PCM1794ADB

Product Overview

Category: Digital-to-Analog Converter (DAC)

Use: The PCM1794ADB is a high-performance audio DAC designed for professional and consumer audio applications. It converts digital audio signals into analog signals with exceptional accuracy and fidelity.

Characteristics: - High-resolution audio playback - Low distortion and noise levels - Wide dynamic range - Support for various audio formats - Flexible interface options

Package: The PCM1794ADB is available in a small outline package (SOIC) with 28 pins.

Essence: The essence of the PCM1794ADB lies in its ability to faithfully reproduce digital audio signals with high precision, ensuring an immersive and accurate audio experience.

Packaging/Quantity: The PCM1794ADB is typically sold in reels or tubes containing multiple units, with quantities varying based on customer requirements.

Specifications

• Resolution: Up to 24-bit
• Sampling Rate: Up to 192 kHz
• Total Harmonic Distortion + Noise (THD+N): <0.001%
• Signal-to-Noise Ratio (SNR): >120 dB
• Dynamic Range (DNR): >120 dB
• Power Supply Voltage: 5 V
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The PCM1794ADB features the following pin configuration:

1. VCOM: Common Mode Voltage Output
2. AVDD: Analog Power Supply
3. DVDD: Digital Power Supply
4. AGND: Analog Ground
5. DGND: Digital Ground
6. IOUTL: Left Channel Current Output
7. IOUTR: Right Channel Current Output
8. VREF: Reference Voltage Output
9. BCK: Bit Clock Input
10. DATA: Serial Audio Data Input
11. LRCK: Left/Right Clock Input
12. MUTE: Mute Control Input
13. DEEMPH: De-emphasis Control Input
14. OSF0: Oversampling Filter Selection Bit 0
15. OSF1: Oversampling Filter Selection Bit 1
16. FLTR: Digital Filter Roll-Off Control
17. DEMP: De-emphasis Control
18. SCLK: Serial Clock Input
19. RESET: Reset Control Input
20. AVCC: Analog Power Supply
21. DVCC: Digital Power Supply
22. VCCA: Analog Power Supply
23. VCCD: Digital Power Supply
24. AGND: Analog Ground
25. DGND: Digital Ground
26. IOUTL: Left Channel Current Output
27. IOUTR: Right Channel Current Output
28. VREF: Reference Voltage Output

Functional Features

The PCM1794ADB offers the following functional features:

• High-resolution audio playback: Supports up to 24-bit resolution, allowing for accurate reproduction of intricate audio details.
• Low distortion and noise levels: Ensures minimal interference and a clean audio output.
• Wide dynamic range: Captures both subtle nuances and powerful sound elements with clarity.
• Support for various audio formats: Compatible with popular audio formats, including PCM, DSD, and DXD.
• Flexible interface options: Offers multiple input and output interfaces, enabling seamless integration into different audio systems.

Advantages and Disadvantages

Advantages: - Exceptional audio quality - Versatile compatibility with audio formats - Low distortion and noise levels - Wide dynamic range

Disadvantages: - Relatively higher cost compared to entry-level DACs - Requires careful design considerations for optimal performance

Working Principles

The PCM1794ADB utilizes advanced digital signal processing techniques to convert digital audio signals into analog form. It employs a multi-bit architecture with a delta-sigma modulator to achieve high-resolution audio playback. The digital audio data is processed, filtered, and converted into a continuous analog waveform, which is then amplified for output.

Detailed Application Field Plans

The PCM1794ADB finds applications in various fields, including:

1. Professional Audio Equipment: Used in studio monitors, mixing consoles, and audio interfaces to ensure accurate audio reproduction during recording, editing, and mastering processes.
2. High-End Consumer Audio Systems: Integrated into high-fidelity audio systems, such as amplifiers, preamplifiers, and digital music players, to deliver exceptional sound quality to audiophiles.
3. Home Theater Systems: Incorporated into AV receivers and surround sound processors to enhance the audio performance of home theater setups, providing immersive and realistic sound experiences.
4. Automotive Audio Systems: Integrated into car audio systems to deliver high-quality audio playback in vehicles, ensuring an enjoyable listening experience during commutes and road trips.

Detailed and Complete Alternative Models

1. PCM1792A: Similar to PCM1794ADB but with a lower dynamic range and slightly different pin configuration.
2. PCM179