WM8953 w Low Power Stereo ADC with PLL and TDM Interface DESCRIPTION FEATURES SNR 94dB (A weighted) The WM8953 is a low power high performance stereo ADC THD -82dB at 48kHz, 3.3V designed for mobile handsets and other portable devices. Full stereo microphone / line input interface Four single-ended or differential input connections are provided, Low noise MICBIAS with up to 60dB of analogue gain in each input path. Stereo 24- Low power consumption bit sigma-delta ADCs provide hi-fi quality audio recording of Full analogue and digital volume control microphones or line input. A programmable high pass filter is PLL provides flexible clocking scheme available in the ADC path for removing DC offsets and 2-wire, 3-wire or 4-wire control suppressing wind and other low frequency noise. Sample rates: 8, 11.025, 12, 16, 22.05, 24, 32, 44.1, 48kHz GPIO functions available A low noise microphone bias with programmable current detect Digital supply: 1.71V 3.6V and short-circuit detect is provided. Analogue supply: 2.7V 3.6V A flexible digital audio interface supports most commonly-used W-CSP package (3.226 x 3.44 x 0.7mm, 0.5mm pitch) clocking schemes. The audio interface supports TDM and APPLICATIONS tristate outputs allow multiple devices to share the same interface. Multimedia phones An integrated low power PLL provides support for most General purpose low power audio ADC commonly-used audio sample rates. The WM8953 is supplied in very small and thin 42-ball WCSP package, ideal for portable systems. Production Data, January 2009, Rev 4.0 WOLFSON MICROELECTRONICS plc To receive regular email updates, sign up at WM8953 Production Data TABLE OF CONTENTS DESCRIPTION .......................................................................................................1 FEATURES.............................................................................................................1 APPLICATIONS .....................................................................................................1 TABLE OF CONTENTS .........................................................................................2 BLOCK DIAGRAM .................................................................................................3 PIN CONFIGURATION...........................................................................................4 ORDERING INFORMATION ..................................................................................4 PIN DESCRIPTION ................................................................................................5 ABSOLUTE MAXIMUM RATINGS.........................................................................6 RECOMMENDED OPERATING CONDITIONS .....................................................6 THERMAL PERFORMANCE .................................................................................7 ELECTRICAL CHARACTERISTICS ......................................................................8 TERMINOLOGY........................................................................................................... 12 TYPICAL POWER CONSUMPTION ....................................................................13 PSRR PERFORMANCE.......................................................................................14 AUDIO SIGNAL PATHS.......................................................................................15 SIGNAL TIMING REQUIREMENTS.....................................................................16 SYSTEM CLOCK TIMING............................................................................................ 16 AUDIO INTERFACE TIMING MASTER MODE......................................................... 17 AUDIO INTERFACE TIMING SLAVE MODE ............................................................ 18 AUDIO INTERFACE TIMING TDM MODE ................................................................ 19 CONTROL INTERFACE TIMING 2-WIRE MODE..................................................... 20 CONTROL INTERFACE TIMING 3-WIRE MODE..................................................... 21 CONTROL INTERFACE TIMING 4-WIRE MODE..................................................... 22 INTERNAL POWER ON RESET CIRCUIT ..........................................................23 DEVICE DESCRIPTION.......................................................................................25 INTRODUCTION.......................................................................................................... 25 INPUT SIGNAL PATH.................................................................................................. 26 ANALOGUE TO DIGITAL CONVERTER (ADC) .......................................................... 36 DIGITAL AUDIO PATHS.............................................................................................. 39 THERMAL SENSING ................................................................................................... 40 GENERAL PURPOSE INPUT/OUTPUT ...................................................................... 41 DIGITAL AUDIO INTERFACE...................................................................................... 56 DIGITAL AUDIO INTERFACE CONTROL ................................................................... 63 CLOCKING AND SAMPLE RATES.............................................................................. 67 CONTROL INTERFACE .............................................................................................. 75 POWER MANAGEMENT ............................................................................................. 79 POWER DOMAINS...................................................................................................... 81 REGISTER MAP...................................................................................................82 REGISTER BITS BY ADDRESS .................................................................................. 84 DIGITAL FILTER CHARACTERISTICS ...............................................................97 ADC FILTER RESPONSES ......................................................................................... 97 ADC HIGH PASS FILTER RESPONSES..................................................................... 97 APPLICATIONS INFORMATION .........................................................................98 RECOMMENDED EXTERNAL COMPONENTS........................................................... 98 PACKAGE DIMENSIONS ....................................................................................99 IMPORTANT NOTICE ........................................................................................100 ADDRESS:................................................................................................................. 100 PD, January 2009, Rev 4.0 w 2