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wau8822 data sheet rev 0 . 86 page 1 of 21 september 4 , 2008 wau8822 24 - bit stereo audio codec with speaker driver empoweraudio ? d escription the wau8822 is a low power, high quality codec for portable applications. in addition to precision 24 - bit stereo adc s and dac s, this device integrates a broad range of addit ional functions to simplify impleme ntation of complete audio system solutions . the wau88 22 includes drivers for speaker , headphone , and differential or stereo line outputs, and integrates preamps for stereo differential microphones, significantly reducing external components. advanced on - chip digital signal processing inc ludes a 5 - band equalizer, a 3 - d audio enhancer, a mixed - signal automatic level c ontrol for the microphone or line input through the adc, and a digital limiter function for the playback pat h . additional digital filtering options are available in the adc path, to simplify implementation of specific application requirements such as ?wind noise reduction?. the digital interface can operate as either a master or a slave. additionally, an inter nal fractional pll is available to generate accurate audio sample rate clocks for the codec derived from a wide range of commonly available system clock frequencies such as 12mhz and 13mhz. the wau8822 operates with analog supply voltages from 2.5v to 3. 6 v , while the digital core can operate at 1.65 v to conserve power. the loud speaker btl output pair and two auxiliary line outputs can operate using a 5v supply to increase output power capability , enabling the wau8822 to drive 1 watt into an external speaker . internal register controls enable flexible power saving modes by powering down sub - sections of the chip under software control. the wau8822 is specified for operation from - 40c to +85c, and is available with full automotive aec - /q100 & ts16949 qualifi cation. it is packaged in a cost - effective , space - saving 32 - lead qfn package. k ey features ? dac: 9 4 db snr and - 84db thd (a weighted) ? adc: 90db snr and - 80db thd (a weighted) ? int egrated btl speaker driver: 1 w into 8 ? integrated head - phone driver: 40 mw into 16 ? integrated programmable microphone amplifier ? integrated line input and line output ? on - chip pll ? integrated dsp with specific functions: ? 5 - band equalizer ? 3 - d audio enhancement ? automatic level control ? audio level limiter ? multiple filtering options ? standard audio interfaces: pcm and i 2 s ? serial control interface s with read/write capability ? supports audio sample rates f rom 8 k hz to 48 k hz a pplications ? personal media players ? smartphones ? personal navigation devices ? portable game players ? camcorders ? digita l still cameras ? portable tvs ? stereo bluetooth headsets i n p u t m i x e r r a d c d a c f i l t e r v o l u m e c o n t r o l l i m i t e r a d c f i l t e r v o l u m e c o n t r o l h i g h p a s s & n o t c h f i l t e r s 5 - b a n d e q 3 d i 2 s p c m d i g i t a l a u d i o i n t e r f a c e s e r i a l c o n t r o l i n t e r f a c e o u t p u t m i x e r p l l g p i o s t e r e o m i c r o p h o n e i n t e r f a c e l a d c l d a c r d a c m i c r o p h o n e b i a s h e a d p h o n e s / l i n e d r i v e r s b t l s p e a k e r w a u 8 8 2 2 y g l m i c p l m i c n r m i c p r m i c n l a u x i n r a u x i n l l i n r l i n l h p r h p a u x o u t 1 a u x o u t 2 l s p k o u t r s p k o u t
wau8822 d ata sheet rev 0. 86 page 2 of 21 september 4 , 2008 empoweraudio ? p inout part number dimension package package material WAU8822YG 5 x 5 mm 32 - qfn pb - free r l i n / g p i o 3 v s s d v d d b r s p k o u t m i c b i a s v r e f l s p k o u t 1 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 2 4 2 3 2 2 2 1 2 0 1 9 1 8 1 7 3 2 3 1 3 0 2 9 2 8 2 7 2 6 2 5 l m i c p l m i c n l l i n / g p i o 2 r m i c p r m i c n f s b c l k a d c o u t d a c i n m c l k v d d c c s b / g p i o 1 s c l k v s s s p k a u x o u t 2 a u x o u t 1 r a u x i n l a u x i n m o d e s d i o v d d a l h p r h p v s s a v d d s p k 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 2 4 2 3 2 2 2 1 2 0 1 9 1 8 1 7 3 2 3 1 3 0 2 9 2 8 2 7 2 6 2 5 w a u 8 8 2 2 y g 3 2 - l e a d q f n r o h s
