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PecanPi® USB - DAC and Headphone Amplifier

orchardaudio

Senior Member
Joined
Aug 24, 2018
Messages
478
Likes
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Location
Succasunna, NJ
#1
Introducing the PecanPi® USB
IMG_1437.JPG IMG_1436.JPG

Implementation
DAC chips:

  • Dual flagship Burr-Brown PCM1794As in monaural mode
Reclocking
  • Crystek CCHD-575 oscillator -- ultra-low clock jitter of 82fSec
  • SRC4193 for reclocking
Output stage: True balanced dual different output stages
  • Uses OPA1612s
  • 0.1% low noise Panasonic resistors
  • 1% high-quality COG capacitors
  • Proprietary filtering topology
Ultra-low noise linear power supplies:
  • TPS7A4700 (4.17uV noise) for positive op-amp power supply
  • TPS7A3301 (16uV noise) for negative op-amp power supply
  • TPS7A4901 (15.4uV noise) for DAC Chips
USB Interface
  • miniDSP - USB Streamer Kit
    • XMOS asynchronous USB to I2S
OS Compatability
  • Windows: ASIO driver
  • MAC OS X: driverless
  • Linux Alsa 2.0: Compliant
  • Android/iOS: Compliant
Input Power
  • Input Connector: Barrel Plug, 2.1mm I.D. x 5.5mm O.D. x 9.5mm
  • Input Voltage: 9VDC
  • Input Power: 20W
General
  • Sampling Rates: PCM up to 192kHz
  • Bit Rates: Up to 24-bit

Preorder and save 20%

Dashboard View XLR
Dashboard (XLR).JPG


Dashboard View RCA
Dashboard (RCA).JPG


Dynamic Range XLR (a-weighted)
Dynamic Range (XLR).JPG


Dynamic Range RCA (a-weighed)
Dynamic Range (RCA).JPG


Frequency Response XLR
Frequency Response (XLR).JPG


Frequency Response RCA
Frequency Response (RCA).JPG


THD+N vs Frequency at 0dBFS XLR
THD+N (XLR).JPG


THD+N vs Frequency at 0dBFS RCA
THD+N (RCA).JPG


THD+N vs Level XLR
THD+N vs Level (XLR).JPG


THD+N vs Level RCA
THD+N vs Level (RCA).JPG


Intermodulation Distortion XLR
IMD (XLR).JPG


Intermodulation Distortion RCA
IMD (RCA).JPG


Jitter Spectrum and Noise XLR
Jitter (XLR).JPG


Jitter Spectrum and Noise RCA
Jitter (RCA).JPG

 
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