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Features
- 16-channel digital audio processor
- Accepts sample rates up to 192 kHz
- 28-bit × 28-bit multiplier with full 56-bit accumulator
- Fully programmable program RAM for custom program download
- Parameter RAM allows complete control of 1,024 parameters
- Control port features safeload for transparent parameter updates and complete mode and memory transfer control
- Target/slew RAM for click-free volume control and dynamic parameter updates
- See data sheet for additional features
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The AD1940 / AD1941 are a complete 28-bit, single-chip, multi-channel audio SigmaDSP™ for equalization, multiband dynamic processing, delay compensation, speaker compensation, and image enhancement. These algorithms can be used to compen-sate 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 / AD1941 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.
The AD1940 / AD1941 are a fully programmable DSP. Easy to use software allows the user to graphically configure a custom signal processing flow using blocks such as biquad filters, dynamics processors, 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 AD1940 / AD1941’s digital input and output ports allow a glueless connection to ADCs and DACs by multiple, 2-channel serial data streams or TDM data streams. When in TDM mode, the AD1940 / AD1941 can input 8 or 16 channels of serial data, and can output 8 or 16 channels of serial data. The input and output port configurations can be individually set. The AD1940 is controlled by a 4-wire SPI® port; the AD1941 is controlled by a 2-wire I2C® bus. Other than the control interface, the functions of the two parts are identical.
APPLICATIONS
- Automotive sound systems
- Digital televisions
- Home theater systems (Dolby digital/DTS postprocessor)
- Multichannel audio systems
- Mini-component stereos
- Multimedia audio
- Digital speaker crossover
- Musical instruments
- In-seat sound systems (aircrafts/motor coaches)
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AD1940
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AD1940/AD1941: SigmaDSP Multichannel 28-Bit Audio Processor Data Sheet (Rev.B)
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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD1940YSTZ |
48-Lead LQFP (7mm x 7mm)
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| AD1940YSTZRL |
48-Lead LQFP (7mm x 7mm)
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- AD1940YSTZ
- Pin/Package Drawing
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48-Lead LQFP (7mm x 7mm)
- Documentation
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HTML
Material Declaration
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HTML
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- CAD Symbols, Footprints, and 3D Models
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Ultra Librarian
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SamacSys
- AD1940YSTZRL
- Pin/Package Drawing
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48-Lead LQFP (7mm x 7mm)
- Documentation
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HTML
Material Declaration
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HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
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Ultra Librarian
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SamacSys
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Part Models
Product Lifecycle
PCN
Dec 7, 2016
- 16_0033
Assembly Relocation to Stats ChipPAC Jiangyin and Test Transfer to Stats ChipPAC Singapore of Select QFP Products
AD1940YSTZ
PRODUCTION
AD1940YSTZRL
PRODUCTION
Jan 5, 2009
- 07_0077
Certification of STATSChipPAC Shanghai, China and AMKOR Philippines as additional sources for Assembly & Test of QFP Packages
AD1940YSTZ
PRODUCTION
AD1940YSTZRL
PRODUCTION
Filter by Model
Part Models
Product Lifecycle
PCN
Dec 7, 2016
- 16_0033
Assembly Relocation to Stats ChipPAC Jiangyin and Test Transfer to Stats ChipPAC Singapore of Select QFP Products
AD1940YSTZ
PRODUCTION
AD1940YSTZRL
PRODUCTION
Jan 5, 2009
- 07_0077
Certification of STATSChipPAC Shanghai, China and AMKOR Philippines as additional sources for Assembly & Test of QFP Packages
AD1940YSTZ
PRODUCTION
AD1940YSTZRL
PRODUCTION
Software & Part Ecosystem
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Software Development Tools
SigmaStudio®
Looking for Evaluation Software? You can find it here
Evaluation Kits 2
EVAL-ADUSB2EBZ
ADUSB2EBZ Evaluation Board
Product Detail
The Analog Devices USBi “USB Interface” (EVAL-ADUSB2EBZ) board is the interface between your PC's USB port and SigmaDSP hardware's data input pins. This interface can be used with any evaluation board which includes an External SPI/I²C header (Aardvark Header). The EVAL-ADUSB2EBZ board is capable of both SPI and I²C communication (which is user selectable) and can supply IOVDD of either 3.3V or 1.8V.The USBi interface is powered from the computer's USB port.
To Install the USBi Board:
- Connect the USB cable to the USBi Board a spare USB port on your PC.
- The Windows “Found New Hardware Wizard” will launch.
- Choose “Install from a list or a specific location” and click “Next”.
- Select “Search for the best driver in these locations” and Check the box for “Include this location in the search.”
- Press the “Browse” button and locate the appropriate driver file in the SigmaStudio application folder (default folder is C:\Program Files\Analog Devices Inc\Sigma Studio\USB drivers): Select the CyUSB.inf file.
- Click “Continue Anyway” if you're prompted with “This software has not passed Windows Logo testing.”
Using USBi in SigmaStudio:
To communication between SigmaStudio and the USBi board, a communication channel block must be added to the Schematic design. To locate the block, select the Hardware Configuration Tab, in the ToolBox or Tree ToolBox window choose the “Communication Channels” category, and select the USBi block.
This block provides connections for multiple processors (ICs / DSPs), allowing you to use multiple processors in a single design. This block allows you to explicitly specify both the communication protocol (SPI or I²C) and the part's address, I²C address or SPI catch line. The DSP hardware's address must match the block's selected address for communication to function properly. See the parts data sheet for more information about addressing (e.g. ADR_SEL, ADDR0, or ADDR1 pins). The default USBi protocol is I²C, to enable SPI, you must first select an SPI address in the block's drop down menu and then perform three write operations (e.g. press the write button the Register Read/Write Window 3 times). The USBi hardware has LEDs which indicate the current mode, I²C or SPI.
EVAL-AD1940
AD1940 Evaluation Board
Features and Benefits
| EVAL-AD1940AZ |
EVAL-AD140MINIBZ |
Product Detail
Small AD1940 SigmaDSP evaluation board with AD1938 Codec and buffered analog inputs and outputs. 6 V power supply and USBi are included in the package. This is the recommended evaluation board for the AD1940. The EVAL-AD1940AZ can be used if this board lacks some necessary functionality or interface.
Tools & Simulations 1
SigmaDSP Processors: Software and Tools
