PCM1794DBG4

Product Overview

Category: Digital-to-Analog Converter (DAC)

Use: The PCM1794DBG4 is a high-performance audio DAC designed for professional 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 PCM1794DBG4 comes in a small outline package (SOIC) with 28 pins.

Essence: This DAC is known for its ability to reproduce audio signals with utmost precision, delivering an immersive listening experience.

Packaging/Quantity: The PCM1794DBG4 is typically sold in reels of 250 units.

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 (DR): >120 dB
• Power Supply Voltage: 3.3 V or 5 V

Pin Configuration

The PCM1794DBG4 has 28 pins arranged as follows:

1. VCOM
2. AGND
3. DGND
4. AVCC
5. DVCC
6. IOUTL
7. IOUTR
8. VREF
9. BCK
10. DOUT
11. LRCK
12. MUTE
13. DEEMPH
14. OSF
15. SCLK
16. SDIN
17. RESET
18. MODE
19. DEM
20. AOUTL
21. AOUTR
22. FS
23. DEMP
24. DEMP
25. DEMP
26. DEMP
27. DEMP
28. DEMP

Functional Features

• High-resolution audio playback: The PCM1794DBG4 supports up to 24-bit resolution, ensuring accurate reproduction of even the most subtle audio details.
• Low distortion and noise levels: With a THD+N of less than 0.001%, this DAC minimizes unwanted artifacts and ensures pristine audio quality.
• Wide dynamic range: The PCM1794DBG4 offers a dynamic range of over 120 dB, allowing for faithful reproduction of both soft and loud passages in music.
• Flexible interface options: It supports various digital audio interfaces, including I2S, left-justified, right-justified, and TDM modes.

Advantages and Disadvantages

Advantages: - Exceptional audio quality - High-resolution playback capability - Low distortion and noise levels - Wide dynamic range - Versatile interface options

Disadvantages: - Relatively high cost compared to lower-end DACs - Requires careful design considerations for optimal performance

Working Principles

The PCM1794DBG4 utilizes advanced digital signal processing techniques to convert digital audio signals into analog form. It employs a multi-bit architecture with oversampling and delta-sigma modulation to achieve high accuracy and fidelity.

The incoming digital audio data is processed through a series of filters and converters, resulting in a continuous analog waveform that accurately represents the original audio signal. This analog output can then be amplified and sent to speakers or headphones for playback.

Detailed Application Field Plans

The PCM1794DBG4 is widely used in professional audio equipment, including:

1. Studio monitors
2. Digital mixing consoles
3. High-end audio amplifiers
4. Audio interfaces
5. Home theater systems

Its exceptional audio quality and versatile interface options make it suitable for demanding applications where accurate audio reproduction is critical.

Detailed and Complete Alternative Models

1. PCM1792A: Similar to the PCM1794DBG4, this DAC offers high-resolution audio playback and low distortion levels.
2. PCM1796: A lower-cost alternative with slightly reduced specifications but still capable of delivering excellent audio performance.
3. PCM1798: This DAC provides similar features to the PCM1794DBG4 but in a different package and pin configuration.

These alternative models offer varying trade-offs in terms of cost, performance, and package options, allowing designers to choose the most suitable option for their specific requirements.

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