PecanPi® Implementation
SPEC, & TEST RESULTSImplementation
Dual flagship Burr-Brown PCM1794As in monaural mode
DIGITAL HW VOLUME CONTROL AND RE-CLOCKING
Crystek CCHD-575 oscillator — ultra-low clock jitter of 82fSec
SRC4193 for volume control
S/PDIF RECEIVER
Cirrus Logic CS8416 (starting at DAC rev 3.0)
OUTPUT STAGE
True balanced dual differential output stages, using OPA1612s, low noise Panasonic resistors, and proprietary filtering topology.
ULTRA-LOW NOISE LINEAR POWER SUPPLIES
LT3045 (0.8uV noise) for positive op-amp power supply
LT3090 (18uV noise) for negative op-amp power supply
LT3042 (0.8uV noise) for DAC Chips
HEADPHONE DRIVER
Dual parallel OPA1622s for regular headphones
Quad parallel OPA1622s for balanced headphones
Specifications
XLR OUTPUT (INCLUDING HEADPHONE DRIVER):
Signal-to-Noise Ratio (SNR): 130dB (A-weighted)
Residual Noise: 1.6uV (A-weighted)
Dynamic Range (DNR): 125dB
Total Harmonic Distortion + Noise (THD+N): -110dB or 0.0003%
Frequency Response: DC (0Hz) to 22kHz @ 48kHz sample rate
Frequency Response: DC (0Hz) to 44kHz @ 96kHz sample rate
Frequency Response: DC (0Hz) to 88kHz @ 192kHz sample rate
Output Voltage: 5Vrms (+16.2dBu)
REGULAR HEADPHONE OUTPUT:
Power into 16Ω: 781mW peak
Power into 32Ω: 390mW peak
Power into 150Ω: 83.5mW peak
Power into 300Ω: 41.6mW peak
Damping Factor: >230
RCA OUTPUT (INCLUDING HEADPHONE DRIVER):
Signal-to-Noise Ratio (SNR): 124dB (A-weighted)
Residual Noise: 1.6uV (A-weighted)
Dynamic Range (DNR): 122dB
Total Harmonic Distortion + Noise (THD+N): -110dB or 0.0003%
Frequency Response: DC (0Hz) to 22kHz @ 48kHz sample rate
Frequency Response: DC (0Hz) to 44kHz @ 96kHz sample rate
Frequency Response: DC (0Hz) to 88kHz @ 192kHz sample rate
Output Voltage: 2.5Vrms (+10.2dBu)
BALANCED HEADPHONE OUTPUT:
Power into 32Ω: 1.56W peak
Power into 150Ω: 333mW peak
Power into 600Ω: 83.5mW peak
Damping Factor: >210
SIZE:
Streamer / Ultra: 195 x 120 x 100mm (7.7 x 4.75 x 4.25in)
DAC: 97mm (3.82”) x 78.5mm (3.09”) x 38.1 mm (1.5”)
INPUT POWER:
Input Connector: Barrel Plug, 2.1mm I.D. x 5.5mm O.D. x 9.5mm
Input Voltage: 9VDC
Input Power: 20W Max (w/ Raspberry Pi)
GENERAL
Sampling Rates: 44.1, 48, 88.2, 96, 176.4 and 192kHz
Bit Rates: 16 and 24-bit
Formats: Supports all formats.
DAC Compatible Rpi Models: 1B+, 1A+, 2B, 3B, 3B+, 4B, 5, Zero, & ZeroW
DAC Compatible Asus Models: Tinker Board & Tinker Board S
S/PDIF Input: Compatible with all sampling and bit rates listed above
