INA129PA

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The INA129PA is a high-precision, low-power instrumentation amplifier designed primarily for use in industrial, scientific and medical applications. The INA129PA is designed to offer superior accuracy and low drift in low-voltage systems.

The INA129PA is a complete dual operational-amplifier package, containing two identical operational amplifiers in a single 8-lead SOIC package. Its small size and low power consumption make it ideal for use in battery-powered and portable applications, while its precision and stability make it suitable for use in a wide range of industrial, scientific and medical (ISM) applications.

Application Field

Due to its superior accuracy and low drift, the INA129PA is widely used in industrial, scientific and medical applications requiring precise measurements from low-voltage sources. Examples include thermocouple and RTD measurements, strain gauge bridge measurements and precision current- or voltage-measurement systems.

It is also suited for applications such as industrial process control, factory automation and data acquisition systems, where high accuracy and low drift are essential, as well as medical instrumentation, scientific research equipment and patient monitoring systems.

Working Principle

The INA129PA is a fully differential, precision instrumentation amplifier, consisting of two identical operational amplifiers (op-amps), connected internally in series. Each op-amp has two inputs (non-inverting and inverting) and one output. The two inputs are optimized for low input bias current and high common-mode rejection.

The non-inverting input of the first op-amp is connected to the input of the circuit (where the signal to be measured is applied), and the output of the first op-amp is connected to the inverting input of the second op-amp. The output of the second op-amp is the output of the circuit. The gain of the instrumentation amplifier is determined by the ratio of the resistors connected to the input of the first op-amp.

The precise gain of the circuit is determined by the ratios of the resistors connected to the inputs, which also allow for the precise adjustment of the offset voltage at the output. The design of the INA129PA also allows for a very low input offset voltage, which ensures precise measurements of low-level signals.

In addition to precise gain control, the INA129PA also features low-noise operation, high common-mode rejection, wide bandwidth, and low power consumption. This makes it ideal for use in industrial, scientific and medical applications where precise measurements and low power consumption are essential.

Overall, the INA129PA is a precision instrumentation amplifier designed to offer excellent accuracy and low drift in low-voltage applications. It is a good choice for a wide range of industrial, scientific and medical applications where precise measurements from low-voltage sources are required.

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