Low Power Codec with Speaker and Headphone Amplifier ADAU1373 FEATURES Eight single-ended or four differential analog inputs with PGAs 1 stereo ADC and 2 stereo DACs with sampling rates are provided for adjusting the gain from 12 dB to +18 dB. They from 8 kHz to 48 kHz can be configured for microphones or line level signals. Low power: 7 mW record, 6 mW playback, 48 kHz at 1.8 V Two stereo digital microphone inputs are supported four digital 8 single-ended or 4 differential inputs with PGA microphones can be connected in total. In addition, three serial 2 microphone bias reference voltages with current sense digital audio input/output ports are provided with asynchronous 2 stereo digital microphone inputs sample rate converters (ASRCs) to support various sampling rates, Flexible analog input/output mixers allowing for flexible system design in mobile phone applications. 1 stereo differential or 2 stereo single-ended line outputs The inputs can be mixed and selected before the ADC or con- True ground-centered stereo Class-G headphone amplifier, figured to bypass the ADC. Two stereo DACs are included, with capable of 2 50 mW into 16 at 1.8 V, 10% THD a flexible mixing option for routing the signals internally. Filterless stereo Class-D speaker amplifier, capable of 2 The analog output side consists of line outputs, headphone output, 880 mW into 8 at 3.6 V, 10% THD speaker output, and receiver output. Two stereo single-ended Differential earpiece amplifier capable of driving 32 line level outputs, which can be configured as two differential 2 PLLs, supporting input clocks from 8 kHz to 27 MHz 2 outputs, are included. The headphone output is stereo true ground I C control interface centered (eliminating the need for coupling capacitors), with Digital audio processing efficient Class-G (rail switching) architecture. The efficient stereo 3 digital audio input and output ports with ASRC 2 filterless Class-D switching amplifier provides ~1 W of stereo I S, PCM, right-justified, left-justified modes power for speakers. The differential receiver amplifier can be 4.05 mm 3.82 mm, 81-ball, 0.4 mm pitch WLCSP package used to connect the separate receiver speaker. Two PLL blocks, 40C to +85C operating temperature range which can lock to the inputs from 8 kHz to 27 MHz, are included. APPLICATIONS The DSP allows system designers to compensate for the real-world Mobile phones, tablet PCs, e-books, portable media players limitations of microphones, speakers, amplifiers, and listening environments, resulting in a dramatic improvement in perceived GENERAL DESCRIPTION audio quality through equalization, multiband compression, and The ADAU1373 is a low power, stereo audio codec with integrated limiting algorithms. The SigmaStudio graphical development tool, digital audio processing that supports stereo 48 kHz record and which includes audio processing blocks such as filters, mixers, playback. The stereo audio ADCs and DACs support sampling dynamics processors, and amplifiers for fast development of rates from 8 kHz to 48 kHz, as well as a digital volume control. custom signal flows, is used to program the ADAU1373. FUNCTIONAL BLOCK DIAGRAM EARPIECE AMP SERIAL EPP DIGITAL EPN AUDIO BCLKA/BCLKB/BCLKC LINEOUT2 INTERFACE LRCLKA/LRCLKB/LRCLKC INPUT A LINEOUT1 LOUT1L/LOUTLP, LOUT2L/LOUTLN FDSP SDATAINA/SDATAINB/SDATAINC OUTPUT LOUT1R/LOUTRP, LOUT2R/LOUTRN MUX SDATAOUTA/SDATAOUTB/SDATAOUTC DIGITAL LN1FBIN, LN2FBIN MUX MICROPHONE DMIC1 2 DATA MIX HEADPHONE HPL DMIC3 4 DATA AMP SGND DMIC CLK MUX HPR DAC1 ADC MIX SPEAKER SPKLP MICBIAS1, MICBIAS2 DAC2 AMP 2 SPKLN I C PLLA ANALOG SPKRP AIN1L/AIN1P TO AIN4L/AIN4P GPIO INPUTS SPKRN AIN1R/AIN1N TO AIN4R/AIN4N Figure 1. Rev. 0 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 www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Fax: 781.461.3113 2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. IOVDD1 IOVDD2 MCLK1 IOVDD3 MCLK2 IOVDD4 IOVDD5 MODE AVDD ADDR DVDD SCL HPVDD SDA CF1 SD CF2 CPVDD GPIO1 CPVSS GPIO2 SPKVDD GPIO3 GPIO4 JACKDET DGND AGND HPGND SPKGND CM 08975-023ADAU1373 TABLE OF CONTENTS Features .............................................................................................. 1 3D Enhancement........................................................................ 66 Applications....................................................................................... 1 Digital Automatic Level Control (ALC).................................. 67 General Description ......................................................................... 1 Interrupt Request (IRQ)............................................................ 69 Functional Block Diagram .............................................................. 1 Control Ports................................................................................... 70 2 Revision History ............................................................................... 6 I C Port ........................................................................................ 70 Specifications..................................................................................... 7 Register Map Summary (Default) ................................................ 73 Power Supplies .............................................................................. 7 Register Bit Descriptions........................................................... 77 Audio Performance ...................................................................... 