AD1941
ObsoleteSigmaDSP® Multichannel 28-Bit Audio Processor
Overview
- 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
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 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/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, dyna-mics 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
- Multichannel audio systems
- Mini-component stereos
- Multimedia audio
- Digital speaker crossover
- Musical instruments
- In-seat sound systems (aircrafts/motor coaches)
Suggested Replacement Parts
SigmaDSP® Multichannel 28-Bit Audio Processor
Documentation
Data Sheet 1
Application Note 1
Frequently Asked Question 1
Device Drivers 1
This is the most up-to-date revision of the Data Sheet.
Software Resources
Device Drivers 1
SigmaStudio®
Graphical development tool for programming, development, and tuning software for ADI DSP audio processors and A2B® transceivers.
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Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Analog to Digital Converters (ADCs) 1 | ||
| ADMP441 | Obsolete | Omnidirectional Microphone with Bottom Port and I2S Digital Output |
| Digital to Analog Converters (DACs) 1 | ||
| ADAU1966 | NOT RECOMMENDED FOR NEW DESIGNS | 16-Channel 118 dB SNR Differential Output, 192 kHz, 24-Bit DAC |
Tools & Simulations
SigmaDSP Processors: Software and Tools
Open Tool
Evaluation Kits
AD1940 Evaluation Board