Dual AD1865R NOS DAC R2R DAC Board Vinyl Style Decoder Board Dual FPGA Clock Asynchronous Processing

Dual AD1865R NOS DAC R2R DAC Board Vinyl Style Decoder Board Dual FPGA Clock Asynchronous Processing



Specifications:
- Item name: Dual parallel R2R decoding AD1865R NOS DAC
- Size: 120*170mm
- Signal input: 1. Coaxial (SPDIF); 2. I2S
- Clock input: 1. Onboard high frequency dual crystal oscillator 2. External 10MHZ atomic clock, constant temperature clock, etc.

Voltage Input:
AC12V-0
AC0V-0

AC12V-1
AC0V-1

AC9V-0
AC0V-0

AC9V-1
AC0V-1

AC9V-2
AC0V-2

Attention:
- Each group of voltage cannot be connected in parallel (DIY users please look carefully, please bear the consequences if you connect the wrong power supply and burn the board)
- It is recommended to use a dual transformer (i.e., separate analog and digital circuits)

Signal Receiving Solution:
- Dual FPGA

Power Supply Module:
- Using LT1963 low noise voltage regulator module

Signal Support Formats:
- Coaxial supports pcm format, up to 24 bits 384Kkhz. I2S supports for Philips I2S, for XMOS interface, Italian interface, etc., Bluetooth module with I2S output, only needs to connect to pins BCK LRCK DATA.

Technical Parameter of DAC Board:
Dual AD1865Rs form a mono architecture. Direct current output cooperates with external IV circuit and lpf circuit, with precise noise cutoff technology to limit out-of-band noise, and has a very dark sound background.

Use nos method to connect to digital signal, and discard external filter chip in order to highly restore sound. Reduce design costs. This upgrade design uses dual FPGA clock asynchronous integration and noise reduction collaborative processing. When there is external 10MHz clock input, the indicator light on the external clock input board will light up. It automatically recognizes external clock, which makes this decoder board more playable.

In addition, the parameters have been tuned many times to make the sound more like a vinyl record, and the low frequency is sonorous and powerful. AD1865R is one of the classic R2R DACs. It has a long-lasting sound and a good sense of music. It has high resolution, looseness and atmosphere. The low frequency is powerful, and the sound is soft and not fatty. The human voice is sweet, not illusory, and the real presence is fully present. The decoding supports up to 24-bit 384KHZ, which is not inferior to most popular decoding chips.

Package Included:
- 1 x Decoder Board