ES9028PRO datasheet(20/57 Pages) ESS

20 / 57 page

CONFIDENTIAL INFORMATION v3.6

July 6, 2020

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

Bits

[7:5]

[4:3]

[2:1]

[0]

Mnemonic

filter_shape

reserved

iir_bw

mute

Default

3’b010

2’b00

1’b0

Bit

Mnemonic

Description

[7:5]

filter_shape

Selects the type of filter to use during the 8x FIR interpolation phase.

•

3’b111: brickwall filter

•

3’b110: hybrid, fast roll-off, minimum phase filter

•

3’b100: apodizing, fast roll-off, linear phase filter

•

3’b101: reserved

•

3’b011: slow roll-off, minimum phase filter

•

3’b010: fast roll-off, minimum phase filter (default)

•

3’b001: slow roll-off, linear phase filter

•

3’b000: fast roll-off, linear phase filter

Note: The FIR filter is only applied to PCM data, DSD bypasses this phase

[4:3]

reserved

[2:1]

iir_bw

Selects the type of filter to use during the 8x IIR interpolation phase.

•

2’b11: 1.5873fs (70k @ 44.1kHz)

•

2’b10: 1.3605fs (60k @ 44.1kHz)

•

2’b01: 1.1338fs (50k @ 44.1kHz)

•

2’b00: 1.0757fs (47.44k @ 44.1kHz) (default)

Note: 47.44k filter should only be used for PCM data. Recommended

settings for DSD data are 50k, 60k or 70k.

[0]

mute

Mutes all 8 channels of the SABRE DAC.

•

1’b1: mute all eight channels

•

1’b0: normal operation (default)

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