AD1954

The AD1954 is a complete 26-bit single-chip 3-channel digital udio playback system with built-in DSP functionality for speaker qualization, dual-band compression/limiting, delay compensation,and image enhancement. These algorithms can be used to ompensate for real-world limitations of speakers, amplifi ers, and istening environments, resulting in a dramatic improvement of erceived audio quality.

The signal processing used in the AD1954 is comparable to that ound in high-end studio equipment. Most of the processing is one in full 48-bit double-precision mode, resulting in very good ow-level signal performance and the absence of limit cycles or dle tones. The compressor/limiter uses a sophisticated two-band lgorithm often found in high-end broadcast compressors.

An extensive SPI port allows click-free parameter updates, along ith read-back capability from any point in the algorithm fl ow. he AD1954 includes ADI's patented multibit - DAC architecture. his architecture provides 112 dB SNR and dynamic range nd THD+N of 100 dB. These specifi cations allow the AD1954 o be used in applications ranging from low-end boom boxes to igh-end professional mixing/editing systems.

The AD1954 also has a digital output that allows it to be used urely as a DSP. This digital output can also be used to drive an xternal DAC to extend the number of channels beyond the three hat are provided on the chip.

his chip can be used with either its default signal processing rogram or with a custom user-designed program. Graphical programming ools are available from ADI for custom programming.