wau8822 d ata sheet rev 0. 86 page 3 of 21 september 4 , 2008 empoweraudio ? pin descriptions pin # name type function ality 1 lmicp analog input left micp input (common mode) 2 lmicn analog input left micn input 3 llin/gpio2 analog input / digital i/o left line input / alternate left micp input / gpio2 4 rmicp analog input right micp input (common mode) 5 rmicn analo g input right micn input 6 rlin/gpio3 analog input / digital i/o right line input / alternate rig ht micp input / digital output in 4 - wire mode: must be used for gpio3 7 fs digital i/o digital audio dac and adc frame sync 8 bclk digital i/o digital audio bit clock 9 adcout digital output digital audio adc data output 10 dacin digital input digital audio dac data input 11 mclk digital input master clock input 12 vssd supply digital ground 13 vddc supply digital core supply 14 vddb supply digital buff er (input/output) supply 15 csb/gpio1 digital i/o 3 - wire mpu chip select or gpio1 multifunction input/output 16 sclk digital input 3 - wire mpu clock input / 2 - wire mpu clock input 17 sdio digital i/o 3 - wire mpu data input / 2 - wire mpu data i/o 18 mode digital input control interface mode selection pin 19 lauxin analog input left auxil i ary input 20 rauxin analog input right auxil i ary input 21 auxout1 analog output headphone ground / mono mixed output / line output 22 auxout2 analog output headphone g round / line output 23 rspkout analog output btl sp eaker positive output or right high current o utput 24 vssspk supply speaker ground ( ground pin for rspkout, lspkout, auxout2 and auxtout1 output drivers ) 25 lspkout analog output btl s peaker negative o utput or left high current o utput 26 vddspk supply speaker supply ( power supply pin for rspkout, lspkout, auxout2 and auxtout1 output drivers ) 27 vref reference decoupling for midrail reference voltage 28 vssa supply an alog ground 29 rhp analog outpu t headphone positive output / line output right 30 lhp analog output headphone negative output / line output left 31 vdda supply an alog power supply 32 micbias analog output microphone bias
wau8822 d ata sheet rev 0. 86 page 4 of 21 september 4 , 2008 empoweraudio ? figure 1 : wau8822 block diagram l d a c h p f a l c n o t c h f i l t e r l i m i t e r 5 b a n d e q 3 d a l c c o n t r o l r m i x l m i x r d a c l d a c r i n m i x r m i x l m i x l d a c l i n m i x r m a i n m i x e r l m a i n m i x e r a u x 1 m i x e r a u x 2 m i x e r l a d c m i x / b o o s t r a d c m i x / b o o s t r i n m i x l i n m i x r s p k s u b m i x e r a u x o u t 1 a u x o u t 2 l h p r h p l s p k o u t r s p k o u t l a u x i n r a u x i n l m i c n l m i c p l l i n r m i c n r m i c p r l i n v d d b v d d c v s s d v d d a v s s a v d d s p k v s s s p k b c l k f s a d c o u t d a c i n c o n t r o l i n t e r f a c e ( 2 - , 3 - a n d 4 - w i r e ) m c l k s c l k s d i o c s b / g p i o 1 m o d e v r e f r r v d d a m i c r o p h o n e b i a s m i c b i a s - 1 . 0 x + 1 . 5 x - 1 . 0 x + 1 . 5 x - 1 . 0 x + 1 . 5 x - 1 . 0 x + 1 . 5 x 1 9 2 1 4 1 3 1 2 3 1 2 8 2 6 2 4 1 3 5 4 6 2 7 2 0 3 2 2 1 2 2 3 0 2 9 2 5 2 3 a u d i o i n t e r f a c e ( p c m / i i s ) p l l 8 7 9 1 0 1 1 1 6 1 7 1 5 1 8 - + - + n o r m a l - 6 d b r d a c r a d c r a d c
wau8822 d ata sheet rev 0. 86 page 5 of 21 september 4 , 2008 empoweraudio ? e lectrical characteristics conditions : vddc = 1.8v, vdda = vddb = vccspk = 3.3v, mclk = 12.88mhz, t a = +25c, 1khz signal, fs = 48khz, 24 - bit audio data , 64x oversampling rate, unless otherwise stated. p arameter s ymbol c omments /c onditions m in t yp m ax u nits analog to digital converter (adc) full scale input signal 1 v infs pgabst = 0db pgagain = 0db 1.0 0 vrms dbv signal - to - noise ratio snr gain = 0db, a - weighted tbd 90 db total harmonic distortio n 2 thd +n input = - 3db fs in put - 80 tbd db channel separation 1khz input signal 1 0 3 db digital to analog converter (dac) driving rhp / lhp with 10k? / 50pf load full - scale output output boost disabled pga gains = 0db aux1bst = 1 aux2bst = 1 vdda / 3.3 v rms v rms output boost enabled pga gains = 0db aux1bst = 0 aux2bst = 0 1.5 * ( vdda / 3.3) signal - to - noise ratio snr a - weighted 88 94 db total harmonic distortio n 2 thd +n r l = 10k?; full 96 db output mixers