ISL54001IRTZ-T

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ISL54001IRTZ-T Linear Audio Amplifier – its Application Field and Working Principle

The ISL54001IRTZ-T (hereinafter referred to as “the device”) is a linear audio amplifier designed for professional purposes. The device is suited for high-fidelity audio systems, providing excellent sound quality, operational reliability and gain control.

It features an IC-transistor hybrid amplifier that combines the advantageous features of two types of amplifiers: low distortion and high voltage capability of one kind, and low noise and low switch-on/off distortion of the other kind. The resulting combination is an amplifier with an attractive price-performance ratio.

The device can be used in almost any of the following professional applications:

• Live sound reinforcement, including loudspeakers and microphones;
• Studio recording and post-production of music;
• Live/On-stage sound reinforcement;
• Rehearsal rooms;
• Live broadcast;
• Studio/location radio/TV broadcasting;
• Audio/video duplication and post-production.

The device offers a maximum output power of 2W, which is more than adequate for typical applications. It operates in a wide range of supply voltages, from 3.3V (3.3V LDO) up to 40V, and is capable of achieving high levels of output power at low distortion figures. The device has a wide voltage swing and low distortion figures, with THD+N of 0.006% at 1V RMS and 0.07% at 1W RMS.

This makes the device suitable for a variety of audio systems, including professional sound reinforcement, studio recording, broadcast and duplication. Additionally, the device features low quiescent power consumption for battery-powered applications.

The device features a two-stage amplifier topology, consisting of a current-feedback preamplifier (CFP) and a conventional class-A power amplifier. The CFP provides excellent sound quality and distortion characteristics, with adjustable gain control for a wide range of ratios. The power amplifier is a conventional class-A circuit, optimized for maximum linearity and low noise performance, suitable for typical professional sound reinforcement applications. The combined two-stage amplifier provides high power output with low distortion, making the device suitable for both live sound and studio recording applications.

The device also features a built-in frequency response shaper (FRS) to improve linearity and frequency response. FRS is a type of post-filtering technique that can be used to reduce low-frequency distortion and mid-frequency nonlinearities that are audible in linear audio amplifiers, as well as improve sound quality and definition in audio systems. It is adjustable and allows the engineer to modify the response of the amplifier to suit any application.

The device also features protection circuitry to protect against over-current, and EMI safety features to protect against the effects of electrostatic discharge (ESD). This makes the device suitable for use in environments that may be subject to high levels of interference or electrostatic discharge. It also features a wide supply voltage range, so that it can be used with a wide range of supply voltages.

In conclusion, the ISL54001IRTZ-T is a linear audio amplifier suitable for a wide range of professional applications. It features an IC-transistor hybrid amplifier, low distortion figures and excellent sound quality, as well as a variety of protection features. The device is suitable for both live sound and studio recording, and its adjustable frequency response shaping makes it a versatile and powerful choice for any of these applications.

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