7 INPUT MODE Register ........................................................... 77 Power Consumption .................................................................. 15 AIN1L CTRL Register .............................................................. 78 Digital Filter/SRC Characteristics............................................ 17 AIN1R CTRL Register.............................................................. 80 Digital Input/Output Specifications......................................... 17 AIN2L CTRL Register .............................................................. 82 Digital Timing Specifications ................................................... 18 AIN2R CTRL Register.............................................................. 84 Absolute Maximum Ratings.......................................................... 21 AIN3L CTRL Register .............................................................. 86 Thermal Resistance .................................................................... 21 AIN3R CTRL Register.............................................................. 88 ESD Caution................................................................................ 21 AIN4L CTRL Register .............................................................. 90 Pin Configuration and Function Descriptions........................... 22 AIN4R CTRL Register.............................................................. 92 Typical Performance Characteristics ........................................... 25 LLINE1 OUT Register.............................................................. 94 Detailed Block Diagram ................................................................ 38 RLINE1 OUT Register ............................................................. 96 Theory of Operation ...................................................................... 39 LLINE2 OUT Register.............................................................. 98 Analog Inputs.............................................................................. 39 RLINE2 OUT Register ........................................................... 100 Mixer Block ................................................................................. 41 LCD OUT (Speaker) Register ............................................... 102 Analog Outputs........................................................................... 41 RCD OUT (Speaker) Register ............................................... 104 Headphone Output..................................................................... 43 LHP OUT Register.................................................................. 106 Speaker Output ........................................................................... 44 RHP OUT Register ................................................................. 108 Analog-to-Digital Converter (ADC) ....................................... 45 ADC GAIN Register............................................................... 110 Digital-to-Analog Converter (DAC) ....................................... 45 LADC MIXER Register.......................................................... 111 Clock Generation and Distribution ......................................... 45 RADC MIXER Register ......................................................... 112 Sampling Rates............................................................................ 49 LLINE1MIX Register............................................................... 113 Setting the PLL and Clock Rates .............................................. 49 RLINE1MIX Register .............................................................. 114 Digital Microphone Input Interface......................................... 52 LLINE2MIX Register............................................................... 115 Digital Audio Interface .............................................................. 53 RLINE2MIX Register .............................................................. 116 Serial Data Input/Output Formats ........................................... 54 LCDMIX (Speaker Output) Register..................................... 117 Asynchronous Sample Rate Converter.................................... 55 RCDMIX (Speaker Output) Register..................................... 118 Mix/Mux...................................................................................... 56 LHPMIX Register..................................................................... 119 Fixed Function DSP (FDSP) ..................................................... 57 RHPMIX Register .................................................................... 120 High-Pass Filters (HPFs)........................................................... 57 EPMIX Register........................................................................ 121 Dynamic Range Control (DRC)............................................... 58 HP CTRL Register .................................................................. 122 Programmable Seven-Band Equalizer..................................... 61 HP CTRL2 Register ................................................................ 123 Coefficient Calculations ............................................................ 63 LS CTRL (Speaker) Register.................................................. 124 Bass Enhancement...................................................................... 65 EPCONTROL Register............................................................ 125 Rev. 0 Page 2 of 296