PCM1794ADBG4

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The PCM1794A is a 24-bit 192kHz multi-channel digital-to-analog converter (DAC) designed for the professional audio market. It offers four DAC channels with an integrated headphone amplifier, low-jitter clock, and AES/EBU inputs. The PCM1794A utilizes advanced segment current steering architecture with independent power supplies for the two stereo DACs and dedicated dynamic range control logic for each channel. This allows for excellent dynamic range and low distortion. It is ideally suited for high-end audio applications such as home theater receivers, digital TVs, and DVD players.

The PCM1794A is a single-chip solution capable of processing digital audio data. Its versatile digital inputs can be connected to various digital audio sources, such as a digital television receiver, a home theater receiver or a DVD player. The serial audio interface (I2S/left-justified/right justified) supports sample rates up to 16/20/24-bit at 192 kHz. The integrated headphone amplifier can be connected to any standard 3.5mm jack for high quality headphones. It is powered by two 1.2V supply rails.

The PCM1794A utilizes advanced segment current steering architecture. This design features a full 24-bit resolution per channel with an 85 dB dynamic range. The dynamic range control (DRC) feature allows for independent dynamic range control (DR) for each channel. DRC is used to modify the audio level in order to maintain clarity in a noisy environment. This feature separates the PCM1794A from other low-end DACs which offer limited DR.

The PCM1794A also utilizes a low-jitter clock generator. The clock is based on an externally supplied master clock, allowing the PCM1794A to operate at sample rates up to 192 kHz. The clock is generated by a Programmable Phase Locked Loop (PLL) which eliminates the need for a separate clock source and ensures an accurate sample rate. This ensures a high quality audio signal.

The PCM1794A has a wide range of applications. It is often used in digital media receivers, Blu-Ray players, digital TVs and multimedia audio/video streaming applications. It is also used in high-end audio equipment, such as professional and home theater systems, as well as in studio recording applications.

To sum up, the PCM1794A is an advanced and comprehensive device with many features tailored for the professional audio market. It offers excellent sound quality with its low-jitter clock, dynamic range control and independent power supplies. Its range of digital inputs and its wide range of applications make it a perfect choice for many audio and multimedia applications.

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