maximum pga gain into mixer +6 db minimum pga gain into mixer - 15 db pga gain step into mixer guaranteed monotonic 3 db speaker output ( rspkout / lspkout with 8 bridge - tied - load) full scale output 4 spkbst = 1 vccs pk / 3.3 v rms spkbst = 0 (vccspk / 3.3) * 1.5 v rms total harmonic distortion 2 thd +n p o = 200mw , vddspk=3.3v *63 db p o = 320mw , vddspk = 3.3v - 64 db p o = 500mw, vddspk = 5v - 60 db p o = 860mw, vddspk = 5v - 61 db signal - to - noise ratio snr vddspk = 3.3v 91 db vddspk=5v 90 db power supply rejection ratio (50hz - 22khz) psrr 81 db vddspk = 5v (boost) 72 db analog outputs ( rhp / lhp ; rspkout / lspkout ) maximum programmable gain +6 db minimum programmable gain - 57 db programmable gain step size guaranteed monotonic 1 db mute attenuation 1khz full scale signal 85 db
wau8822 d ata sheet rev 0. 86 page 6 of 21 september 4 , 2008 empoweraudio ? electrical characteristics , contd. conditions: vddc = 1.8v, vdda = vddb = vccspk = 3.3v, mclk = 12. 2 88mhz, t a = +25c, 1khz signal, fs = 48khz, 24 - bit audio data, unless otherwise stated. parameter symbol c omments/c onditions min typ max units headphone output ( rhp / lhp with 32 load) 0db full scale output voltage avdd / 3.3 v rms signal - to - noise ratio snr a - weighted 92 db total harmonic distortion 2 thd +n r l = 16?, p o = 20mw, vdda = 3.3v 80 db r l = 32?, p o = 20mw, vdda = 3.3v 85 db auxout1 / auxout2 with 10k? / 5 0pf load full scale output aux1bst = 0 aux2bst = 0 vddspk / 3.3 v rms aux1bst = 1 aux2bst = 1 (vddspk / 3.3) * 1.5 v rms signal - to - noise ratio snr 87 db total harmonic distortio n 2 thd +n - 83 db channel separation 1khz signal 99 db power su pply rejection ratio (50hz - 22khz) psrr 53 db vddspk = 5v (boost) 56 db microphone inputs ( l micp , l micn , r micp , r micn , llin, rlin ) and programmable gain amplifier (pga) full scale i nput signal 1 pgabst = 0db pgagain = 0db 1.0 0 vrms dbv prog rammable gain - 12 35.25 db programmable gain step size guaranteed monotonic 0.75 db mute attenuation 120 db input resistance inverting input pga gain = 35.25db pga gain = 0db pga gain = - 12 db non - inverting input 1.6 4 7 75 94 k ? k? k? k? input boost mixer gain boost boost disabled boost enabled 0 20 db db gain range llin / rlin or lauxin / rauxin to boost/mixer - 12 6 db gain step size to boost/mixer 3 db auxiliary analog inputs (lauxin, rauxin) full scale input signal 1 gain = 0db 1.0 0 vrms dbv input resistance aux direct - to - out path, only input gain = +6.0 db input gain = 0.0db input gain = - 1 2db 2 0 40 159 k? k? k?
wau8822 d ata sheet rev 0. 86 page 7 of 21 september 4 , 2008 empoweraudio ? e lectrical characteristics , contd. conditions: vddc = 1.8v, vdda = vddb = vccspk = 3.3v, mclk = 12.88mhz, t a = +25c, 1khz signal, fs = 48khz, 24 - bit audio data, unless otherwise stated. parameter symbol co mments/ co nditions min typ max units automatic level control (alc) & limiter: adc path only target r ecord l evel - 22.5 - 1.5 db fs programmable gain - 12 35.25 db gain h old t ime 3 t hold doubles every gain step, with 16 steps total 0 / 2 . 67 / 5 . 33 / 3 t dcy alc mode alc = 0 4 / 8 / 16 / / / / 3 t atk alc mode alc = 0 1 / 2 / 4 / / / / microphone bias bias voltage v micbias see f igure 3 0.50, 0.60,0.65, 0.70, 0.75, 0.85, or 0.90 vdda vdda bias current source i micbias 3 ma output noise voltage v n 1khz to 20khz 1 4 nv/hz digital input/output input high level v il 0.7 * vddc v input low level v ih 0.3 * vddc v output high level v oh i load = 1ma 0.9 * vddc v output low level v ol i l o ad = - 1ma 0.1 * vddc v input capacitance 10 pf notes 1. full scale is relative to the magnitud e of vdd a and can be calculated as fs = vdd a /3.3. 2. distortion is measured in the standard way as the combined quantity of distortion products plus noise. the signal level for distortion measurements is at 3db below full scale, unless otherwise noted. 3. time values scale proportionally with mclk. complete descriptions and definitions for these values are contained in the detailed descriptions of the alc functionality. 4. with default register settings, spkvdd should be 1.5xvdda (but not exceeding maximum recomme nded operating voltage) to optimize available dynamic range in the auxout1, auxou2, rspkout, and lspkout outputs stages.
