WM9081 w Mono DAC with 2.6W Class AB/D Speaker Driver, Dynamic Range Controller and ReTune Mobile Parametric Equalizer DESCRIPTION FEATURES High-power, high performance DAC and speaker driver The WM9081 is designed to provide high power output at 92dB SNR (A-weighted) in Class D mode low distortion levels in space-constrained portable 97dB SNR (A-weighted) in Class AB mode applications. <0.05% THD+N 0.5W continuous into 4 (Class D) ReTune Mobile Parametric EQ with fully programmable <0.10% THD+N 2W continuous into 4 (Class D) coefficients is integrated for optimization of speaker 2.6W maximum peak power characteristics. Programmable dynamic range control is ReTune Mobile Parametric Equalizer also available for maximizing loudness, protecting speakers Fully programmable filter coefficients from clipping and preventing premature shutdown due to Programmable dynamic range controller battery droop. Boosts small signals to maximise loudness Protects against battery droop and clipping Digital input enables the power drivers to be located close to Speaker common mode boost the speakers in multi-channel systems without the need for Maximises power for a given SPKVDD/AVDD ratio troublesome long analogue connections. Location of the Low power FLL power drivers close to the speakers also removes the need Provides all necessary internal clocks for bulky and expensive class D filters and reduces PCB 32kHz to 27MHz input frequency track lengths, minimising emissions. The digital input can All common sample rates from 8kHz to 96kHz supported also help to minimise crosstalk to the speaker output Standard 2-wire, 3-wire, 4-wire and hardware control signal from high gain microphone inputs, enhancing stability modes and reducing the risk of howling during speakerphone 2 Data formats: LJ, RJ, I S, DSP, all with TDM support operation. Thermal shutdown interrupt Four control interface addresses and four-channel TDM are 4x4 COL package (0.45mm lead pitch) supported to allow multiple devices to be configured and Operating temperature range: -40C to 85C driven independently. APPLICATIONS The device is controlled via a standard 2-wire, 3-wire, or 4- wire control interface or by hardware control pins. Portable navigation systems Mobile phones Flat panel TVs BLOCK DIAGRAM WOLFSON MICROELECTRONICS plc Pre-Production, April 2009, Rev 3.0 To receive regular email updates, sign up at WM9081 Pre-Production TABLE OF CONTENTS DESCRIPTION ....................................................................................................... 1 FEATURES............................................................................................................. 1 APPLICATIONS ..................................................................................................... 1 BLOCK DIAGRAM ................................................................................................. 1 TABLE OF CONTENTS ......................................................................................... 2 PIN CONFIGURATION ........................................................................................... 4 COL28 ........................................................................................................................... 4 ORDERING INFORMATION .................................................................................. 4 PIN DESCRIPTION ................................................................................................ 5 ABSOLUTE MAXIMUM RATINGS ......................................................................... 6 RECOMMENDED OPERATING CONDITIONS ..................................................... 6 ELECTRICAL CHARACTERISTICS ...................................................................... 7 COMMON TEST CONDITIONS .................................................................................... 7 AUDIO DAC .................................................................................................................. 7 DIGITAL INTERFACES ................................................................................................. 9 CLOCKING AND TIMING .............................................................................................. 9 TYPICAL POWER CONSUMPTION .................................................................... 10 COMMON TEST CONDITIONS .................................................................................. 10 POWER CONSUMPTION MEASUREMENTS ............................................................ 10 TYPICAL PERFORMANCE DATA ....................................................................... 12 SPEAKER CLASS D INTO 4 + 10H ........................................................................ 12 SPEAKER CLASS D INTO 8 + 10H ........................................................................ 12 SIGNAL TIMING REQUIREMENTS ..................................................................... 13 SYSTEM CLOCK TIMING ........................................................................................... 13 AUDIO INTERFACE TIMING MASTER MODE ........................................................ 13 AUDIO INTERFACE TIMING SLAVE MODE ............................................................ 14 CONTROL INTERFACE TIMING 2-WIRE MODE .................................................... 14 CONTROL INTERFACE TIMING 3-WIRE MODE .................................................... 15 CONTROL INTERFACE TIMING 4-WIRE MODE .................................................... 16 DEVICE DESCRIPTION ....................................................................................... 18 INTRODUCTION ......................................................................................................... 18 CONTROL INTERFACE (SOFTWARE MODE) ........................................................... 19 CONTROL INTERFACE (HARDWARE MODE) .......................................................... 25 CONTROL WRITE SEQUENCER ............................................................................... 28 POWER ON RESET CIRCUIT .................................................................................... 31 DYNAMIC RANGE CONTROLLER (DRC) .................................................................. 33 RETUNE MOBILE PARAMETRIC EQUALIZER (EQ) .................................................. 39 DIGITAL TO ANALOGUE CONVERTER (DAC) .......................................................... 43 SIGNAL PATH CONTROL .......................................................................................... 46 ANALOGUE OUTPUTS ............................................................................................... 49 POP SUPPRESSION CONTROL ................................................................................ 51 DIGITAL AUDIO INTERFACE ..................................................................................... 53 DIGITAL AUDIO INTERFACE CONTROL ................................................................... 60 CLOCKING AND SAMPLE RATES ............................................................................. 65 THERMAL SHUTDOWN ............................................................................................. 74 INTERRUPTS.............................................................................................................. 75 REFERENCE VOLTAGES AND MASTER BIAS ......................................................... 77 POWER MANAGEMENT ............................................................................................ 79 PP, Rev 3.0, April 2009 w 2