MAX44248AUA+

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The MAX44248AUA+ is a low-power, low-noise, and wide bandwidth instrumentation amplifier from Maxim Integrated, designed for portable applications. It integrates precision voltage references and an adjustable gain amplifier with a wide bandwidth. This amplifier is capable of achieving up to +5V single-supply operation, an input common-mode range reaching the negative supply rail, and rail-to-rail output swing. It also features low offset voltage of 5mV and offset drift of 45uV/C.

The MAX44248AUA+ is a component of the integrated circuit (IC) family of in-amps, which is a type of linear amplifier used in precision signal conditioning tasks. These amplifiers are ideal for medical, audio, and laboratory instrumentation applications that require high-frequency response, low levels of noise, and high stability. These amplifiers offer a wide range of applications, such as precision voltage measurement, AC/DC current measurement, data acquisition, signal monitoring, signal filtering, signal generation, and sensors.

The main features of the MAX44248AUA+ include high input impedance and high common-mode rejection ratio. It also offers an adjustable gain range of up to 3.2V/V, a wide adjustable bandwidth from 25kHz to 1MHz, and low offset voltage of 5mV with offset drift of 45uV/C. Moreover, its wide input common-mode range goes from Vee −0.3V to Vcc + 0.3V, and its maximum input offset voltage is 5mV.

The MAX44248AUA+ is an ideal candidate for precision, low-noise instrumentation applications due to its superior characteristics in noise levels and gain stability. Its typical low noise performance is 0.8µVrms, and its gain drift is 0.2mV/C over its entire gain range. Additionally, this amplifier offers rail-to-rail output swing, meaning that its analog output signals swing from one rail to the other rail.

The MAX44248AUA+ is built with a circuit topology that provides excellent gain stability and accurate voltage references. At the heart of the circuit is a precision amplifier with an adjustable gain, fine-tuned by a resistance network. The adjustable gain allows different gains and sensitivities within a single device. This resistance network allows the amplifier to be adjusted so that its gain can be set to any arbitrary amount within the range.

The output of this amplifier is completely independent of the supply voltage. This implies that if the input of the amplifier is connected to the same voltage level as the input common-mode, the output will remain unaffected. This attribute is very beneficial in applications that are vulnerable to voltage changes.

In addition to its high input impedance, the MAX44248AUA+ offers a propagation delay of 1.5µs and a maximum power consumption of 3mW. This amplifier is available in a low-profile TSSOP-16 or a small, lead-free, RoHS-compliant QSOP-8 package. This device supports temperature ranges from −40°C to +85°C.

From the above, it is evident that the MAX44248AUA+ has great potential in various applications, offering a wide spectrum of performance and features, making it an ideal candidate for precision, low-noise, fast-response instrumentation applications. Its adjustable gain and low-noise performance make it suitable for medical, audio, and laboratory instrumentation applications.

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