Second gen audio DAC chip for hi-res audio playback with exclusive HD monaural mode

ROHM has developed the 32-bit D/A converter IC (DAC chip) and evaluation board designed for flagship models in the MUS-IC series optimised for high-resolution audio playback.

Engineered to extract and accurately convert high-resolution sound data to analogue maximally, DAC chips are crucial for determining audio equipment quality. The company uses over 50 years of expertise in audio IC development to establish superior sound quality design technology, delivering products such as high-fidelity sound processors and high-quality audio power ICs.

The company's latest product builds on the first-generation MUS-IC BD34301EKV audio DAC chip, recognised for its sound quality and widely adopted in high-end models from various companies. The BD34302EKV inherits the core design concept behind its DAC chip – natural flat sound – and, by adding the three elements of spatial reverberation, quietness, and dynamic range from the series to authentically reproduce the 'texture' of musical instruments for an even more realistic audio experience.

By including a new algorithm for Data Weighted Averaging (DWA), the device achieves a THD+N characteristic of -117dB (THD: -127dB), a key performance indicator that improves sound quality by attaining a sound quality that conveys a realistic sense of texture. At the same time, the SNR of 130dB provides noise performance befitting a flagship DAC chip, while a sampling frequency of up to 1,536kHz allows customers to fully leverage the high-precision calculations of their DSPs.

In monaural mode, which allocates one DAC chip per channel, the company's proprietary HD monaural mode contributes to smoother, more natural sound. As part of the MUS-IC series, uncompromising craftsmanship has been applied down to the smallest details. Based on years of expertise in sound quality design, the optimal bonding wire material for each terminal of the BD34302EKV was selected to convey the natural 'texture' of musical instruments accurately. These features help create the ideal sound sought by high-end audio manufacturers.