PCM1804DBR

Product Overview

Category: Integrated Circuit (IC)

Use: Analog-to-Digital Converter (ADC)

Characteristics: - High-performance stereo audio ADC - Low power consumption - Wide dynamic range - High signal-to-noise ratio - Small package size - Easy to integrate into various audio systems

Package: SSOP-20

Essence: The PCM1804DBR is a high-quality audio ADC designed for converting analog audio signals into digital format.

Packaging/Quantity: The PCM1804DBR is typically sold in reels of 2500 units.

Specifications

• Resolution: 24-bit
• Sampling Rate: Up to 96 kHz
• Total Harmonic Distortion + Noise (THD+N): 0.0005%
• Signal-to-Noise Ratio (SNR): 105 dB
• Dynamic Range (DR): 105 dB
• Power Supply Voltage: 3.3 V
• Power Consumption: 7.5 mW (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The PCM1804DBR has a total of 20 pins, which are assigned specific functions as follows:

1. AGND: Analog Ground
2. VINL: Left Channel Analog Input
3. VINR: Right Channel Analog Input
4. VREF: Reference Voltage Input
5. VCC: Power Supply Voltage Input
6. DVDD: Digital Power Supply Voltage Input
7. BICK: Bit Clock Input
8. LRCK: Word Clock Input
9. DIN: Serial Data Input
10. MCLK: Master Clock Input
11. DGND: Digital Ground
12. DOUT: Serial Data Output
13. NC: No Connection
14. NC: No Connection
15. NC: No Connection
16. NC: No Connection
17. NC: No Connection
18. NC: No Connection
19. NC: No Connection
20. NC: No Connection

Functional Features

• High-resolution audio conversion
• Low power consumption for energy efficiency
• Wide dynamic range and low distortion for accurate sound reproduction
• Flexible clocking options for compatibility with various systems
• Serial data interface for easy integration with digital audio processors

Advantages and Disadvantages

Advantages: - High-quality audio conversion - Low power consumption - Small package size for space-constrained designs - Wide operating temperature range - Easy integration into audio systems

Disadvantages: - Limited sampling rate compared to some higher-end ADCs - No built-in digital audio processing features

Working Principles

The PCM1804DBR utilizes a delta-sigma modulation technique to convert analog audio signals into digital format. It employs oversampling and noise shaping to achieve high resolution and low distortion. The input analog signal is sampled at a high frequency, and the resulting digital output is then filtered and decimated to obtain the desired resolution and sampling rate.

Detailed Application Field Plans

The PCM1804DBR is commonly used in various audio applications, including: - Professional audio recording equipment - Consumer audio devices (e.g., portable music players, soundbars) - Automotive audio systems - Home theater systems - Musical instruments

Alternative Models

Some alternative models that offer similar functionality to the PCM1804DBR include: - PCM1802DBR: Similar specifications but with a lower sampling rate of up to 48 kHz. - PCM1808PWR: Higher sampling rate of up to 192 kHz but with a larger package size (TSSOP-28). - AK5572EN: Comparable performance with additional digital audio processing features.

In conclusion, the PCM1804DBR is a high-performance audio ADC that offers excellent sound quality, low power consumption, and easy integration into various audio systems. Its small package size makes it suitable for space-constrained designs, while its wide dynamic range ensures accurate sound reproduction. Although it has some limitations in terms of sampling rate and lack of built-in digital audio processing, it remains a popular choice for professional and consumer audio applications.