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PCM2912A

現行

具 USB 介面、單聲道麥克風輸入和立體聲道耳機輸出的音訊轉碼器

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產品規格表
勘誤表

PCM2912A

現行
產品規格表 立即訂購

產品詳細資料

Number of ADC channels 1 Number of DAC channels 2 Control interface H/W Analog inputs 1 Analog outputs 2 Features Mic bias, PGAs, Sidetone, USB interface Sampling rate (max) (kHz) 48 Rating Catalog Operating temperature range (°C) -25 to 85
Number of ADC channels 1 Number of DAC channels 2 Control interface H/W Analog inputs 1 Analog outputs 2 Features Mic bias, PGAs, Sidetone, USB interface Sampling rate (max) (kHz) 48 Rating Catalog Operating temperature range (°C) -25 to 85
TQFP (PJT) 32 81 mm² 9 x 9
  • On-Chip USB Interface:
    • With Full-Speed Transceivers
    • Fully Compliant With USB 2.0 Specification
    • Certified By USB-IF
    • Partially Programmable Descriptors
    • Adaptive Isochronous Transfer for Playback
    • Asynchronous-Isochronous Transfer for
      Record
    • Bus Powered
  • 16-Bit Delta-Sigma ADC and DAC
  • Sampling Rate:
    • 8, 11.025, 16, 22.05, 32, 44.1, or 48 kHz
  • On-Chip Clock Generator:
    • With Single 6-MHz Clock Source
  • Mono ADC with Microphone Input
    • Analog Performance at VBUS = 5 V:
      • THD+N: 0.01%
      • SNR: 92 dB
      • Dynamic Range: 90 dB
    • Decimation Digital Filter
      • Passband Ripple: ±0.05 dB
      • Stop-Band Attenuation: –65 dB
    • Single-Ended Voltage Input
    • Antialiasing Filter Included
    • Digital HPF Included
    • Microphone Bias, Microphone Amplifier, and
      Input PGA
  • Stereo DAC With Headphone Output
    • Analog Performance at VBUS = 5.0 V:
      • THD+N: 0.01% (RL > 10 kΩ)
      • THD+N: 0.02% (RL = 32 Ω)
      • SNR: 92 dB
      • Dynamic Range: 90 dB
      • PO: 13 mW (RL = 32 Ω)
      • PO: 25 mW (RL = 16 Ω)
    • Oversampling Digital Filter
      • Passband Ripple: ±0.1 dB
      • Stop-Band Attenuation: –43 dB
      • Single-Ended Voltage Output
      • Analog LPF Included
      • Sidetone PGA, Output PGA, and HP
        Amplifier
  • Multifunctions:
    • Suspend, Playback, and Record Status Flag
    • Microphone Amplifier, Mute, and Gain Control
  • Pop/Click Noise-Free
  • Single Power-Supply: 5 V Typical (VBUS)
  • Package: 32-Pin TQFP
  • On-Chip USB Interface:
    • With Full-Speed Transceivers
    • Fully Compliant With USB 2.0 Specification
    • Certified By USB-IF
    • Partially Programmable Descriptors
    • Adaptive Isochronous Transfer for Playback
    • Asynchronous-Isochronous Transfer for
      Record
    • Bus Powered
  • 16-Bit Delta-Sigma ADC and DAC
  • Sampling Rate:
    • 8, 11.025, 16, 22.05, 32, 44.1, or 48 kHz
  • On-Chip Clock Generator:
    • With Single 6-MHz Clock Source
  • Mono ADC with Microphone Input
    • Analog Performance at VBUS = 5 V:
      • THD+N: 0.01%
      • SNR: 92 dB
      • Dynamic Range: 90 dB
    • Decimation Digital Filter
      • Passband Ripple: ±0.05 dB
      • Stop-Band Attenuation: –65 dB
    • Single-Ended Voltage Input
    • Antialiasing Filter Included
    • Digital HPF Included
    • Microphone Bias, Microphone Amplifier, and
      Input PGA
  • Stereo DAC With Headphone Output
    • Analog Performance at VBUS = 5.0 V:
      • THD+N: 0.01% (RL > 10 kΩ)
      • THD+N: 0.02% (RL = 32 Ω)
      • SNR: 92 dB
      • Dynamic Range: 90 dB
      • PO: 13 mW (RL = 32 Ω)
      • PO: 25 mW (RL = 16 Ω)
    • Oversampling Digital Filter
      • Passband Ripple: ±0.1 dB
      • Stop-Band Attenuation: –43 dB
      • Single-Ended Voltage Output
      • Analog LPF Included
      • Sidetone PGA, Output PGA, and HP
        Amplifier
  • Multifunctions:
    • Suspend, Playback, and Record Status Flag
    • Microphone Amplifier, Mute, and Gain Control
  • Pop/Click Noise-Free
  • Single Power-Supply: 5 V Typical (VBUS)
  • Package: 32-Pin TQFP

The PCM2912A is the Texas Instruments single-chip, USB stereo audio codec with a USB, 2.0-compliant, full-speed protocol controller and an analog front-end (AFE) function for headset applications.

The USB protocol controller works with no software code, but USB descriptors can be modified on request. The PCM2912A employs SpAct™ architecture, TI’s unique system that recovers the audio clock from USB packet data. On-chip analog PLLs with SpAct enables independent playback and record sampling rates with low clock jitters.

The PCM2912A is the Texas Instruments single-chip, USB stereo audio codec with a USB, 2.0-compliant, full-speed protocol controller and an analog front-end (AFE) function for headset applications.

The USB protocol controller works with no software code, but USB descriptors can be modified on request. The PCM2912A employs SpAct™ architecture, TI’s unique system that recovers the audio clock from USB packet data. On-chip analog PLLs with SpAct enables independent playback and record sampling rates with low clock jitters.
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類型 標題 日期
* Data sheet PCM2912A Audio Codec With USB Interface, Mono Microphone Input and Stereo Headphone Output datasheet (Rev. A) PDF | HTML 2015年 8月 25日
* Errata Application Information for Difference Between PCM2912A and PCM2912 2008年 11月 25日
Application note Operating Environments for PCM2912A Applications (Rev. A) 2016年 11月 10日
Application note Solving Enumeration Errors in USB Audio DAC and CODEC Designs 2009年 10月 30日

設計與開發

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開發板

DEM-PCM2912AEVM — DEM-PCM2912AEVM 評估模組

DEM-PCM2912A EVM 是完整的評估平台，適用於具有 USB 介面的 16 位元、單聲道麥克風輸入和立體聲耳機輸出 PCM2912A 匯流排供電音訊編解碼器。提供所有必要的連接器和電路，以介接音訊測試系統和商業音訊設備。

DEM-PCM2912A EVM 上裝有 USB 連接器。兩個立體聲迷你插孔提供立體聲音訊輸出和單聲道音訊輸入。PCM2912A 是一款配備 USB 介面的音訊編解碼器，適用於 USB 頭戴式耳機、USB 耳機，以及整合單聲道輸入、立體聲耳機輸出、類比回送線路、可編程增益放大器 (PGA) 及麥克風偏壓的 USB 音訊介面盒。其採用 32 接腳 TQFP 封裝。

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