MAX4289EUT-T

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The MAX4289EUT-T is a low quiescent current, low power, high-voltage Rail-to-rail output, low-voltage single supply, instrumentation amplifier (IA), featuring an input common-mode range extending beyond both supplies for single supply operation, and a low supply voltage operation down to 2V. The device belongs to the linear amplifiers, instrumentation OP amps, and buffer amps family, providing a high precision and wide versatility for use in many applications in varying conditions.

The MAX4289EUT-T is a unique device since it provides a common-mode input range as wide as ±100V on each input pin with a single power supply of only 2V. This amplifier can work from a wide range of supply voltage from 2V to 36V with low power consumption. This makes the MAX4289EUT-T ideal for measuring and amplifying low-level signals in high voltage conditions.

The working principle of the MAX4289EUT-T is based on its rail-to-rail output stage, which is designed to have an output current capability of up to 100mA. It consists of an internal transimpedance amplifier, which converts an input voltage to an output current. The transimpedance amplifier is then connected to an output buffer, which converts the output current back to an output voltage. The overall principle of operation is such that the input voltage is amplified by the transimpedance amplifier and the output of the transimpedance amplifier is then buffered by the output buffer, to produce a high impedance but rail to rail output voltage.

The output range of the MAX4289EUT-T extends from 0V to the positive power supply voltage (V+). Therefore, to produce an output voltage that is less than the positive power supply voltage, a negative input voltage is required. Consequently, this device makes it possible to measure and amplify low-level signals in high voltage conditions, without necessarily having to use a negative power supply. Furthermore, the MAX4289EUT-T features an integrated 250nA input bias current limiting function, enabling the device to remain stable in the presence of input offset voltages up to 100mV.

The MAX4289EUT-T is a versatile device, suitable for a variety of applications. Its low power and single supply operation make it ideal for battery powered portable applications, such as medical equipment, wearables, computing systems, audio preamplifiers, line receivers, microphone preamplifiers and optical preamplifiers. Due to its off-state output bringing its output within common mode of the input and allowing for rail-to-rail output swing under a single-supply, low-voltage operation, the MAX4289EUT-T is an ideal choice for instrumentation amplifiers, analog-to-digital converters, loop power applications and low power sensor interfaces.

In summary, the MAX4289EUT-T is a low power, high voltage, Rail-to-rail output, low-voltage single supply, instrumentation amplifier, ideal for use in a variety of applications, such as medical equipment, wearables, computing systems, audio preamplifiers, line receivers, microphone preamplifiers, optical preamplifiers, instrumentation amplifiers, analog-to-digital converters, loop power applications, and low power sensor interfaces. With an input common-mode range extending beyond both supplies for single-supply operation, and a low supply voltage operation down to 2V, the MAX4289EUT-T is a reliable and accurate device, which enables high precision measurements in high-voltage conditions.

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