AMP04ESZ

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Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

The AMP04ESZ is a four-channel, monolithic differential amplifier used in instrumentation and buffer amplifier applications. The device is capable of delivering up to 3.2 watts into a 50VDC load, with a gain cutoff frequency of 1MHz. It is designed to improve on the traditional single-ended differential amplifier by providing a lower power consumption and greater accuracy in controlling the gain.

Applications

The AMP04ESZ is well suited for precision instrumentation and audio applications. It provides superior performance in systems such as ultrasonic level meters, medical instruments, seismic data acquisition, automotive battery testers, and other precision data capture and feedback loops. Its low offset voltage and low common-mode gain simplify the design of high-precision, low-noise applications.

Features

• High common-mode rejection ratio (CMRR): 85dB @ 0.1Hz, 70dB @ 1kHz
• Low offset voltage (<500uV typical)
• Low common-mode gain (<200V/V typical)
• High input impedance: >10^10
• Low power consumption: 0.3W/channel
• Low-noise: 0.02uV/rt-Hz
• Thermal protection circuit

Working Principle

The AMP04ESZ operates by amplifying the input voltage applied to its inputs terminals and reproducing the amplified signal at its output terminals. It uses a differential amplifier architecture, which enables it to reject any common-mode input signals, providing superior performance in noisy environments and high-precision applications.

The differential amplifier consists of two pairs of transistors, one pair for each channel. Each transistor in a pair has one input terminal and one output terminal, the output terminal of one transistor being connected to the input terminal of the other transistor. This arrangement enables the differential amplifier to amplify the difference in the input signals applied to the two input terminals.

In addition to the differential amplifier, the AMP04ESZ includes a number of additional features. It provides protection against overload and thermal runaway. An internal compensation network ensures that the gain remains stable over the entire band of input frequencies. The device also includes low-noise current sources and an adjustable gain control..

Conclusion

The AMP04ESZ is an ideal amplifier for instrumentation and buffer amplifier applications. Its low power consumption and high accuracy make it well suited for applications such as medical instruments, ultrasonic level meters, and seismic data acquisition systems. Its excellent common-mode rejection ratio and low offset voltage provide superior performance in noisy environments, while its low-noise current sources and adjustable gain control ensure optimal performance.

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