs
• Low offset voltage of only 400µV
• Low input bias current of only 0.3nA
• Low input noise voltage of only 15nV/rt Hz
• Output current of 150mA

Application Fields

The MCP6034T-E/SL op-amp is suitable for use in a wide range of linear, instrumentation, and other applications requiring a higher voltage than standard op-amp ICs. It can be used for motor control, battery powered systems, biological monitoring, strain gauges, pressure sensors, and other applications. It is particularly well-suited for instrumentation amplifiers, high-side current sense amplifiers, active filters, op-amp RS-485 transceivers, and analog-to-digital converters.

Working Principle

When the MCP6034T-E/SL op-amp is being used as a linear amplifier, its input stage is configured as a differential amplifier, with input transistors connected “back-to-back” to form two differentially connected pairs. One pair is connected to the input, and the other pair is connected to the output. The differential pair amplifies the voltage difference applied to the input, and amplifies it to the output. This amplifying action is controlled by the bias current applied to the differential pair, and the gain of the amplifier is determined by the ratio of the differential pair\'s bias current to the total current passing through the differential pair.

The output stage of the MCP6034T-E/SL is connected as an emitter-follower, with the output transistor connected to the emitter of the differential pair, and the wattage resistor connected to the emitter of the output transistor. This emitter-follower configuration provides a gain-of-one voltage amplification, while still allowing a large output voltage swing.

The MCP6034T-E/SL is designed to be used in both single and dual polarity supply configurations. In a single polarity supply configuration, the input common-mode voltage range extends below ground, allowing it to be used as both a differential amplifier and a (positive) common-mode amplifier. In a dual polarity supply configuration, the input common-mode voltage range is limited to the negative side of the dual-polarity supply, allowing it to be used as a (negative) common-mode amplifier.

The offset voltage of the MCP6034T-E/SL is adjustable through the offset voltage trim pin, allowing the op-amp to be calibrated to the desired accuracy. The slew rate of the MCP6034T-E/SL is adjustable through the gain bandwidth product pin, allowing the amplifier to be tuned for optimal performance in applications requiring high-frequency operation.

Conclusion

The MCP6034T-E/SL high voltage op-amp is an integrated circuit designed for a wide range of linear, instrumentation, and other applications requiring a higher voltage than normally supplied by standard op-amp ICs. It is suitable for motor control, battery powered systems, biological monitoring, strain gauges, pressure sensors, instrumentation amplifiers, high-side current sense amplifiers, active filters, and many other applications. The MCP6034T-E/SL has a wide supply voltage range of 15V to 130V, low offset voltage of only 400µV, and adjustable slew rate and bandwidth.

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