Data Sheet ADAU1850 Three ADCs, One DAC, Low Power Codec with Audio/FastDSP FEATURES GENERAL DESCRIPTION Programmable FastDSP audio processing engine The ADAU1850 is a codec with three inputs and one output that incorporates one digital signal processor. The path from the analog Up to 768 kHz sample rate input to the DSP core to the analog output is optimized for low la- Biquad filters, limiters, volume controls, mixing tency and is ideal for noise canceling earphones. With the addition Low latency, 24-bit ADCs and DAC of a few passive components, the ADAU1850 provides a complete 106 dB SNR (signal through ADC with A-weighted filter) headset solution. 110 dB combined SNR (signal through DAC and headphone The ADAU1850 is provided in a small, 28-ball, 2.957 mm 1.757 with A-weighted filter) mm wafer level chip scale package (WLCSP). Serial port sample rates from 8 kHz to 768 kHz 5 s analog-to-analog group delay Programmable, double precision MAC engine for 13-stage equalizer 3 analog inputs (2 differential and 1 single-ended), configurable as microphone or line inputs Analog differential audio output, configurable as either line output or headphone driver PLL supporting any input clock rate from 30 kHz to 27 MHz 1-channel ASRCI, 3-channel ASRCO 2 Serial audio ports supporting I S, left justified, or up to 16-chan- nel TDM (TDM16) 2 interpolators and 4 decimators with flexible routing Power supplies Analog AVDD at 1.8 V Digital I/O IOVDD at 1.8 V to 3.3 V Headphone HPVDD at 1.8 V Headphone HPVDD L at 1.2 V to1.8 V Control/communication interfaces 2 I C, SPI, or UART 28-ball, 0.4 mm pitch, 2.957 mm 1.757 mm WLCSP APPLICATIONS Noise canceling handsets, headsets, and headphones Bluetooth active noise canceling (ANC) handsets, headsets, and headphones Personal navigation devices Digital still and video cameras Musical instrument effect processors Multimedia speaker systems Smartphones Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliableas i. However, no responsibility is assumed by Analog DOCUMENT FEEDBACK Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and TECHNICAL SUPPORT registered trademarks are the property of their respective owners.Data Sheet ADAU1850 TABLE OF CONTENTS Features................................................................ 1 Thermal Resistance......................................... 14 Applications........................................................... 1 Electrostatic Discharge (ESD) Ratings.............14 General Description...............................................1 ESD Caution.....................................................14 Functional Block Diagram......................................3 Pin Configuration and Function Descriptions...... 15 Specifications........................................................ 4 Typical Performance Characteristics...................17 Analog Performance Specifications................... 4 Theory of Operation.............................................24 Digital Input and Output Specifications.............. 9 Applications Information...................................... 25 Power Supply Specifications..............................9 Power Supply Bypass Capacitors.................... 25 Power-Down Current..........................................9 Layout...............................................................25 Typical Power Consumption.............................10 Grounding.........................................................25 Digital Filters.....................................................10 Outline Dimensions............................................. 26 Digital Timing Specifications.............................11 Ordering Guide.................................................26 Absolute Maximum Ratings.................................14 Evaluation Boards............................................ 26 REVISION HISTORY 7/2021Revision 0: Initial Version analog.com Rev. 0 2 of 26