PCM1781DBQR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Digital-to-Analog Converter (DAC)
• Characteristics: High-performance, low-power consumption
• Package: DBQ (SSOP-16)
• Essence: Converts digital audio signals into analog audio signals
• Packaging/Quantity: Tape and Reel, 2500 units per reel

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): >100 dB
• Power Supply Voltage: 3.3 V
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The PCM1781DBQR has a total of 16 pins arranged as follows:

1. VCOM: Common voltage reference for the DAC
2. AVDD: Analog power supply voltage
3. AGND: Analog ground
4. DVDD: Digital power supply voltage
5. DGND: Digital ground
6. SDIN: Serial data input
7. SCLK: Serial clock input
8. LRCK: Left/right channel select input
9. MUTE: Mute control input
10. BICK: Bit clock input
11. SDOUT: Serial data output
12. VOUTL: Left channel analog output
13. VOUTR: Right channel analog output
14. VREF: Reference voltage output
15. VCOM: Common voltage reference for the DAC
16. NC: No connection

Functional Features

• High-resolution audio conversion with up to 24-bit resolution
• Supports sampling rates up to 192 kHz for accurate reproduction of high-frequency audio
• Low total harmonic distortion and noise for clear and faithful sound reproduction
• Wide dynamic range and high signal-to-noise ratio for excellent audio quality
• Low power consumption for energy-efficient operation
• Mute control feature for convenient audio playback control

Advantages and Disadvantages

Advantages: - High-performance audio conversion - Wide range of supported sampling rates - Low distortion and noise levels - Energy-efficient operation

Disadvantages: - Limited pin configuration options - Requires external components for complete audio system integration

Working Principles

The PCM1781DBQR is a digital-to-analog converter that operates by converting digital audio signals into analog audio signals. It utilizes advanced circuitry to accurately reproduce the original audio waveform with high fidelity. The DAC receives digital audio data through the serial data input (SDIN) pin, synchronized by the serial clock input (SCLK) and left/right channel select input (LRCK). It then converts this digital data into analog voltage outputs (VOUTL and VOUTR) corresponding to the left and right audio channels.

Detailed Application Field Plans

The PCM1781DBQR is commonly used in various audio applications, including:

1. Consumer Electronics: Hi-Fi audio systems, home theaters, soundbars, and portable media players.
2. Automotive: Car audio systems, infotainment systems, and head units.
3. Professional Audio: Studio monitors, mixing consoles, and audio interfaces.
4. Telecommunications: VoIP phones, conference systems, and audio conferencing equipment.

Detailed and Complete Alternative Models

1. PCM1794A: Higher-resolution DAC with 32-bit capability and improved dynamic range.
2. PCM5102A: Low-power DAC with integrated headphone amplifier for portable audio devices.
3. PCM1865: Multi-channel audio ADC with simultaneous sampling capability.

These alternative models offer different features and specifications to cater to specific application requirements.

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