Analog Devices AD1940 Evaluation Board EVAL-AD1940MINIBZ EVAL-AD1940MINIBZ データシート
製品コード
EVAL-AD1940MINIBZ
SigmaDSP™ Evaluation Board
Preliminary Technical Data
EVAL-AD1940MINIB
Rev. PrA
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responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
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EVALUATION BOARD OVERVIEW
This evaluation board provides a simple analog input and
output setup for the AD1940. The DSP is controlled by Analog
Devices’ SigmaStudio
output setup for the AD1940. The DSP is controlled by Analog
Devices’ SigmaStudio
TM
software, which interfaces to the board
via a USB connection. This evaluation board may be powered
either over the USB bus or by a single +6V supply, which is
regulated to the voltages required on the board. The PC board
is a 3” × 3” four-layer design, with a single ground plane and a
single power plane on the inner layers. The AD1938 codec
handles all signal conversion between the analog and digital
domains.
either over the USB bus or by a single +6V supply, which is
regulated to the voltages required on the board. The PC board
is a 3” × 3” four-layer design, with a single ground plane and a
single power plane on the inner layers. The AD1938 codec
handles all signal conversion between the analog and digital
domains.
PACKAGE CONTENTS
The EVAL-AD1940MINIB package contains these items:
• EVAL-AD1940MINIB evaluation board
• EVAL-ADUSB1 USB adapter
• SigmaStudio software CD
• Universal power supply
• USB Cable
• Evaluation board/software quick-start guide
Figure 1. Evaluation Board Block Diagram
AD1940 OVERVIEW
The AD1940 is a complete 28/56-bit, single-chip, multichannel
audio DSP in the SigmaDSP family of parts. Processing
includes equalization, crossover, bass enhancement, multiband
dynamics processing, delay compensation, speaker
compensation, and stereo image widening. These algorithms
can be used to compensate for the real-world limitations of
speakers, amplifiers, and listening environments, resulting in a
dramatic improvement of perceived audio quality.
audio DSP in the SigmaDSP family of parts. Processing
includes equalization, crossover, bass enhancement, multiband
dynamics processing, delay compensation, speaker
compensation, and stereo image widening. These algorithms
can be used to compensate for the real-world limitations of
speakers, amplifiers, and listening environments, resulting in a
dramatic improvement of perceived audio quality.
The signal processing used in the AD1940 is comparable to that
found in high-end studio equipment. Most of the processing is
done in full 56-bit double-precision mode, resulting in very
good low-level signal performance and the absence of limit
cycles or idle tones. The dynamics processor uses a
sophisticated, multiple-breakpoint algorithm often found in
high-end broadcast compressors.
found in high-end studio equipment. Most of the processing is
done in full 56-bit double-precision mode, resulting in very
good low-level signal performance and the absence of limit
cycles or idle tones. The dynamics processor uses a
sophisticated, multiple-breakpoint algorithm often found in
high-end broadcast compressors.
The AD1940 is a fully programmable DSP. The easy-to-use
SigmaStudio software allows the user to graphically configure a
custom signal processing flow, using blocks such as biquad
filters, dynamics processors, level controls, and surround sound
processors. An extensive control port allows click-free
parameter updates, along with readback capability from any
point in the algorithm flow.
SigmaStudio software allows the user to graphically configure a
custom signal processing flow, using blocks such as biquad
filters, dynamics processors, level controls, and surround sound
processors. An extensive control port allows click-free
parameter updates, along with readback capability from any
point in the algorithm flow.
The EVAL-AD1940MINIB’s onboard AD1938 Codec handles
all A/D and D/A conversion. One stereo analog input and three
stereo analog outputs are provided on the board, along with
appropriate filters.
all A/D and D/A conversion. One stereo analog input and three
stereo analog outputs are provided on the board, along with
appropriate filters.