PCM3794ARHBT

PCM3794 is an advanced high-performance, low-power all-in-one CODEC, designed for various audio applications in the automotive, communications and potable/personal electronics markets. It is built as a single chip with a superior A/D and D/A converter, S/PDIF receiver and transmitter, features a programmable sample rate converter and DSP. As a single low-cost product, it eliminates the need for numerous device designs and provides enhanced features and a greater selection of international standard audio characteristics than current products. This makes it a perfect choice for applications such as CD, CD-R/RW, MD, mini disc, Super Audio CD, DVD, interactive CD, MP3, digital camcorder, multimedia PC, digital TV and many others.

The PCM3794ARHBT provides an 8-bit/16-bit PCM and/or I²S interface, an S/PDIF transmitter, a 16-bit/20-bit/24-bit ADC with up to 96kHz sampling rate, 24-bit Digital signal processor (DSP) with multiple sample rate functions, dual 24-bit/48kHz DACs with differential analog output driver and up to 48kHz sampling rate, signal-to-noise ratio of 105dB, and a very low power dissipation of 0.5W. The 12-channel ADC features on-chip selected window comparison functions, allowing a simple dc-coupled signal path for optimum signal transmission and reduced board cost. The device also supports additional 8-bit programmable internal functions, allowing configurations optimized for specific customer applications.

The PCM3794ARHBT CODEC architecture is an ad-hoc solution for high performance audio. It implements both A/D and D/A conversion, allowing it to interface with any system that performs signal processing, audio DSP, and sound output. The basic idea behind the architecture is to provide an interface for audio that harkens back to traditional A/D and D/A converter architectures. It is simple enough to be adapted to any system, with the appropriate level of mixing functions and signal processing capabilities.

The PCM3794ARHBT CODEC supports four different types of audio conversion; PCM, A-law, mu-law and I²S. PCM (Pulse Code Modulation) is used to encode analog audio signals into digital form. A-law and mu-law are used for recording in North American telecommunication systems. I²S (Inter-IC Sound Bus) is a digital audio interface designed to provide a low-cost method for transmitting audio data between digital devices. The most common use of this interface is to provide a digital audio interconnect between consumer electronic equipments such as CD and DVD players and digital music centers.

The PCM3794ARHBT CODEC is designed to interface audio systems with any digital source through S/PDIF. The CODEC automatically compresses audio signals to fit the accepted digital audio protocols and supports both PCM and non-PCM audio formats. In addition, the CODEC can adjust the input data rate and volume to accommodate different audio input formats. It also provides a Direct Digital Synthesis (DDS) technology for sampling frequencies up to 96kHz. This allows for higher quality sound than commonly available with CODECs used in consumer electronics.

The PCM3794ARHBT CODEC also features an on-chip DSP, allowing for sophisticated audio processing such as equalization, dynamic range and noise shaping. The DSP also supports programmability, allowing for custom audio effects to be added to the audio stream. In addition, the CODEC includes a high-performance, low-noise microphone pre-amplifier with digital gain control to reduce or eliminate environmental background noise.

The PCM3794ARHBT CODEC is suitable for a variety of applications, such as automotive, communications and personal electronics markets. In addition, it can be used in other portable and commercial environments, as well as broadcasting and telecommunications applications. The CODEC can also be used in combination with other digital audio inputs, such as digital television and digital radio, providing an ideal solution for digital-based applications.

In conclusion, the PCM3794ARHBT CODEC is a robust, low-cost solution for a wide range of audio applications. It provides the necessary features and performance to meet the demands of the market, and its features can be easily customized for specific customer needs. The CODEC also offers a high-performance, low-noise microphone pre-amplifier, as well as a Direct Digital Synthesis capable of providing high-quality sound with low-cost designs.