Overview
The PCM1704U/2K, produced by Texas Instruments, is a precision 24-bit digital-to-analog converter (DAC) known for its exceptionally high dynamic performance. This device is ideal for high-end consumer and professional audio applications due to its ultra-low distortion and excellent low-level signal performance. The PCM1704U/2K incorporates a BiCMOS sign-magnitude architecture, which eliminates glitches and other nonlinearities around bipolar zero, ensuring highly accurate and linear output.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Resolution | 24 | Bits | |||
| Data Format | 20-, 24-Bit, MSB-First | ||||
| Sampling Frequency (fS) | 16 | 96 | kHz | ||
| Input Clock Frequency | 25 | MHz | |||
| THD+N (VO = 0dB) | PCM1704U-K | 0.0008 | 0.0015 | % | |
| Dynamic Range (EIAJ, A-weighted) | PCM1704U-K | 106 | 112 | dB | |
| Signal-to-Noise Ratio (EIAJ, A-weighted) | 112 | 120 | dB | ||
| Power Supply | ±5V | V | |||
| Package Type | 20-SOIC |
Key Features
- High Dynamic Performance: The PCM1704U/2K offers exceptional dynamic range and signal-to-noise ratio, making it suitable for high-end audio applications.
- BiCMOS Sign-Magnitude Architecture: This architecture eliminates glitches and nonlinearities around bipolar zero, ensuring highly linear output.
- Low Distortion: Ultra-low distortion and noise levels, with THD+N as low as 0.0008% for the K grade.
- Fast Current Output: Capable of ±1.2mA/200ns current output.
- Glitch-Free Output: Ensures smooth and accurate signal conversion without glitches.
- Pin-Programmable Data Inversion: Allows for flexible data format control.
- Small 20-Lead SO Package: Compact packaging suitable for various applications.
Applications
- High-End Consumer Audio: Ideal for high-fidelity audio systems, home theaters, and audiophile equipment.
- Professional Audio: Suitable for professional audio equipment, recording studios, and live sound systems.
- Waveform Synthesis: Used in applications requiring very low distortion and noise, such as waveform synthesis and test equipment.
- Test and Measurement Systems: Important in systems where DC parameters like gain error, bipolar zero offset, and temperature drift are critical.
Q & A
- What is the resolution of the PCM1704U/2K?
The PCM1704U/2K has a resolution of 24 bits.
- What is the typical dynamic range of the PCM1704U-K?
The typical dynamic range for the PCM1704U-K is 112 dB (EIAJ, A-weighted).
- What is the maximum input clock frequency for the PCM1704U/2K?
The maximum input clock frequency is 25 MHz.
- What type of architecture does the PCM1704U/2K use?
The PCM1704U/2K uses a BiCMOS sign-magnitude architecture.
- What is the power supply requirement for the PCM1704U/2K?
The power supply requirement is ±5V.
- What is the package type of the PCM1704U/2K?
The package type is 20-SOIC.
- Does the PCM1704U/2K support data inversion?
Yes, the PCM1704U/2K supports pin-programmable data inversion.
- What are the typical THD+N values for the PCM1704U-K?
The typical THD+N values for the PCM1704U-K are 0.0008% to 0.0015% at 0dB output.
- Can the PCM1704U/2K be used in waveform synthesis applications?
Yes, it is well-suited for waveform synthesis applications requiring very low distortion and noise.
- What is the significance of the sign-magnitude architecture in the PCM1704U/2K?
The sign-magnitude architecture eliminates glitches and nonlinearities around bipolar zero, providing highly linear output and avoiding large linearity errors.
