Overview
The AD1940YSTZ is a SigmaDSP™ Multichannel 28-Bit Audio Processor produced by Analog Devices Inc. This single-chip audio processor is designed for advanced audio signal processing, including equalization, multiband dynamic processing, delay compensation, speaker compensation, and image enhancement. It is optimized for high-quality audio applications, offering performance comparable to that found in high-end studio equipment. The processor features a 28-bit DSP core with 56-bit double-precision processing, ensuring low-level signal performance and the absence of limit cycles or idle tones.
Key Specifications
| Parameter | Specification |
|---|---|
| Processor Type | 28-bit DSP (56-bit double precision) |
| Package Type | 48-Lead LQFP (7mm x 7mm) |
| Control Interface | 4-wire SPI |
| Input/Output Modes | I2S-compatible, left-justified, right-justified, TDM (8 or 16 channels) |
| Memory | 21 kB (6,144 words) data memory, 1024 location parameter RAM |
| Voltage Compatibility | 3.3 V and 5 V systems |
| Power Mode | Programmable low power mode |
| Sampling Frequency | Up to 192 kHz |
Key Features
- Hardware-accelerated DSP core for efficient audio processing
- Target/slew RAM for click-free volume control and dynamic parameter updates
- PLL for generating MCLK from various clock sources
- Flexible serial data port with multiple serial modes
- On-chip voltage regulator for compatibility with 3.3 V and 5 V systems
- Fast start-up and boot time from power-on or reset
- Safeload feature for transparent parameter updates without causing clicks on the output signals
- Eight independent data capture circuits for monitoring signal flow
- Extensive control port with read/write capability of all memory locations
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)
Q & A
- What is the primary function of the AD1940YSTZ?
The AD1940YSTZ is a SigmaDSP™ Multichannel 28-Bit Audio Processor designed for advanced audio signal processing. - What is the processor type and precision of the AD1940YSTZ?
The AD1940YSTZ features a 28-bit DSP core with 56-bit double precision processing. - What types of control interfaces are available for the AD1940 and AD1941?
The AD1940 is controlled by a 4-wire SPI port, while the AD1941 is controlled by a 2-wire I2C bus. - What are the input/output modes supported by the AD1940YSTZ?
The AD1940YSTZ supports I2S-compatible, left-justified, right-justified, and TDM (8 or 16 channels) input/output modes. - What is the purpose of the target/slew RAM in the AD1940YSTZ?
The target/slew RAM is used for click-free volume control and dynamic parameter updates. - How does the AD1940YSTZ handle power management?
The AD1940YSTZ has a programmable low power mode and an on-chip voltage regulator for compatibility with 3.3 V and 5 V systems. - What is the significance of the safeload feature in the AD1940YSTZ?
The safeload feature allows parameters to be transparently updated without causing clicks on the output signals. - What are some of the key applications of the AD1940YSTZ?
Key applications include automotive sound systems, digital televisions, home theater systems, multichannel audio systems, and more. - How does the AD1940YSTZ support monitoring of signal flow?
The AD1940YSTZ includes eight independent data capture circuits that can be programmed to tap the signal flow at any point in the DSP algorithm flow. - What is the package type of the AD1940YSTZ?
The AD1940YSTZ comes in a 48-Lead LQFP (7mm x 7mm) package.
