| Number of ADC channels | 2 |
| Number of DAC channels (#) | 2 |
| Analog inputs | 2 |
| Sampling rate (Max) (kHz) | 48 |
| Control interface | HID |
| Features | USB interface |
| Analog outputs | 2 |
- PCM2901: Without S/PDIF
- PCM2903: 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
- Self-Powered
- 16-Bit Delta-Sigma ADC and DAC
- Sampling Rates
- 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: 3.3 V Typical
- Stereo ADC
- Analog Performance at VCCC = VCCP1 = VCCP2 = VCCX = VDD = 3.3 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 VCCC = VCCP1 = VCCP2 = VCCX = VDD = 3.3 V
- Stereo DAC
- Analog Performance at VCCC = VCCP1 = VCCP2 = VCCX = VDD = 3.3 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 VCCC = VCCP1 = VCCP2 = VCCX = VDD = 3.3 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
(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.
All other trademarks are the property of their respective owners.
The PCM2901/2903 is TI?s single-chip USB stereo audio codec with USB-compliant full-speed protocol controller and S/PDIF (only PCM2903). 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 PCM2901/2903 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.
