INA128PA

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INPA128PA is a precision integrated circuit manufactured by Texas Instruments. It is a high-performance, monolithic instrumentation amplifier. It is designed to provide superior accuracy and wide dynamic range in low frequency and AC signal conditioning applications. It is ideal for use in medical, commercial instrumentation, or industrial applications, or any other application where precision is key. The INPA128PA is designed to provide excellent noise performance, low offset and low power consumption in a very small form factor.

The INPA128PA has a maximum voltage feedback of 8.8 volts and a maximum output voltage swing (Vos) of +/- 4v. It also has an adjustable gain range of 1 to 16 with a maximum closed-loop gain of 8. The INPA128PA also offers high common-mode rejection over its full gain range and may be used for a variety of single-ended or differential signal conditioning applications.

The INPA128PA uses a unique approach to instrumentation amplifiers by integrating an offset null circuit in the gain scaling network. This null circuitry allows the user to make very small input voltage adjustments in the order of microvolts with no effect on gain or linearity. This makes the INPA128PA well suited to AC or low frequency signal conditioning applications where precision and accuracy are important.

The INPA128PA can be configured with gains as low as 100dB. This makes it well suited to audio applications. Its low noise and low offset make it an excellent choice for applications such as level sensing and preamplification.

The INPA128PA has numerous applications in both the commercial and industrial markets. It can be used for a variety of instrumentation applications such as data acquisition systems, precision measuring instruments, and medical equipment. Other applications include industrial process control, audio systems, and data acquisition systems.

The INPA128PA is powered by a single supply voltage between 4.5V and 18V and has a maximum power dissipation of 400mW. It has excellent linearity and is highly stable over temperature and time. Its small form factor means it takes up minimal board space and it is easy to use and configure.

The working principle of the INPA128PA is based on the amplifier applied open-loop gain theory. The resistor network between the amplifier’s inputs applies a specific amount of gain to the selected open-loop gain configuration. The null circuitry positioned between the non-inverting input and the feedback node accurately nulls out the any unwanted offsets. This reduces the error in the gain calculations and makes the signal path more stable and accurate.

To simplify the design process for the user, Texas Instruments offers the INPA128PA in a variety of packages. These packages include the Thin-Chip Quad in a 10 pin MSOP, the Thin-Chip Mini in a 7-pin SOIC, and the Thin-Chip Small in a 6 pin SOT23. The Thin-Chip Quad is the largest and most robust of the packages and offers the highest performance.

INPA128PA is an excellent choice for precision AC and low-frequency signal conditioning applications. With its high-performance, small form factor and low power consumption, it is ideal for use in audio systems, medical equipment, level sensing and preamplification applications. Its null circuitry makes it a great choice for applications requiring low-noise and accuracy.

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