PCM2901

具有线性输出、自加电的立体声 USB1.1 编解码器（HID 接口）

The /2903 is ’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.

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PCM2901: Without S/PDIF

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PCM2903: 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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Self-Powered

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16-Bit Delta-Sigma ADC and DAC

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Sampling Rates

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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: 3.3 V Typical

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Stereo ADC

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Analog Performance at VCCC = VCCP1 = VCCP2 = VCCX = VDD = 3.3 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 VCCC = VCCP1 = VCCP2 = VCCX = VDD = 3.3 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

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.