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ES9842PRO 데이터시트(PDF) 12 Page - ESS Technology,Inc |
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ES9842PRO 데이터시트(HTML) 12 Page - ESS Technology,Inc |
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12 / 167 page ![]() CONFIDENTIAL ADVANCE INFORMATION ES9842 PRO Product Datasheet 12 VERSION 0.5 ESS TECHNOLOGY, INC. 109 Bonaventura Drive, San Jose, CA 95134, USA Tel (408) 643-8800 WWW.ESSTECH.COM Digital Features Digital Signal Path SABRE ADC DIGITAL PATH (2 CHANNEL) 6 VOLUME CONTROL 32 32 32 32 32 32 32 -32 Distortion Compensation ADC DATA DC Block IIR 128xFS IIR 8xFS CLIP DETECTION TDM/I2S/ DSD/SPDIF DFIR 1xFS ASP FORMATTING x1, x2, x4 GAIN I2S Decoder Programmable Delay Figure 3 - Digital signal path Distortion Compensation3 Distortion Compensation minimizes the non-linearities of the ADCs. The ES9842 PRO can help compensate for system second and third harmonic distortion. For best results, compensation coefficients should be tuned for each device in-situ. THD compensation can be enabled or bypassed by setting ADCx_ENABLE_THD_COMP for each channel. THD Compensation Enable Registers • Register 102[0]: ADC1_ENABLE_THD_COMP • Register 119[0]: ADC2_ENABLE_THD_COMP • Register 136[0]: ADC3_ENABLE_THD_COMP • Register 153[0]: ADC4_ENABLE_THD_COMP Ask your FAE or distributor for the Distortion Compensation application note. Volume Control This volume control is intended for use during audio playback. Each channel can be digitally attenuated from 0dB to –84dB in 0.5dB steps. The attenuation circuit automatically uses micro-stepping between 0.5dB register settings so that no switching noise occurs during the volume control transition. When a new volume level is set, the attenuation circuit will ramp softly to the new level. Each 0.5dB step takes up to 64 intermediate steps depending on the CHx VOLUME RATE setting. Volume Level Configuration Registers • Register 109-110: ADC CH1 VOLUME • Register 126-127: ADC CH2 VOLUME • Register 143-144: ADC CH3 VOLUME • Register 160-161: ADC CH4 VOLUME 3 For more information on using Distortion Compensation, please reference the Distortion Compensation Application Note. Available from your local FAE upon request. |
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