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.
Feature
- PCM2904: Without S/PDIF
- PCM2906: With S/PDIF
- On-Chip USB Interface:
- With Full-Speed Transceivers
- Fully Compliant With USB 1.1 Specification
- Certified by USB-IF
- Partially Programmable Descriptors(1)
- USB Adaptive Mode for Playback
- USB Asynchronous Mode for Record
- Bus Powered
- 16-Bit Delta-Sigma ADC and DAC
- Sampling Rate:
- DAC: 32, 44.1, 48 kHz
- ADC: 8, 11.025, 16, 22.05, 32, 44.1, 48 kHz
- On-Chip Clock Generator With Single 12-MHz Clock Source
- Single Power Supply: 5 V Typical (VBUS)
- Stereo ADC
- Analog Performance at VBUS = 5 V
- THD+N = 0.01%
- SNR = 89 dB
- Dynamic Range = 89 dB
- Decimation Digital Filter
- Pass-Band Ripple = ±0.05 dB
- Stop-Band Attenuation = -65 dB
- Single-Ended Voltage Input
- Antialiasing Filter Included
- Digital LCF Included
- Analog Performance at VBUS = 5 V
- Stereo DAC:
- Analog Performance at VBUS = 5 V
- THD+N = 0.005%
- SNR = 96 dB
- Dynamic Range = 93 dB
- Oversampling Digital Filter
- Pass-Band Ripple = ±0.1 dB
- Stop-Band Attenuation = -43 dB
- Single-Ended Voltage Output
- Analog LPF Included
- Analog Performance at VBUS = 5 V
- Multifunctions:
- Human Interface Device (HID) Volume ± Control and Mute Control
- Suspend Flag
- Package: 28-Pin SSOP
- APPLICATIONS
- USB Audio Speaker
- USB Headset
- USB Monitor
- USB Audio Interface Box
