AD8138AARZ-R7

AD8138AARZ-R7 Application Field and Working Principle

The AD8138AARZ-R7 is an analog integrated circuit belonging to the family of linear amplifiers — special purpose. Specifically, this chip is a dual-channel integrated voltage feedback amplifier with an exceptionally low noise and fast slew rate. It has been designed for applications where unity gain buffer, gain switching, and amplifier stages with gain up to two are required.

Features

The AD8138AARZ-R7 provides user control over the gain and power options. In its single-ended operating mode, its gain can range from -0.7 V/V to +2.7 V/V. Other features include:

• Gain bandwidth product of 5 MHz
• Maximum gain accuracy of 0.1 dB
• Low distortion rate of 0.0003%
• Output current of 6 mA
• Common mode rejection ratio of 100 dB

These features make it ideal for medical imaging, instrumentation, and video line driving applications.

Applications

The AD8138AARZ-R7 can be used in a variety of applications requiring a low-noise, fast-slew amplifier. These include:

• Medical imaging systems
• Analog-to-digital and digital-to-analog converters
• Instrumentation amplifier design
• Video line driving
• Data acquisition systems

These applications make the AD8138AARZ-R7 a versatile amplifier that can be used in many different electronics applications.

Working Principle

The AD8138AARZ-R7 is a voltage-feedback integrated amplifier made up of two independent amplifier channels. Each channel contains two differential amplifier stages. A unity-gain output stage is included in each channel.

The amplifier utilizes voltage-feedback to achieve excellent noise and distortion performance over a wide bandwidth. It also has an internal output buffer that eliminates the need for an external buffer amplifier.

The inputs of the amplifier are differential and accept a wide range of single-ended or differential signals. Output signals consist of a differential pair and can be adjusted to a gain of up to two.

Conclusion

The AD8138AARZ-R7 is a dual-channel integrated voltage-feedback amplifier with exceptionally low noise and fast slew rate. It is capable of operating in single-ended mode with gains up to +2.7 V/V. Its features and applications make it an ideal choice for many applications such as medical imaging, instrumentation and video line driving.