Youshang, a subsidiary of the General Assembly, has launched a highly integrated Hi-Fi headset chip-level solution based on Realtek technology, targeting mid-to-high-level mobile phones, headphone amplifiers, and type-c audio headsets. This chip is Realtek's first highly integrated 32bit / 192 kHz Hi-Fi headphone chip-level solution-ALC5662 (QFN-48) & ALC5663 (WLCSP-56), which includes a two-channel DAC, two-channel Headphone amplifier (stereo headphone amplifier) ​​and mono ADC are used for analog microphones.
Compared with other earphone audio solutions, ALC5662 / ALC5663 provides high-standard music quality, with total harmonic distortion plus noise (THD + N) less than or equal to minus 100dB, signal-to-noise ratio (SNR) less than or equal to minus 124dB, and crosstalk interference ( crosstalk) is less than or equal to minus 100dB, and the headphone amplifier can output 2Vrms, which can support the perfect listening experience of high impedance headphones (250Ohm ~ 600Ohm). In addition, this solution can further perform smart earphone detection, including: earphone (3 segment) / headset (4 segment) identification, 10-stage headphone impedance detection (0Ohm ~ 50kOhm), and 4 button controls of the headset (Android Wired Audio Headset SpecificaTIon v1.1) and headsets that support OMTP / CTIA pinout.
At the same time, ALC5662 / ALC5663 also has a built-in charge pump (Charge pump), and the integration of sampling frequency converter (Asynchronous Sample Rate Converter – ASRC) into the chip, greatly reducing the system bill of materials cost (BOM cost), but also greatly reduce the system The design complexity of the above can provide audio with an output DC bias of 0V and an output amplitude of 2Vrms without the need for a special external frequency oscillator and boost-buck converter.
Figure 1-Realtek technology-based high-integration Hi-Fi headset chip-level solution launched by UGS
ALC5662 / ALC5663 Product Specifications
32bit / 192kHz Hi-Fi stereo DAC + stereo headphone amplifier
THD + N "= -100dB / SNR" = -124dB / Crosstalk "= -100dB
Output swing up to 2Vrms for 250Ohm ~ 600Ohm high impedance headphone
10-step impedance sensing for different loadings of headsets / headphones
Support headphone (3 segment) / headset (4 segment) detectTIon
Support 4 push buttons detecTIon (Android Wired Audio Headset Specification v1.1)
ALC5662–QFN-48 (6 * 5.5mm ^ 2)
ALC5663–WLCSP-56 (3.3 * 2.8mm ^ 2)
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