The PCM2904/2906 is Texas Instruments single-chip USB stereo audio codec with USB-compliant full-speed protocol controller and S/PDIF (PCM2906 only). The USB protocol controller works with no software code, but the USB descriptors can be modified in some areas (for example, vendor ID/product ID). The PCM2904/2906 employs SpAct™ architecture, TI's unique system that recovers the audio clock from USB packet data. On-chip analog PLLs with SpAct enable playback and record with low clock jitter and with independent playback and record sampling rates.
(1)The descriptor can be modified by changing a mask.
SpAct is a trademark of Texas Instruments.
System Two, Audio Precision are trademarks of Audio Precision, Inc.
| Number of ADC channels | 2 |
| Number of DAC channels | 2 |
| Analog inputs | 2 |
| Sampling rate (max) (kHz) | 48 |
| Control interface | HID |
| Features | 500-mA max power configuration |
| Analog outputs | 2 |
| Rating | Catalog |
| Operating temperature range (°C) | -25 to 85 |
| SSOP (DB) | 28 | 79.56 mm² 10.2 x 7.8 |