PecanPi® Implementation, Spec, & Test Results Implementation DAC Chips Dual flagship Burr-Brown PCM1794As in monaural mode Digital HW Volume Control and Re-clocking Crystek CCHD-575 oscillator — ultra-low clock jitter of 82fSecSRC4193 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 headphonesQuad 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) Balanced Headphone Output: Power into 32Ω: 1.56W peak Power into 150Ω: 333mW peak Power into 600Ω: 83.5mW peak Damping Factor: >210 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) 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”) RCA Output (including headphone driver): Signal-to-Noise Ratio (SNR): 124dB (A-weighted)Residual Noise: 1.6uV (A-weighted) Dynamic Range (DNR): 122dBTotal Harmonic Distortion + Noise (THD+N): -110dB or 0.0003%Frequency Response: DC (0Hz) to 22kHz @ 48kHz sample rateFrequency Response: DC (0Hz) to 44kHz @ 96kHz sample rateFrequency Response: DC (0Hz) to 88kHz @ 192kHz sample rateOutput Voltage: 2.5Vrms (+10.2dBu) Regular Headphone Output: Power into 16Ω: 781mW peakPower into 32Ω: 390mW peakPower into 150Ω: 83.5mW peakPower into 300Ω: 41.6mW peakDamping Factor: >230 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, Zero, & ZeroW DAC Compatible Asus Models: Tinker Board & Tinker Board S S/PDIF Input: Compatible with all sampling and bit rates listed above PecanPi Test Results Dynamic Range XLR output Dynamic Range RCA Output Jitter Spectrum and Noise XLR Output Jitter Spectrum and Noise RCA Output THD+N vs Frequency XLR Output THD+N vs Frequency RCA Output Intermodulation Distortion (IMD) XLR Output Intermodulation Distortion (IMD) RCA Output THD+N vs Level XLR Output THD+N vs Level RCA Output Frequency Response