PCM2904

具有 USB 接口、单端输入/输出和 SPDI/F 的立体声音频编解码器

The /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, "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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PCM2904: Without S/PDIF

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PCM2906: With S/PDIF

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On-Chip USB Interface:

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With Full-Speed Transceivers

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Fully Compliant With USB 1.1 Specification

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Certified by USB-IF

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Partially Programmable Descriptors1

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USB Adaptive Mode for Playback

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USB Asynchronous Mode for Record

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Bus Powered

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16-Bit Delta-Sigma ADC and DAC

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Sampling Rate:

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DAC: 32, 44.1, 48 kHz

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ADC: 8, 11.025, 16, 22.05, 32, 44.1, 48 kHz

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On-Chip Clock Generator With Single 12-MHz Clock Source

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Single Power Supply: 5 V Typical VBUS

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Stereo ADC

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Analog Performance at VBUS = 5 V

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THD+N = 0.01%

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SNR = 89 dB

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Dynamic Range = 89 dB

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Decimation Digital Filter

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Pass-Band Ripple = ±0.05 dB

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Stop-Band Attenuation = -65 dB

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Single-Ended Voltage Input

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Antialiasing Filter Included

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Digital LCF Included

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Stereo DAC:

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Analog Performance at VBUS = 5 V

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THD+N = 0.005%

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SNR = 96 dB

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Dynamic Range = 93 dB

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Oversampling Digital Filter

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Pass-Band Ripple = ±0.1 dB

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Stop-Band Attenuation = -43 dB

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Single-Ended Voltage Output

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Analog LPF Included

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Multifunctions:

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Human Interface Device HID Volume ± Control and Mute Control

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Suspend Flag

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Package: 28-Pin SSOP

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APPLICATIONS

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USB Audio Speaker

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USB Headset

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USB Monitor

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USB Audio Interface Box

1The 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.