Audio Codec 2ADC / 2DAC 16-Bit 28-Pin SSOP T/R

The PCM2903B is Texas Instruments" single-chip, USB, stereo audio codec with a USB-compliant full-speed protocol controller and S/PDIF. The USB protocol controller requires no software code, but the USB descriptors can be modified in some areas (for example, vendor ID and/or product ID). The PCM2903B 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 as well as independent playback and record sampling rates. 

On-Chip USB Interface:

• With Full-Speed Transceivers
• Fully Compliant with USB 2.0 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

S/PDIF Input/Output

Single Power Supply:

• 3.3 V Typical

Stereo ADC:

• Analog Performance at V_CCC = V_CCP1 = V_CCP2
  = V_CCX = V_DD = 3.3 V:
  • THD+N = 0.01%
  • SNR = 89 dB
  • Dynamic Range = 89 dB
• Decimation Digital Filter:
  • Passband Ripple = ±0.05 dB
  • Stop-Band Attenuation = -65 dB
• Single-Ended Voltage Input
• Antialiasing Filter Included
• Digital HPF Included

Stereo DAC:

• Analog Performance at V_CCC = V_CCP1 = V_CCP2
  = V_CCX = V_DD = 3.3 V:
  • THD+N = 0.005%
  • SNR = 96 dB
  • Dynamic Range = 93 dB
• Oversampling Digital Filter:
  • Passband Ripple = ±0.1 dB
  • Stop-Band Attenuation = -43 dB
• Single-Ended Voltage Output
• Analog LPF Included

Multifunctions:

• Human Interface Device (HID) Function:
  • Volume and and Mute Controls
• Suspend Flag Function

28-Pin SSOP Package

APPLICATIONS

• USB Audio Speaker
• USB Headset
• USB Monitor
• USB Audio Interface Box