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PCM1794ADBR
Product Overview
Category: Digital-to-Analog Converter (DAC)
Use: The PCM1794ADBR is a high-performance stereo 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 PCM1794ADBR comes in a small outline package (SOIC) with 28 pins.
Essence: The essence of the PCM1794ADBR lies in its ability to accurately convert digital audio signals into high-quality analog signals, ensuring faithful reproduction of the original audio content.
Packaging/Quantity: The PCM1794ADBR is typically sold in reels or tubes, with a quantity of 250 units per reel/tube.
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: 5 V
- Operating Temperature Range: -40°C to +85°C
Detailed Pin Configuration
The PCM1794ADBR has a total of 28 pins, each serving a specific function. Here is a detailed pin configuration:
- VCOM: Common Mode Voltage Output
- AGND: Analog Ground
- DGND: Digital Ground
- AVCC: Analog Power Supply
- DVCC: Digital Power Supply
- IOUTL: Left Channel Current Output
- IOUTR: Right Channel Current Output
- VREFP: Positive Reference Voltage Input
- VREFN: Negative Reference Voltage Input
- BCK: Bit Clock Input
- DOUT: Serial Audio Data Input
- LRCK: Left/Right Clock Input
- MUTE: Mute Control Input
- DEEMPH: De-emphasis Control Input
- OSF0: Oversampling Filter Selection Bit 0
- OSF1: Oversampling Filter Selection Bit 1
- FLTR: Digital Filter Roll-Off Control Input
- AOUTL: Left Channel Analog Output
- AOUTR: Right Channel Analog Output
- NC: No Connection
- NC: No Connection
- NC: No Connection
- NC: No Connection
- NC: No Connection
- NC: No Connection
- NC: No Connection
- NC: No Connection
- NC: No Connection
Functional Features
- High-resolution audio playback: The PCM1794ADBR supports up to 24-bit resolution, allowing for the faithful reproduction of intricate audio details.
- Low distortion and noise levels: With a THD+N of less than 0.001% and an SNR and DR exceeding 120 dB, the PCM1794ADBR ensures minimal distortion and noise interference.
- Flexible interface options: The DAC offers various input options, including serial audio data input and left/right clock input, making it compatible with different audio systems.
- Support for various audio formats: The PCM1794ADBR can handle a wide range of audio formats, including PCM, DSD, and DXD, providing versatility in audio playback.
Advantages and Disadvantages
Advantages: - High-resolution audio playback capability - Low distortion and noise levels - Wide dynamic range - Versatile interface options - Support for various audio formats
Disadvantages: - Relatively high power consumption - Requires external components for complete audio system integration
Working Principles
The PCM1794ADBR operates on the principle of converting digital audio signals into analog signals using a combination of oversampling, filtering, and current output. It utilizes advanced digital signal processing techniques to ensure accurate reconstruction of the original audio waveform.
Detailed Application Field Plans
The PCM1794ADBR finds applications in various professional audio systems, including: - High-end audio equipment - Studio recording and mixing consoles - Broadcast and production equipment - Musical instruments and synthesizers - Home theater systems
Detailed and Complete Alternative Models
- PCM1792A: Similar performance and features, but with a different pin configuration.
- PCM1796: Higher resolution (32-bit) DAC with similar characteristics.
- PCM1798: Lower resolution (20-bit) DAC with similar characteristics.
These alternative models offer different specifications and pin configurations, allowing users to choose the most suitable option based on their specific requirements.
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Wymień 10 typowych pytań i odpowiedzi związanych z zastosowaniem PCM1794ADBR w rozwiązaniach technicznych
Sure! Here are 10 common questions and answers related to the application of PCM1794ADBR in technical solutions:
Q: What is PCM1794ADBR? A: PCM1794ADBR is a high-performance stereo digital-to-analog converter (DAC) chip manufactured by Texas Instruments.
Q: What are the key features of PCM1794ADBR? A: The key features of PCM1794ADBR include 24-bit resolution, support for sampling rates up to 192kHz, low total harmonic distortion, and a dynamic range of 132dB.
Q: What applications can PCM1794ADBR be used for? A: PCM1794ADBR is commonly used in audio equipment such as high-end audio systems, professional audio interfaces, digital mixing consoles, and home theater receivers.
Q: How does PCM1794ADBR connect to other components in an audio system? A: PCM1794ADBR typically connects to a microcontroller or digital signal processor (DSP) through an I2S or SPI interface. The analog output of the DAC is then connected to an amplifier or directly to speakers.
Q: Can PCM1794ADBR handle different audio formats? A: Yes, PCM1794ADBR supports various audio formats including PCM, DSD, and DoP (DSD over PCM).
Q: Does PCM1794ADBR require external components for operation? A: Yes, PCM1794ADBR requires external components such as decoupling capacitors, voltage regulators, and passive components for proper operation.
Q: What power supply requirements does PCM1794ADBR have? A: PCM1794ADBR operates on a single power supply voltage ranging from 3.3V to 5V.
Q: Can PCM1794ADBR be used in a multi-channel audio system? A: Yes, multiple PCM1794ADBR chips can be used in parallel to achieve multi-channel audio playback.
Q: Are there any evaluation boards or development kits available for PCM1794ADBR? A: Yes, Texas Instruments provides evaluation boards and development kits that include PCM1794ADBR for easy prototyping and testing.
Q: Where can I find more technical information about PCM1794ADBR? A: You can refer to the datasheet and application notes provided by Texas Instruments for detailed technical information about PCM1794ADBR.