AD8079AR Datasheet/PDFThe AD8079AR is an integrated circuit high-speed current feedback amplifier designed for instrumentation, OP amps, buffer amplifiers and other linear applications. It is a robust and versatile amplifier that offers excellent performance, noise, and load tolerance characteristics. The AD8079AR is a monolithic amplifier characterized by high speed, high accuracy, high gain, and high reliability. It is ideal for applications requiring a fast response with excellent linearity and accuracy, such as motor and power amplifiers, power control circuits, instrumentation, and audio applications.
Application Fields:
- Instrumentation - The AD8079AR is suitable for use in precision current and voltage transducer circuits, as well as other instrumentation applications. Its precision, accuracy, and low power consumption make it an ideal choice for a range of applications.
- OP Amps - The AD8079AR is a versatile option for high-speed OP amps. It offers excellent linearity, accuracy, and speed, making it suitable for a variety of analog and digital signal processing applications, including active filter circuits and audio circuits.
- Buffer Amps - The high-speed and excellent linearity of the AD8079AR make it an ideal choice for use in buffer amplifier circuits. Its high-speed and accuracy make it suitable for use in applications such as sample and hold circuits and signal conditioning circuits.
Working Principle
The AD8079AR is a current-feedback amplifier designed around a folded cascode topology. The device consists of a differential input stage, a current-feedback amplifier stage, and an output stage. The folded cascode topology enables the device to operate with low distortion and high linearity, making it ideal for audio and power applications that require high accuracy and precision. The input stage features a low gain bandwidth product and a high input impedance, allowing it to accurately convert small signal inputs into outputs with minimal distortion. The current-feedback amplifier stage gives the device its high-speed characteristics, while the output stage provides the necessary stability and load sensitivity.
The AD8079AR has a wide operating temperature range of -40°C to +85°C. It is rated for a maximum output current of ±200mA, which allows it to drive both low- and high-power loads. Additionally, the device is protected against input over-voltage and input over-current by integrated circuitry, making it suitable for use in harsh environments. Finally, the AD8079AR has an integrated reference voltage source, allowing it to operate without an external supply voltage.