INA250A3QPWRQ1 Integrated Circuits (ICs)

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Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

The INA250A3QPWRQ1 is a single-supply, precision bidirectional current sense amplifier. It is a low-cost, low-power solution to precisely measure current in various automotive, industrial, and communications applications. It operates from a 2.7 V to 16 V supply range, has a minimum sensing voltage of 0.1 mV, and provides a high-current-sense accuracy of ±0.5%.The device features a linear hold circuit to ensure that current peaks are detected and integrated, three selectable gain options, and a PWRQ1 package for improved thermal performance and space savings. The INA250A3QPWRQ1 is qualified in accordance with Automotive Electronics Council (AEC) standards.

Principles of Operation

The INA250A3QPWRQ1 current sense amplifier is based on a differential input stage with two input pins connected to the series resistor. The voltage is the voltage drop across the series resistor, which is directly proportional to the current flowing through the resistor. A differential structure allows common mode noise to be rejected, increases the signal integrity, and provides better temperature stability. As a result, the output signal is relatively free of common-mode noise, even when measuring large differential voltages.Differential pairs of transistors are used to create gain and provide the signal-intensity control. The output stage consists of a single transistor (NMOS) and an emitter-follower circuit. The output stage is designed to provide a balanced output and an accurate linear response over a wide dynamic range of input signal amplitude and frequency.The device also features a low-noise amplifier, which amplifies the differential signal, and an output stage, which provides an integrated signal and linear hold feature. The integrated signal is stored in the non-volatile memory, and the hold feature allows the signal to be held until the device is reset.Additionally, the INA250A3QPWRQ1 has a programmable gain feature, which allows the user to select the gain setting most suitable for their application.

Applications

The INA250A3QPWRQ1 is suitable for a variety of automotive, industrial, and communications applications. Typical applications include current sensing and control in motors, battery management systems, power converters, power amplifiers, solar energy systems, lighting systems, automotive power devices, and power monitoring systems.The high-current-sense accuracy and low-power operation of the device make it suitable for applications where precise current monitoring and measurement are required. The low-input offset and fast response time of the device also enable it to be used in real-time control systems, such as motor controllers and solar energy controllers.The programmable gain of the INA250A3QPWRQ1 allows the device to be used in applications that require different gain settings. The high-density packaging of the device helps save board space and allows for higher integration.

Conclusion

The INA250A3QPWRQ1 is a single-supply, precision bidirectional current sense amplifier ideal for a wide range of automotive, industrial, and communications applications. It offers a minimum sensing voltage of 0.1 mV and a high-current-sense accuracy of ±0.5%. The device features a linear hold circuit, three selectable gain options, and a PWRQ1 package for improved thermal performance and space savings.The high-current-sense accuracy, low-noise operation, and programmable gain feature of the device make it well suited for current sensing and control in motors, battery management systems, power converters, power amplifiers, solar energy systems, lighting systems, automotive power devices, and power monitoring systems.

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