ADA4084-2ARMZ-R7

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The ADA4084-2ARMZ-R7 is a single Amplifier developed by Analog Devices. It belongs to the ADA4084-2 family of wide-band, low-power and low-distortion Voltage Feedback Operational Amplifier (VFB-OPA). It is designed mainly for Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps applications.

The ADA4084-2ARMZ-R7 offers excellent performance with low open-loop gain, low input bias current and wide bandwidth. It provides low output offset voltage and low distortion for precision applications. It features common-mode rejection up to 80 dB and a slew rate of 1.5 V/µs. Its differential input voltage range can exceed the supply voltage and it can be used with a common-mode feedback network. The circuit can also operate from a single supply voltage as low as 4.5 V.

The ADA4084-2ARMZ-R7 is an ideal choice for linear, high-performance application areas like biasing, driving of high-speed sampling data converters, instrumentation, general-purpose linear amplification, buffering, AC/DC conversion and other similar applications. The amplifier is also suitable for use in RF, high-speed signal applications and low power audio environments.

The ADA4084-2ARMZ-R7 is pin-compatible with other members of the same family and comes in a wide range of voltage gain depending on the application. The amplifier has three temperature grades and (10%, 20%, 30%) CMRR performance which also vary by application.

The basic working principle of the ADA4084-2ARMZ-R7 is based on a dual-stage amplifier configuration with bi-directional gain control loop. It features two symmetric input stages in series, one of which is buffered by the second stage. The dual-stage amplifier allows the input stages to achieve fine control of the common-mode and differential-mode gains.

In the ADA4084-2ARMZ-R7, the gain of each stage can be adjusted independently by varying the internal feedback network. This can be done through external connections or through software control. By setting the appropriate feedback network, the amplifier can achieve high DC accuracy as well as high slewing rates. It also has good linearity and bandwidth due to its high slew rate and wide loop gain.

For added protection, the ADA4084-2ARMZ-R7 also features an over-voltage protection mechanism which monitors the input supply voltage and shuts down the amplifier if the voltage exceeds the specified limits. This ensures that the amplifier is protected against high supply voltages which can damage the components. Additionally, the amplifier also has an input-current monitoring circuit which shuts down the amplifier if the input current exceeds the specified limits.

Overall, the ADA4084-2ARMZ-R7 is an ideal choice for Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps applications. It offers excellent performance with low distortion, low power consumption and wide bandwidth. It is also pin-compatible with other members of the same family and can be used with a common-mode feedback network. Moreover, it features over-voltage protection, input-current monitoring and gain control loop for added protection and accurate performance.

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