TPA6120A2

• Very high performance preamplifier; measurement results with H-DAC and 2 Vrms output:
  • Dynamic range / SNR: 116 dB (A-weighted)
  • THD+N ratio: -102 dB (2.0 Vrms / 1 kHz, 48 kHz sample rate)
  • Crosstalk at 10 kHz: -113 dB
• Very high performance headphone amplifier
  • Dynamic range / SNR: 115 dB (A-weighted)
  • Maximum output power / THD+N ratio:
    • 22 mW / -98 dB into 560 ohms
    • 230 mW / -85 dB into 33 ohms
    • More gain can be added for higher output power
• Software controlled (Arduino compatible)
• Balanced outputs (XLR) on-board and unbalanced connectors (RCA) on H-DAC board
• Takes supplies and audio signals directly from H-DAC via pinheaders
• 10×10 cm 4-layer PCB shaped to fit tall components on H-DAC board; PGA4311 volume control, LM49724 and LM4562 opamps (or any with the same pinouts), TPA6120A2 headphone amplifier, optional THAT1606 balanced drivers

H-PreAmp is an addon board for H-DAC, transforming the fixed-output DAC into a very high quality preamplifier with integrated headphone amplifier. H-DAC and H-PreAmp together provide single-ended (RCA) and balanced (XLR) outputs as well as headphone amplifier.