AD1954 Analog Devices, AD1954 Datasheet
AD1954
Manufacturer Part Number
AD1954
Description
SigmaDSP Digital Audio Processor
Manufacturer
Analog Devices
Datasheet
1.AD1954.pdf
(36 pages)
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a
SigmaDSP and Phat Stereo are trademarks of Analog Devices Inc.
Preliminary Technical Data
CLOCK INPUTS
SERIAL DATA
MASTER CLOCK
SERIAL DATA
MASTER
AUX SERIAL
DATA INPUT
INPUTS
SPI INPUT
SPI DATA
OUTPUT
OUTPUT
OUTPUT
3
3
3
3
3
PRELIMINARY TECHNICAL DATA
MCLK
MUX
SERIAL CONTROL
AUDIO DATA
INTERFACE
MUX
(256/384/512 f
GENERATOR
FUNCTIONAL BLOCK DIAGRAM
MCLK
S
)
SigmaDSP
3.45 (DOUBLE PRECISION)
3.23 (SINGLE PRECISION)
PRODUCT OVERVIEW
The AD1954 is a complete 26-bit single-chip 3-channel digital
audio playback system with built-in DSP functionality for speaker
equalization, dual-band compression limiting, delay compensa-
tion, and image enhancement. These algorithms can be used to
compensate for real-world limitations of speakers, amplifiers,
and listening environments, resulting in a dramatic improvement
of perceived audio quality.
The signal processing used in the AD1954 is comparable to that
found in high-end studio equipment. Most of the processing is
done in full 48-bit double-precision mode, resulting in very good
low-level signal performance and the absence of limit cycles or
idle tones. The compressor/limiter uses a sophisticated two-band
algorithm often found in high-end broadcast compressors.
RAM
DATA FORMAT:
DSP CORE
26
22
ROM
™
Signal Processing DAC
Three-Channel, 24-Bit
DIGITAL OUT
AD1954
DAC – SW
DAC – L
DAC – R
(continued on page 9)
AD1954
ANALOG
OUTPUTS
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