AD1954: SigmaDSPTM Digital Audio Processor with On-Board Converters
The AD1954 is a complete, 26-bit, single-chip, 3-channel digital audio playback system with built-in DSP functionality. Key features include: 3 channels of digital audio; a 7-band, 48-bit stereo equalizer; delays for loudspeaker location adjustment; Phat StereoTM spatial enhancement; and a dual-band, professional-quality dynamic processor. Its three DACs achieve 112 dB signal-to-noise ratio (SNR) at 48 kHz. Its dynamic processing features include:
- Fine-tuned bass boost to enhance low frequencies for small loudspeakers
- Algorithms that virtually increase loudness by removing distortion at high volumes
- Midnight mode which automatically reduces loudness in high-volume instances (e.g., sudden loud scenes on DVDs)
- Low-level expansion to lift low-volume signals above road noise (for car stereos)
Pricing and Availability:
The AD1954 SigmaDSP Digital Audio Processor is available in either a 44-pin MQFP or a 48-pin TQFP package and is rated for the extended -40°C to +105°C temperature range. The AD1954 is in Production, and Samples are available. Prices begin at $5.88 in 10,000-piece quantities.
产品应用领域 Applications
- 2.0/2.1 Channel Audio Systems (Two Main Channels plus Subwoofer)
- Multimedia Audio
- Automotive Sound Systems
- Minicomponent Stereo
- Home Theater Systems (AC-3 Postprocessor)
- Musical Instruments
- In-Seat Sound Systems (Aircraft, Motor Coaches)
AD1954 特点
- 5 V 3-Channel Audio DAC System
- Accepts Sample Rates up to 48 kHz
- 7 Biquad Filter Sections per Channel
- Dual Dynamic Processor with Arbitrary Input/Output Curve and Adjustable Time Constants
- 0 ms to 6 ms Variable Delay/Channel for Speaker Alignment
- Stereo Spreading Algorithm for Phat StereoTM Effect
- Differential Output for Optimum Performance
- See data sheet for additional features
AD1954 功能框图
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| AD1954YST | 量产 | 48 ld LQFP | 48 | 汽车级 |
| AD1954YSTRL | 量产 | 48 ld LQFP | 48 | 汽车级 |
| AD1954YSTZ | 量产 | 48 ld LQFP | 48 | 汽车级 |
| AD1954YSTZRL | 量产 | 48 ld LQFP | 48 | 汽车级 |
| AD1954YSZ | 量产 | 44 ld MQFP (13.20mm wide) | 44 | 汽车级 |