AD1954
PRODUCTIONSigmaDSP® Digital Audio Processor with On-Board Converters
- Part Models
- 3
- 1ku List Price
- Starting From $10.38
Part Details
- 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
- Differential Output for Optimum Performance
- 0 ms to 6 ms Variable Delay/Channel for Speaker Alignment
- Stereo Spreading Algorithm for Phat Stereo™ Effect
- See data sheet for additional features
The AD1954 is a complete 26-bit single-chip 3-channel digital audio playback system with built-in DSP functionality for speaker equalization, dual-band compression/limiting, delay compensation, and image enhancement. These algorithms can be used to compensate for real-world limitations of speakers, amplifiers, and listening environments, resulting in a dramatic improvement of perceived audio quality.
The signal processing used in the AD1954 is comparable to that found in high-end studio equipment. Most of the processing is done in full 48-bit double-precision mode, resulting in very good low-level signal performance and the absence of limit cycles or idle tones. The compressor/limiter uses a sophisticated two-band algorithm often found in high-end broadcast compressors.
An extensive SPI port allows click-free parameter updates, along with read-back capability from any point in the algorithm flow.
The AD1954 includes ADI’s patented multibit sigma-delta DAC architecture. This architecture provides 112 dB SNR and dynamic range and THD+N of –100 dB. These specifications allow the AD1954 to be used in applications ranging from low-end boom boxes to high-end professional mixing/editing systems.
The AD1954 also has a digital output that allows it to be used purely as a DSP. This digital output can also be used to drive an external DAC to extend the number of channels beyond the three that are provided on the chip.
This chip can be used with either its default signal processing program or with a custom user-designed program. Graphical programming tools are available from ADI for custom programming.
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)
Documentation
Data Sheet 1
Application Note 2
Frequently Asked Question 1
Device Drivers 1
Analog Dialogue 1
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 |
|---|---|---|---|
| AD1954YSTZ | 48-Lead LQFP (7mm x 7mm) | ||
| AD1954YSTZRL | 48-Lead LQFP (7mm x 7mm) | ||
| AD1954YSZ | 44-Lead MQFP (13.2mm x 10mm) |
| 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 |
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| AD1954YSTZ | PRODUCTION | |
| AD1954YSTZRL | PRODUCTION | |
| AD1954YSZ | PRODUCTION | |
|
Jan 5, 2009 - 07_0077 Certification of STATSChipPAC Shanghai, China and AMKOR Philippines as additional sources for Assembly & Test of QFP Packages |
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| AD1954YSTZ | PRODUCTION | |
| AD1954YSTZRL | PRODUCTION | |
| AD1954YSZ | PRODUCTION | |
|
Aug 19, 2009 - 07_0024 Package Material Changes for SOT23, MiniSO, MQFP, PDIP, PLCC, SOIC (narrow and wide body), SSOP, TSSOP and TSSOP exposed pad |
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| AD1954YSZ | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.