AD648KRZ-REEL

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The AD648KRZ-REEL device is a precision companding linear amplifier optimized for high-precision audio applications. This amplifier provides a high accuracy gain and a low noise performance in a single chip, making it ideal for high-precision audio amplifiers, telemetry and instrumentation amplifiers, and other audio devices. This article will discuss the application field and working principle of the AD648KRZ-REEL.

Application Fields of AD648KRZ-REEL

AD648KRZ-REEL is mainly used in professional audio and instrumentation applications, such as audio mixing desks, recording systems and instrumentation amplifiers. It is optimized to provide superior gain accuracy and low noise performance, which makes it ideal for audio systems that require maximum signal fidelity and minimal distortion. It also features a wide gain range, temperature compensation and a high total harmonic distortion (THD) rating of 0.0019%.

The AD648KRZ-REEL is also useful in acoustic measurements and telemetry systems thanks to its wide bandwidth, high input impedance and low output impedance. This enables it to accurately measure sound pressure levels or other acoustic measurements, as well as convert AC signals into digital format for telemetry systems.

Working Principle of AD648KRZ-REEL

The AD648KRZ-REEL device operates as a companding linear amplifier. Companding is an analog linear function used to compress a signal\'s dynamic range. It involves boosting the signal\'s low-level components while attenuating its higher-level ones. This allows the system to achieve a lower noise performance while preserving its linearity.

The AD648KRZ-REEL uses two transistors, a bipolar junction transistor (BJT) and a MOSFET, to provide the desired companding linear operation. The BJT amplifies the input signal, while the MOSFET is used as an active compander, applying a nonlinear gain based on the voltage at the input node. This allows for precise control of the signal’s dynamic range and ensures an accurate output signal.

The AD648KRZ-REEL also features an internal temperature compensation circuit that compensates for variations in temperature and ensures consistent signal performance across a wide range of temperature levels. This ensures that the device maintains its accuracy across its operational temperature range of −35°C to +125°C.

Conclusion

The AD648KRZ-REEL is a high-performance companding linear amplifier that is optimized for high-precision audio and instrumentation applications. It features a wide gain range, temperature compensation and a high total harmonic distortion rating of 0.0019%. The device operates by amplifying the input signal with a BJT and compressing its dynamic range with a MOSFET-based active compander, which enables precise control and accurate signal performance.

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