Core specifications
ALC888S-VD2-GR belongs to the Realtek ALC888S series of high-performance 7.1+2-channel high-definition audio Codec, providing10 DAC channels, can support both7.1 surround sound playback, plus 2 independent stereo outputs (multi-stream) through the front panel.ADC integration3-way stereo ADCand 1-channel stereo digital microphone converter that supports acoustic echo cancellation (AEC), beamforming (BF) and noise suppression (NS) technology of the microphone array.
In terms of sampling accuracy and rate, both DAC and ADC support16/20/24-bit PCM format, sampling rate up to192kHz.The signal-to-noise ratio parameter isDAC typical 97dB (A-weighted), ADC is 90dB. In some application scenarios, the DAC SNR of this model can reach105dBLow noise floor and high fidelity level.
For power supply,Digital 3.3V and analog 5V dual power supply modes, built-in LDO low dropout voltage regulator, greatly simplifying peripheral circuit design.The package adoptsLQFP-48(7mm×7mm), working temperature range0℃ to 70℃, adapted to the working conditions of most civil and industrial equipment.This model is an upgraded version of ALC888S-VC with lower power consumption.
In terms of interface configuration, all analog I/O supports flexible redefinition of input and output multiplexing, and a headphone amplifier is integrated into the three analog output ports of Port-D/E/F.SPDIF equipmentMain and secondary independent SPDIF outputs, supports 16/20/24-bit formats, the sampling rate is up to 192kHz, and can be directly connected to digital decoders and speakers.The second SPDIF output also supports digital audio transmission to an HDMI transmitter.In addition, Port-B/C/E/F supports software-selectable +10/+20/+30dB gain boost for analog microphone input.This chip supports host audio from Intel chipsets and any other HDA compatible audio controller.
Model interpretation and product positioning
In the model naming of ALC888S-VD2-GR, ALC888S represents the high-definition audio Codec product line of Realtek ALC888 series, VD represents a specific function version, and 2-GR may correspond to a specific OEM customization or board-level version identification.As an extended model of the Realtek ALC888 series, this chip has been optimized for low power consumption based on the mature software and hardware architecture of the classic ALC888. The built-in LDO regulator further reduces the customer's peripheral circuit costs.
The chip supports rich software functions such as environmental sound effect simulation, multi-band independent software equalizer, dynamic range compression and expansion, and can be equipped with various sound effect enhancement solutions such as Dolby PCEE, SRS TruSurround HD, DTS Surround Sensation, etc. to provide PC users with high-quality entertainment experience and game immersion.
Typical application scenarios
This chip has a wide range of applications and is especially suitable for desktop and industrial equipment that require high compatibility and stable audio output.
Desktop computer motherboards and notebook computersIt is the core application direction of ALC888S-VD2-GR. It is widely integrated in low-end to mainstream motherboards to provide onboard high-definition audio solutions.Industrial computers and industrial all-in-one computersThis chip is also widely used. In x86 architecture industrial control motherboards, the ALC888S series is widely used for multi-channel audio collection and output.HTPC and home audio-visual hostIn terms of aspect, the 7.1 surround sound output and SPDIF digital audio interface can be directly connected to the home theater power amplifier system to meet the audio needs of high-definition film and television playback.External USB/PCI independent sound card, recording equipment and live audio collection hardwareThis chip is also commonly seen.In addition, inVR/AR equipment, entertainment game consolesThere is also room for application in scenarios that require an immersive audio experience.
Related models and alternative references
ALC888S-VD2-GR belongs to the Realtek ALC888 series, which provides a wide range of specifications.
Same series, same functions, different versions：ALC888S-VDIt is the basic version model of this series, and its functions are consistent with VD2-GR.ALC888-GRIt is the classic ALC888 standard version.ALC888S-VCIt is the previous version of this series, and the VD version is its low-power upgrade.
Horizontal comparison of performance of the same series：ALC887It is an entry-level alternative model suitable for cost-sensitive projects that do not require high audio quality.ALC889It is a higher-end model with a higher signal-to-noise ratio and is suitable for scenarios that have higher requirements for audio quality.ALC892It is a newer model and its performance is similar to ALC888.The above four models are all packaged in LQFP-48, support HDA bus, and can switch to different performance levels under the same PCB layout.
Cross-category alternative reference: Audio solutions based on the USB UAC protocol on the market (such as KT0235H, CM7104, etc.) overlap in function with the ALC888S, but the bus interface is changed from HDA to USB, which is a reconstruction of the audio path level rather than a direct replacement.If such a solution is considered, bus interface differences, driver compatibility, and BOM revision costs need to be carefully evaluated.When selecting, you should also note that the ALC888S-VD2-GR itself does not support the stereo mixing function, which is different from some ALC888 models.
write at the end
As a classic 7.1+2-channel high-definition audio Codec, Realtek ALC888S-VD2-GR features 10 DAC channels, 24-bit/192kHz high sampling specifications, dual SPDIF outputs, and LQFP-48 standard packaging. It provides a mature and stable hardware solution in audio application scenarios such as desktop motherboards, industrial control equipment, HTPC audio-visual systems, and external sound cards.Its low-power optimization and built-in LDO design further reduce the complexity of peripheral circuits. After years of market verification, it is still the benchmark that many engineers repeatedly refer to in motherboard integrated audio solutions.
As a chip agent distributor that has been deeply involved in the electronic components industry since 2011, Shenzhen Hongmai Electronics Co., Ltd. has long-term stock of Realtek ALC888S-VD2-GR and ALC888 series full-model audio Codecs in original stock. It also supplies branch models of different specifications such as ALC887, ALC889, ALC892, etc., and supports factory batch direct shipment, small batch samples and technical selection assistance.If you need to inquire about prices or need advice on selection of different performance levels of the same series, please feel free to contact us (tel: 0755-23815611, QQ 2355878270).Shenzhen Hongmai Electronics Co., Ltd.
