AK4118 USB/Coaxial/Optical/AES to IIS Audio Receiver Board + 1794 Power Supply Board + Finished PCM1794A DAC Board

AK4118 USB/Coaxial/Optical/AES to IIS Audio Receiver Board + 1794 Power Supply Board + Finished PCM1794A DAC Board

Audio Receiver Board Description:
- Using AK4118 audio special moderation chip, it can receive 24bit 192K data. The AK4118 is used for coaxial signal receiving with the lowest jitter in the industry. Fully optimized by MCU software control, its performance is much better than that of schemes, including WM8805, DIR9001 and CS8416.
- The main function of this board is to convert digital audio SPDIF signal (RCA/optical/AES/EBU/Bluetooth) to IIS output. It also has an IIS input for XMOS USB modules and for Amanero USB modules (China-made USB modules for Amanero). Used with a suitable DAC board, it can form a complete DAC decoder.

Audio Receiver Board Features:
- It support 4-channel digital audio signal input. Users can set 3-4 way input combination.
- It can be used with USB modules for XMOS and Amanero (China-made USB module for Amanero) to display sampling frequency.
- OLED is used to display the working status.
- The dual-row 20-pin output connector is compatible with the USB output for Amanero.
- Its output interface has a DSD_OE signal (only for USB signal input). Used with a DAC board, it can realize PCM/DSD switching and mute control.
- All settings can be saved automatically.
- Optical/coaxial/AES: 44.1kHz/48kHz/88.2kHz/96kHz/176.4kHz/192kHz/384kHz; DSD64 (2.8M)/DSD128 (5.6M)/DSD256 (11.2M)/DSD512 (22.5M).

1794 Power Supply Board:
- Output ±12Vand 2-channel independent +5V power supply for DAC and input board.
- The 1794 power supply board uses two transformers for TALEMA to independently power the digital and analog at the μV level, improving the overall sound quality.
- Especially in the simulation part, the high-performance DC voltage regulator circuit for Sigma22 is used to provide ultra-low noise power supply for the operational amplifier and decoding simulation, while the large current brought by it has more sufficient margin to drive and amplify the signal.

Dual PCM1794A DAC Board:
- PCM1794 has a sampling rate of 24bit 192Khz, high resolution, speed and transparency, balanced three frequencies, and especially a round, sweet voice with high cost-effectiveness.
- Two PCM1794 chips are connected in parallel, greatly improving the dynamic range and signal-to-noise ratio, reaching 132dB. After parallel connection, the output current is doubled, the sound density is enhanced, the entire sound is more balanced and durable, and the background appears cleaner.
- A 1794 chip is only responsible for one channel, and the independent circuit is truly balanced. The two channels do not interfere with each other, and the sound is clear and delicate, clean and transparent.
- It is recommended to use linear power supply for power supply, which has improved details, speed, and delicacy. Linear power supply is better and more stable than the best DC to DC power supply, with a wide sound field and precise positioning.

Specification:
- Digital power supply: 5VDC
- Analog power supply: ±12V DC
- Input types: I2S
- Sampling rate: 24bit - 192kHz
- Output type: balanced output; single-ended output
- Output amplitude: RCA - 2RMS; Balanced output - 4RMS

Package Included:
- 1 x Receiver Board
- 1 x Display Control Board
- 1 x Cable
- 1 x 1794 Power Supply Board
- 1 x PCM1794A DAC Board