PCM2903BDB

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The PCM2903BDB is a high-performance, low-power CODEC device with USB interface. As an essential component for USB audio solutions, the PCM2903BDB has become an important tool for developers to build high-definition audio products. Specifically, this device has been optimized to achieve satisfactory noise cancellation, low distortion and fast response even under low power and noisy environment. The PCM2903BDB also supports on-chip S/PDIF playback/recording, allowing designers to build a USB audio solution to be connected to digital audio systems with prevent over load problem.

PCM2903BDB Application Field and Working Principle

The PCM2903BDB is suitable for a number of applications including PC peripheral audio, multimedia cards, digital audio systems, telephones, and video/dvd systems. The chip offers a straightforward, cost-effective solution for implementing USB audio applications as it integrates an Audio Codec, USB interface, S/PDIF transceiver, advanced features such as MIC bias, advanced power management and flexible I/O pin configurations.

The PCM2903BDB utilizes a single 24-bit Delta-Sigma analog-to-digital converter (ADC) and single 24-bit Delta-Sigma digital-to-analog converter (DAC) which is capable of supporting a sample rate of up to 192 kHz while maintaining low power requirements. Additional features include an on-chip headphone amplifier, low-jitter PLL clock generator, differential input ADC, stereo headphone jack and more. All these components are integrated in a small 3.3v package which makes this CODEC an ideal choice for many applications.

The PCM2903BDB also supports a range of USB audio protocols such as USB 2.0 Audio Device Class (ADC) 1.0 and High-Speed Asynchronous Audio Protocol (HSAP). With USB 2.0 support, the PCM2903BDB supports simple plug-and-play audio solutions as well as high-performance playback/recording features. By utilizing the HSAP protocol, the PCM2903BDB is capable of much higher sample rates (up to 192 kHz) compared to the USB 1.1 Audio Device Class.

The PCM2903BDB utilizes a high precision internal oscillator and clock generator to achieve low jitter and excellent audio quality. This device supports two data formats: Integer PCM format and Floating Point PCM format, achieving bandwidths up to 96 kHz and sample rates up to 192 kHz depending on the supported format. In addition, the on-chip S/PDIF transceiver supports both transmit and receive functions and is compatible with industry standard formats.

The PCM2903BDB also supports various microphone inputs including differential, single-ended and Omni-directional input as well as providing a microphone bias voltage. This CODEC supports multiple output functions through its advanced I/O pin configuration, such as independent stereo headphone outputs, stereo line outputs, stereo line inputs and stereo digital outputs. With its powerful features and low power consumption, the PCM2903BDB is an attractive option for designers looking for an easy yet powerful solution for their USB audio applications.

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