ES9270 High performance USB DAC with Headphone Amplifier ADC, PLL, Jack Detect, Mic, and A/D Mixing Analog Reinvented s The ES9270 is a feature-rich 32-bit, 2-channel USB audio D/A converter with headphone amplifier, PLL, Jack Detect, ADC and support for both analog and digital mics, and analog/digital mixing. It has been designed for professional applications (mixer consoles, digital audio workstations), audiophile-grade portable applications (headphones, headphone adapters and digital music players), and consumer applications (USB DACs and A/V receivers). Using the critically acclaimed ESS patented HyperStream II QUAD DAC architecture and Time Domain Jitter Eliminator, the ES9270 delivers a performance level that will satisfy the most demanding audio enthusiast. The versatile audio input port accepts PCM, DSD and DoP. The integrated SABRE DAC supports up to 32-bit 384kHz PCM, and DSD audio data via master/slave interface in synchronous and asynchronous sampling modes. Audio rates of 384kHz and DoP are supported over USB. The integrated class-G SABRE Headphone Amp supports up to 2Vrms output. Programmable analog gain and integrated low-noise DAC reference regulator minimize noise gain at typical listening levels and reduce PCB area and BOM cost. The Jack Detect feature automatically wakes the device, accurately measures load impedance and prevents false positives due to moisture infiltration without any support from the application processor. Aux Mix mode allows analog signals to be seamlessly overlaid onto digital audio even during DSD & DoP playback. ES9270 may be customized for any application with firmware-controlled behavior and both volatile and non-volatile memory options. FEATURE DESCRIPTION Patented 32-bit HyperStream II QUAD DAC 32-bit mobile audio DAC/HPA with high dynamic range & ultra-low distortion Architecture +130dB SNR, +117dBA DNR, 2.0Vrms into 100k Supports synchronous and asynchronous sampling modes -112dB THD+N, 2.0Vrms into 100k Experience Sabre HiFi all the way to headphones -108dB THD+N, 1.0Vrms into 32 s Analog PLL Simplifies clocking requirements and reduces PCB size and BOM cost Versatile digital audio input port Supports master/slave PCM (I2S, LJ 16-32-bit), DSD and DoP formats. Customizable filter characteristics 3 preset filters, programmable filter coefficients for custom sound signature Integrated ADCs for analog/digital mixing 2 stereo PDM inputs, 1 differential analog input, 2 single-ended analog inputs 102dBA DNR, -88dB THD+N 1Vrms Mix mode for side-tone and sound overlay on digital audio Integrated low noise DAC reference regulator Programmable voltage, reduced BOM cost and improved DNR Jack Detect with moisture protection Dual pin jack detect can wake the ES9270 automatically and prevent false positives Lower noise gain at real-life listening levels Programmable analog gain Eliminates external thin film resistors, reduces PCB size and BOM cost Patented Time Domain Jitter Eliminator Unmatched audio clarity free from input clock jitter USB 2.0 Audio Support Supporting PCM 384kHz Audio rates over USB 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 ESS TECHNOLOGY, INC. 237 South Hillview Drive, Milpitas, CA 95035, USA Tel (408) 643-8800 Fax (408) 643-8801 December 23, 2019 v1.0.1 ES9270 Product Brief Functional Block Diagram DGND DVDD AVDD AVCC DAC VREF VCCA VDDA VUSB Low Noise Reg CLOCK AVCC 33 DVDD NETWORK LDO AVCC 18 XO BANDGAP PLL XI AGND CHARGE RESETB CLK DETECT / POR PUMP PNEG CLASS G PNEG VC POWER 1.8/3.3V C1 SDAM MANAGEMENT I2C MASTER SCLM C2 & CONTROL C1 VC SDAS I2C SLAVE C2 VC SCLS SMART CONTROLLER 100 INB L ADDR Bootload Interface/SPI R INT - HyperStream II HP AMP OUT L DCLK (BCK) QUAD DAC + DATA1 (WS) R GSN L DATA2 (SD) 100 DIGITAL IN L AUDIO PORT 100 INB R I2S, R GPIO1-14 DSD ACLK2 DoP - HyperStream II HP AMP OUT R ACLK1 QUAD DAC + R GSN R 100 IN R RT1 0dB-30dB, 6dB Steps S/E ADC ADC R PRE-AMP (RIGHT) D+ 1Vrms Input USB PHY D- S/E ADC PRE-AMP (LEFT) ADC L VBUS Jack/Button Detection JDET1 DIFF. MIC ADC Plug In & Out DIGITAL CORE MIC Impedance Detection JDET2 Buttons LDO PB AMIC P Differential PRE-AMP Moisture protection ZREF AMIC N 0dB-30dB, 6 dB Steps MBIAS AGND AGND Figure 1 - ES9270 Block Diagram ESS TECHNOLOGY, INC. 237 South Hillview Drive, Milpitas, CA 95035, USA Tel (408) 643-8800 Fax (408) 643-8801 2 DIGITAL FILTERS, VOLUME CONTROL MODULATORS MUX MUX