ES9028PRO datasheet(11/57 Pages) ESS

11 / 57 page

July 6, 2020

CONFIDENTIAL INFORMATION v3.6

ES9028PRO 32-Bit HyperStream® II 8-Channel Audio DAC

ESS TECHNOLOGY, INC. 237 South Hillview Drive, Milpitas, CA 95035, USA. Tel (408) 643-

8800 • Fax (408) 643-8801

THD Compensation

THD Compensation can be used to minimize distortion from external PCB components and layout through the generation of

inverse second and third harmonic components matching the target system distortion profile.

THD compensation can be enabled via thd_enb in Register 13: Jitter Eliminator / DPLL Configuration & THD Bypass.

The coefficient for manipulating second harmonic distortion is stored in Register 28-29: THD Compensation C2.

The coefficient for manipulating third harmonic distortion is stored in Register 30-31: THD Compensation C3.

All channels use the same compensation coefficients.

Full Channel Mapping, Mono Mode and Stereo Mode

Channel mapping allows output channels to be remapped to arbitrary input channels for optimized PCB routing

Clearing stereo_mode in Register 15: GPIO Input Selection & Volume Configuration allows the data for each DAC to be

sourced from any input channel using Registers 38-41: DAC Channel Mapping.

•

Mono mode can be implemented by channel mapping all output DAC sources to the same input channel

Setting stereo_mode in Register 15: GPIO Input Selection & Volume Configuration will source DAC channels 1/3/5/7 and

channels 2/4/6/8 from input channel 1 and 2.

In SPDIF mode, DAC channels 1/3/5/7 and channels 2/4/6/8 are sourced from SPDIF input left and right channels.

Power Supplies

To minimize THD+N, AVCC_L and AVCC_R must be powered by low-noise +3.3V supplies. Although AVCC_L and

AVCC_R could be powered from a single low-noise supply, crosstalk would be compromised and so separate +3.3V supplies

are highly recommended. The ES9311Q dual ultra-low noise regulator is designed to power AVCC_L and AVCC_R and

minimize THD+N and crosstalk on all SABRE PRO DACs.

ES9028PRO 数据表(PDF) 11 Page - ESS Technology,Inc