PCM2902CDB

PCM2902CDB is an integrated circuit designed for use in the increasing audio and data conversion applications. It is a multi-mode dual channel CODEC (Coder-Decoder) that combines the functions of a dual-channel A/D-D/A converter and a stereo headphone driver. PCM2902CDB also includes a multi-mode digital filter, post-filtering processing and enhanced headphone-driving capability in one integrated circuit.

Application field of PCM2902CDB

PCM2902CDB is used in devices such as walkman players and telecommunication devices, where digital audio streams processed by various digital devices and require precision digital-to-analog converter DAC) and analog-to-digital converter (ADC) in order to transform the digital audio stream into analog signals for output or for further audio processing in the digital domain. It is also used in applications such as VoIP, enterprise audio products, consumer audio/multimedia products, and audio/data/video conferencing products.

Working principle

PCM2902CDB works by taking the input data from the connected device, then it processes the data in the high-performance multi-mode digital filter for the best possible signal to noise ratio (SNR). After the data has been filtered and the signal of interest is extracted, the data is then further down-sampled and de-mux. The demuxed data is then sent to the internal A/D-D/A converter to be converted into analog signal. The digital filter, enable PCM2902CDB to make sure that the final audio signal is of the highest quality.

Features

PCM2902CDB offers a wide range of features, such as:

• I2S/PCM serial input/output.
• A/D and D/A single ended and signal-to-ground (GND) outputs.
• Supports 24-bit resolution A/D and D/A conversion with 124dB SNR.
• Integrated DIGITAL-TO-ANALOG CONVERTER (DAC) for dual-channel audio.
• Integrated ANALOG-TO-DIGITAL CONVERTER (ADC) for dual-channel audio.
• Integrated 4-wire headset/stereo headset driver with mute/GND/L-R setting support.
• On-chip phase correction/post-filtering functions.
• Automatic gain and volume control.
• Programmable frequency and Low-Noise amplifiers (LNAs) for maximum flexibility.
• Auto mute for headphone and line out.
• Fixed volume setting for headphone and line out.

Conclusion

In conclusion, PCM2902CDB is a powerful and efficient CODEC that can be used in a variety of applications and uses, while providing the highest standards of audio quality. The features and on-chip processing and filtering offer high flexibility and a single-chip solution for all analogue-to-digital and digital-to-analogue (A/D&D/A) conversion, making it ideal for audio and data conversion applications.