ES9281A/80A PRO Product Brief

April 15, 2021

0.2.5

ESS TECHNOLOGY, INC. 109 Bonaventura Drive, San Jose, CA 95134, USA Tel (408) 643-8800 • WWW.ESSTECH.COM

2

APPLICATIONS

• USB headphones, USB headphone adapters, Digital music players, Portable multimedia players

• Professional digital audio workstations and mixer consoles

• Consumer and Audiophile USB DAC headphone amplifiers and A/V receivers

Typical Application

XOUT

XIN

ADDR

SDAS

SCLS

RESETB

PCM/DSD/DoP/SPDIF/MQA

GPIO

DGND

AVDD

AVCC_DAC

VREF

AGND

PNEG

C1

C2

OUT_L

INB_L

GSN_L

IN_L

INB_R

OUT_R

IN_R

GSN_R

ES9281PRO

Application

Processor

1.8V

RT1

XTAL

DCLK (BCK)

DATA1 (WS)

DATA2 (SD)

I2C

1.8V

DVDD

AGND_L AGND_R

AVCC_18

AVCC_33

3.3V

VCCA

3.3V

C1_VC

C2_VC

PNEG_VC

GPIO

SDAM

SCLM

EEPROM

PDM

MIC

Optional

JDET1

JDET2

PB

MBIAS

AMIC_P

AMIC_N

ZREF

OSC

OSC

ACLK2

ACLK1

mic

buttons

I2C

+

+

+

+

VDDA

USB Host

D+

D-

VBUS

VUSB

ADC_R

ADC_L

CODEC

*XTAL is a requirement

Figure 1. Typical Application Diagram

Note: Please see ES9281A/ES9280A PRO reference Schematic for more complete schematic.