The Well-Tempered Computer, an introduction to computer audio

Showing posts with label PWM. Show all posts
Showing posts with label PWM. Show all posts

Sunday, March 4, 2012

NAD M51 Direct Digital DAC

35-bit 844kHz DAC and Digital Preamp.

Manufactures description:
Running at 108MHz, the M51 resamples the incoming pulse code modulated (PCM) signal and converts it to a pulse width modulation signal (PWM) with a sampling rate of 844kHz. Operating in a differential mode with double precision, the M51 has state-of-the-art specifications for low noise and freedom from distortion. The extreme headroom afforded by the 35-bit architecture allows for a DSP-based volume control that does not reduce resolution. Even with 24-bit high definition signals, the output can be attenuated by 66dB (very, very quiet) before bit truncation begins.

Specifications
Rated Distortion (THD+N with AES 17 filter) <0.0005% (0dBFS)
IMD Distortion 0.0001%
Signal/Noise Ratio <-125dB (ref. 0dBFS 2V out)
Channel Separation >-115dB (ref. 0dBFS Volume -1dB)
Sample Rate 32kHz to 192kHz (USB and digital S/PDIF)
Frequency Response ±0.5dB (ref. 20Hz - 96kHz sample rate)
Output Level 2V (ref. input 0dBFS)

Input

  • XLR - AES/EBU
  • SPDIF Coaxial x 1
  • Optical x 1
  • HDMI x 2 (stereo only)
  • USB Audio Codec 2.0: asynchronous 24/192 support


Output

  • HDMI Video Out (3D video pass through)
  • Analogue Unbalanced and Balanced