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PCM2904

ACTIVE

Stereo USB1.1 CODEC with line-out, Bus-powered (HID Interface + 500mA USB Current)

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Data sheet
Errata

PCM2904

ACTIVE
Data sheet Order now

Product details

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
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
  • 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
  • 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
  • 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.
  • 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
  • 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
  • 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.

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.

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.
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Technical documentation

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Type Title Date
* Data sheet Stereo Audio CODEC with USB Interface, Single-Ended Analog Input/Output and S/PD datasheet (Rev. C) 09 Nov 2007
* Errata PCM290x Errata (Rev. A) 30 May 2008
* Errata Updated Operating Environments for PCM270x, PCM290x Applications 19 Oct 2007
Application note Key Differences Between the PCM290x and PCM290xC 14 Sep 2011
Application note Solving Enumeration Errors in USB Audio DAC and CODEC Designs 30 Oct 2009
More literature PCM2906B Read-Me-First Letter: PCM2906B and PCM2906 Difference 24 Jan 2009
User guide USB Audio Filter Driver Installation 19 Dec 2008

Design & development

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Driver or library

SLAC156 — PCM290x USB Audio Filter Driver Installation Software

Supported products & hardware

Supported products & hardware

Products
Audio USB converters
PCM2900 — Stereo USB1.1 CODEC with line-out (HID Interface) PCM2901 — Stereo USB1.1 CODEC with line-out, Self-powered (HID Interface) PCM2902 — Stereo USB1.1 CODEC with line-out and S/PDIF I/O, Bus-powered (HID Interface) PCM2903 — Stereo USB1.1 CODEC with line-out and S/PDIF I/O, Self-powered (HID Interface) PCM2904 — Stereo USB1.1 CODEC with line-out, Bus-powered (HID Interface + 500mA USB Current)
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