PCM1791ADB

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The PCM1791A is a top-of-the-line Digital to Analog Converter (DAC), which is used in a variety of applications, from high-fidelity audio to automotive, industrial and medical applications. As a multi-channel DAC, it has some of the best performance in the industry, making it a preferred choice in audio and automotive applications. In this article, we\'ll take a look at the PCM1791A\'s application field and working principle, as well as its impressive performance.

Application Field and working Principle

The PCM1791A DAC is designed to deliver multi-channel, low-noise audio signals with low distortion levels. It has an internal current-output DAC, designed with 16-bit resolution. This allows it to provide an excellent frequency response, low-noise operation and high dynamic range. The DAC\'s multi-channel architecture is optimized for a wide range of applications, from consumer electronics and computer audio to automotive and industrial audio. In addition, it can be used as a reference DAC for a variety of applications, from battery-powered devices to programmable logic controllers.

The PCM1791A DAC works with a voltage-mode architecture and a multi-bit delta-sigma converter. The voltage-mode architecture allows the user to choose the input format of their choice, such as I2S and DSD. The multi-bit delta-sigma converter utilizes 13-bit conversion accuracy and a 48-kHz sample rate for a maximum performance of 100 dB dynamic range. The DAC also includes an 8-pin dynamic range control module, which allows users to fine-tune their system\'s dynamic range, resulting in improved clarity and quality.

The PCM1791A ADC integrates various features, from a headphone amplifier to an AES/EBU interface, which allows for seamless recording and playback of a wide range of audio signals. It is also equipped with a high-impedance, low-noise analog output stage, which eliminates the need for an external Class-D amplifier. In addition, it has an optional dual-dynamic range control module, which allows users to individually adjust the dynamic range on each audio channel to suit the application.

Process Control and Reliability

The PCM1791A DAC also integrates an on-chip low-dropout (LDO) linear regulator, which improves power efficiency and reduces power consumption. Additionally, it has an on-chip programmable gain amplifier, which can be programmed to provide a wide range of gains from 0.25mV to 68.3dBu. This enables the user to tailor the gain range to suit their needs.

The PCM1791A DAC is designed for exceptional reliability and increased process control. It features a highly-accurate audio signal processing algorithm, which provides excellent linearity and low distortion. It also features a low-jitter clock circuit, which ensures that audio signals remain crisp and clear. Furthermore, it is highly resistant to EMI interference and has a high protection rating IEC 60255.

Performance

The PCM1791A DAC is designed to deliver superb performance. It has an impressive signal-to-noise ratio of -120 dB, as well as a total harmonic distortion of 0.001%. These figures are excellent for a DAC of this type and make it an ideal choice for high fidelity audio applications. It also has an excellent frequency response of -3 dB at 20 kHz and -3 dB at 100 kHz. These figures mean that the device can be used for high-end audio systems, providing natural and accurate sound reproduction.

The PCM1791A DAC is capable of handling up to 24-bit DSD audio signals, giving it the ability to accurately reproduce audio with a high level of detail and clarity. It also has a wide range of input formats, including I2S, DSD, USB, HDMI and CD-ROM, allowing it to be used in many different audio applications. Additionally, it can be used with a variety of audio formats, such as WAV and MP3.

Overall, the PCM1791A is a top-of-the-line DAC that is perfect for a wide range of audio applications. It has a voltage-mode architecture and multi-bit delta-sigma converter and offers excellent audio performance with low-noise, low distortion and a wide dynamic range. In addition, it is highly reliable and can be used in a variety of audio systems. With its wide variety of features and impressive performance, the PCM1791A DAC is a great choice for any application.

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