Low Power Audio Codec Data Sheet SSM2604 FEATURES GENERAL DESCRIPTION Stereo, 24-bit analog-to-digital and digital-to-analog converters The SSM2604 is a low power, high quality stereo audio codec DAC SNR: 100 dB (A-weighted), THD: 80 dB at 48 kHz, 3.3 V for portable digital audio applications with one set of stereo ADC SNR: 90 dB (A-weighted), THD: 80 dB at 48 kHz, 3.3 V programmable gain amplifier (PGA) line inputs. It features two Stereo line inputs 24-bit analog-to-digital converter (ADC) channels and two Low power 24-bit digital-to-analog (DAC) converter channels. 7 mW stereo playback (1.8 V/1.5 V supplies) The SSM2604 can operate as a master or a slave. It supports 14 mW record and playback (1.8 V/1.5 V supplies) various master clock frequencies, including 12 MHz or 24 MHz Low supply voltages for USB devices standard 256 f or 384 f based rates, such as S S Analog: 1.8 V to 3.6 V 12.288 MHz and 24.576 MHz and many common audio sam- Digital: 1.5 V to 3.6 V pling rates, such as 96 kHz, 88.2 kHz, 48 kHz, 44.1 kHz, 32 kHz, 256/384 oversampling rate in normal mode 24 kHz, 22.05 kHz, 16 kHz, 12 kHz, 11.025 kHz, and 8 kHz. 250/272 oversampling rate in USB mode The SSM2604 can operate at power supplies as low as 1.8 V for Audio sampling rates: 8 kHz, 11.025 kHz, 12 kHz, 16 kHz, the analog circuitry and as low as 1.5 V for the digital circuitry. 22.05 kHz, 24 kHz, 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, The maximum voltage supply is 3.6 V for all supplies. and 96 kHz 20-lead, 4 mm 4 mm LFCSP (QFN) package The SSM2604 is specified over the industrial temperature range of 40C to +85C. It is available in a 20-lead, 4 mm 4 mm APPLICATIONS lead frame chip scale package (LFCSP). Mobile phones MP3 players Portable gaming Portable electronics Educational toys FUNCTIONAL BLOCK DIAGRAM AVDD VMID AGND DVDD DGND SSM2604 BYPASS 34.5dB TO +33dB, 1.5dB STEP ADC DAC RLINEIN ROUT DIGITAL PROCESSOR LLINEIN ADC DAC LOUT 34.5dB TO +33dB, 1.5dB STEP BYPASS CLK DIGITAL AUDIO INTERFACE CONTROL INTERFACE MCLK/ XTO CLKOUT PBDAT RECDAT BCLK PBLRC RECLRC SDIN SCLK XTI Figure 1. Rev. B Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20082018 Analog Devices, Inc. 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Technical Support www.analog.com 06978-001SSM2604 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Analog Interface ......................................................................... 12 Applications ....................................................................................... 1 Digital Audio Interface .............................................................. 12 General Description ......................................................................... 1 Software Control Interface ........................................................ 15 Functional Block Diagram .............................................................. 1 Control Register Sequencing .................................................... 15 Revision History ............................................................................... 2 Typical Application Circuits ......................................................... 16 Specif icat ions ..................................................................................... 3 Register Map ................................................................................... 17 Digital Filter Characteristics ....................................................... 4 Register Map Details ...................................................................... 18 Timing Characteristics ................................................................ 5 Left-Channel ADC Input Volume, Address 0x00 .................. 18 Absolute Maximum Ratings ............................................................ 7 Right-Channel ADC Input Volume, Address 0x01 ............... 19 Thermal Resistance ...................................................................... 7 Analog Audio Path, Address 0x04 ........................................... 20 ESD Caution .................................................................................. 7 Digital Audio Path, Address 0x05 ............................................ 20 Pin Configuration and Function Descriptions ............................. 8 Power Management, Address 0x06 .......................................... 21 Typical Performance Characteristics ............................................. 9 Digital Audio I/F, Address 0x07 ............................................... 22 Converter Filter Response ........................................................... 9 Sampling Rate, Address 0x08 .................................................... 22 Digital De-Emphasis .................................................................. 10 Active, Address 0x09 .................................................................. 25 Theory of Operation ...................................................................... 11 Software Reset, Address 0x0F ................................................... 25 Digital Core ................................................................................. 11 Outline Dimensions ....................................................................... 26 ADC and DAC ............................................................................ 11 Ordering Guide .......................................................................... 26 ADC High-Pass and DAC De-Emphasis Filters .................... 11 REVISION HISTORY 8/2018Rev. A to Rev. B Changes to Table 8 ............................................................................ 7 Changes to Figure 6 .......................................................................... 8 Changes to Outline Dimensions ................................................... 26 Changes to Ordering Guide .......................................................... 26 6/2013Rev. 0 to Rev. A Changes to Table 8 ............................................................................ 7 Added Control Register Sequencing Section .............................. 15 Updated Outline Dimensions ....................................................... 26 7/2008Revision 0: Initial Version Rev. B Page 2 of 28