DEM-PCM2912A评估模块

GY@艳

DEM-PCM2912A EVM是一个完整的评估平台，16位，单声道麦克风输入和立体声耳机输出PCM2912A总线供电的音频，带USB接口的编解码器。提供用于连接音频测试系统和商用音响设备的所有必要的连接器和电路。DescriptionThe DEM-PCM2912A EVM is a complete evaluation platform for the 16-bit, mono microphone input and stereo headphone output PCM2912A bus-powered audio codec with a USB interface. All necessary connectors and circuitry are provided for interfacing to audio test systems and commercial audio equipment.A USB connector is mounted on the DEM-PCM2912A EVM. Stereo audio output and mono audio input are available on two stereo mini-jacks. The PCM2912A is an audio codec with a USB interface for a USB headset, USB headphones, and a USB audio interface box that integrates mono input, stereo headphone output, an analog loopback line, a programmable gain amplifier (PGA), and microphone bias. It is available in a 32-pin TQFP package.The DEM-PCM2912A EVM also carries the Microsoft Windows® Logo License certification from the Microsoft Windows Hardware Quality Labs (WHQL). The DEM-PCM2912A has successfully passed the Microsoft WLP test (DTM Audio) for Windows Vista® x86/x64 platforms.FeaturesMajor features of the PCM2912A include:

       

• Analog Front End: – Microphone amplifier (+20 dB gain) – Mono input       
  
• Analog Back End: – Stereo/Mono headphone amplifier or line output with volume       
  
• Analog Performance: – Dynamic range: 90 dB (DAC) – Dynamic range: 90 dB (ADC) – 25-mW headphone output at RL = 16 W       
  
• Power-Supply Voltage – Single power supply of 5.0 V (VBUS)       
  
• Low Power Dissipation: – 425 mW at analog-to-digital converter (ADC) and digital-to-analog converter (DAC) operation, 44.1 kHz – 0.8 mW in Suspend mode       
  
• Sampling Frequency: 8 kHz, 11.025 kHz, 16 kHz, 22.05 kHz, 32 kHz, 44.1 kHz, 48 kHz for ADC and DAC       
  
• Programmable Function: – –76-dB to 0-dB gain for analog outputs – –12-dB to +30-dB gain for analog inputs – –76-dB to 0-dB gain for sidetone – 0-dB/20-dB gain for microphone amplifier – High-pass filter: 0.078 ´fS cutoff frequency       
  
• Package: 32-pin TQFP       
  
• Operating Temperature Range: –25°C to +85°C 10