MAX4287EUA

Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

The MAX4287EUA is an 8-pin, single, low noise operational amplifier ideal for applications that require enhanced signal precision, such as instrumentation, medical, automotive and audio systems. The device is designed to have a low offset voltage with a wide temperature range, and has a high input impedance. The device operates from a single +2.7V to +13.2V power supply, allowing it to be used in various markets and applications due to its low power consumption.

Working Principle

The MAX4287EUA is a single-output, instrumentation, OP Amp and Buffer Amplifier that uses a negative feedback configuration. The feedback is realized by a voltage divider network connected between the output and inverting input pins of the device. The feedback along with the gain is set by selecting two external resistors, whose ratio sets the amplifier’s gain.

The amplifier circuitry consists of an intrinsic gain stage, an input buffer and a voltage follower. The internal gain stage along with an external resistor forms the feedback network. The input buffer stage provides a high impedance to the signal, which helps to reduce the loading of the preceding stage by the amplifier. The voltage follower is used to isolate the output from the preceding stage, which helps reduce the power supply noise on the amplifier output, thus providing a low output noise.

Features

The MAX4287EUA offers a wide range of features to help reduce component count and to optimize the performance of the circuit. It features high input impedance, high common mode rejection ratio and low offset voltage. Additionally, it features an exceptionally low 1/f noise at high gain and an available slew rate of 0.6V/uS. It also includes short circuit protection and thermal shutdown protection, making it a great choice for high reliability and performance.

Application Field

The MAX4287EUA is an excellent choice for a variety of high precision signal conditioning and processing applications. It is well suited for low noise instrumentation signal conditioning, low noise filtering and control loops. Additionally, it is ideal for data acquisition systems, extremely tight tolerance systems, medical instrumentation and high performance audio systems.

It can also be used for automotive applications such as motor or sensor control, or for RF gain or signal distribution control. The device is also ideal for a variety of electronic safety systems as it is able to detect any abrupt changes in parameters in a very short time.