Product Overview
The PCM1770RGAR from TI is a 24-bit stereo audio DAC with integrated headphone amplifier, achieving 100 dB dynamic range and -85 dB THD+N. It supports up to 48 kHz sample rate via I2S interface and is designed for portable audio devices and consumer electronics.
Key Specifications
| Function | 24-bit stereo audio DAC with headphone amp |
| Resolution | 24-bit |
| Dynamic Range | 100 dB |
| THD+N | -85 dB |
| Sample Rate | Up to 48 kHz |
| Interface | I2S |
| Package | VQFN-32 (5x5mm) |
Working Principle
Multi-bit delta-sigma DAC with 24-bit input resolution converts I2S digital audio to analog. Internal analog volume control and headphone amplifier drive 16-32 ohm loads directly. PLL-based clock generation supports multiple sample rates from a single master clock. De-emphasis filters for CD audio standard.
Applications
- Portable audio player
- USB headset / headphone
- Tablet / smartphone audio
- Set-top box analog output