In the first half of the year, the AD1865R decoder board developed by the store has been favored by the majority of enthusiasts. Until now, the AD1865R chip has become less and less, resulting in the inability to continue production. So in the process of constantly trying to find alternatives, I accidentally discovered the old chip of AD1852. As an old chip, it seems to be a bit outdated, but it also represents the status that can not be ignored in that period. After some inspection, I found AD1852. It is not low-key at all, and its figure often appears on the European name. So just take it and try it. It's hard to imagine that things from that era are not ambiguous at all. First of all, the sound of this chip is very clean and the sound line is clear. Regardless of vocals, strings, drums, and piano tails, these tests can't test the AD1852. It can be intact and perfectly restored.The AK4118 is deliberately used as a coaxial receiver chip when designing the decoder board. It has the industry's extremely low jitter performance, and its advantages combined with the characteristics of the AD1852 can truly show the sound.
AD1852 HIRES DAC, one of the earlier developed HIRES chips from Analog Devices.
Decoder board size: 68*94mm (excluding the protruding part of the coaxial input socket)powered by:1. D5V DAC digital circuit power supply2. A5V DAC analog circuit power supply3. +/-15V op amp analog circuit power supplySupport input method:Coaxial2. IIS (IIS 24 bit, RJ16, RJ18, RJ20 bit)Design features: The AK4118 IIS output format on the board and the back of the AD1852 IIS input format have JUMP point selection. I have tried it and can be easily modified into the Japanese SONY right-aligned format CD player. The Philips format is waiting for users to try, and there is no one to try because of limited conditions. It is also impossible to provide technical support in this respect (because not only basic knowledge is required, but also oscilloscopes and other equipment are encountered when encountering problems. It is not recommended for novice and non-professional players to modify the CD. Any consequences of unauthorized operation are irrelevant to the store) Design reference to the British treasure G07 fever CD circuit improved design, increase the discrete transistor buffer output, the actual measurement can effectively improve the more indicators.The AD1852 chip is one of the representative works of ADI's new generation DA, which can be seen on sound cards, CD players, and DVDs. Technical Data Sheet for AD1852: Stereo, 24-bit, 192 kHz, multi-bit sigma-delta DAC, a complete 18/20/24-bit single-chip, stereo digital audio playback system with multiple Σ-Δ modulators, digital Interpolation filter and analog output drive circuit. Other features include an on-chip stereo attenuator and mute via SPI-compatible serial control port programming. The device is fully compatible with all existing DVD formats, including 96 kHz, 192 kHz sampling frequency and 24-bit format. It also has backward compatibility, supporting 50/15 μs digital de-emphasis for “Red Book” compact discs, and de-emphasis at 32 kHz and 48 kHz sample rates.