AD1940 SigmaDSP® Multichannel 28-Bit Audio Processor
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, 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)
Features and Benefits- 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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Data Sheets
Application Notes
User Guides
Frequently Asked Questions
Order Information
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|
| AD1940YSTZ Production | 48 ld LQFP | OTH 250 | -40 to 105C | 6.93 | 5.55 | Y |
| AD1940YSTZRL Production | 48 ld LQFP | REEL 2000 | -40 to 105C | 0 | 5.55 | Y |
Evaluation Boards
| Part Number | Description | Price | RoHS |
|---|
| EVAL-AD1940AZ | Evaluation Board | 399 | Y |
| EVAL-AD1940MINIBZ | Evaluation Board | 199 | Y |
| EVAL-ADUSB2EBZ | USB Interface | 80 | Y |