wau8822 d ata sheet rev 0. 86 page 8 of 21 september 4 , 2008 empoweraudio ? a bsolute maximum ratings c ondition min max units v ddb , v ddc , v dda supply voltages - 0.3 +3 .9 0 v v ddspk supply voltage ( default regis ter configuration) - 0.3 +5.8 0 v v ddspk supply voltage ( optional low voltage configuration) - 0.3 +3. 9 0 v core digital input voltage range v ssd C 0.3 v ddc + 0.30 v buffer digital input voltage range v ssd C 0.3 v ddb + 0.30 v analog input voltage range v ssa C 0.3 v dda + 0.30 v industrial operating temperature - 40 +85 c storage temperature range - 65 +150 c caution: do not operate at or near the maximum ratings listed for extended periods of time. exposure to such conditions may adversely influence p roduct reliability and result in failures not covered by warranty. o perating conditions condition symbol min typical max units digital supply range (core) v ddc 1. 65 3.60 v digital supply range (buffer) v ddb 1. 65 3.60 v analog suppl y range v dda 2.50 3 .60 v speaker supply ( spk bst =0) v ddspk 2.50 5.50 v speaker supply ( spk bst =1) v ddspk 2.50 5.50 v ground v ssd v ssa v ssspk 0 v 1. v dda must be v ddc . 2. v ddb must be v ddc .
wau8822 d ata sheet rev 0. 86 page 9 of 21 september 4 , 2008 empoweraudio ? 1 general description the wau8822 is a stereo device with identical left and right channels that share common support elements. additionally, the right channel auxiliary output path includes a dedicated sub mixer th at s upports mixing the right auxiliary input directly into the right speaker output driver. this enables the right speaker channel to output audio that is not present on any other output. 1.1.1 analog inputs all inputs, except for the wide range programmable am plifier (pga), have available analog input gain conditioning of - 15db through +6db in 3db steps. all inputs also have individual muting functions with excellent channel isolation and off - isolation from all outputs. all inputs are suitable for full qualit y, high bandwidth signals. each of the left - right stereo channels includes a low noise differential pga amplifier , programmable for high - gain input. this may be used for a microphone level through line level so urce. gain may be set from +35.2 5db through - 12db at the analog difference - amplifier type programmable ampli fi er input stage. a separate additional 20db analog gain is available on this input path, between the pga output and adc mixer input. the output of the adc mixer may be routed to the adc and/or analog bypass to the analog output sections. each channel also has a line level input. this input may be routed to the input pga, and/or directly to the adc input mixer. e ach channel has a separate additional auxiliary input. this is a line level input which may be routed the adc input mixer and/or directly to the analog output mixers. 1.1.2 analog outputs there are six high current analog audio outputs. these are very flexible outputs that can be used individually or in stereo pairs for a wide range of end uses. however, these outputs are optimized for specific functions and are described in this section using the functional names that are applicable to those optimized functions. each output receives its signal source from built - in analog output mixers . these mixers enable a wide range of signal combinations, including muting of all sources. additionally, each output has a programmable gain function, output mute function, and output disable function. the rhp and lhp headphone outputs are optimized for driving a stereo pair of he adphones, and are powered from the main analog voltage supply rail, vdda. these outputs may be coupled using traditional dc blocking s eries capacitors . alter n atively, these may be configured in a no - capacitor dc coupled design using a virtual ground at ? vdda provided by an auxout analog output. the auxout1 and auxout2 analog outputs are powered from the vddspk supply rail and vssspk ground return path . the supply rail may be the same as vdda , or may be a separate voltage up t o 5 .5 vdc. this higher voltage enables these o utputs to have an increased output voltage range and greater output power capability. the rspkout and lspkout louds peaker outputs are powered from the vddspk power supply rail and vssgnd ground return path . ls pkout receives its audio signal via an additional submixer. this submixer supports combining a traditional alert sound (from the rauxin input) with the right channel headphone output mixer signal. this submixer also provides the signal invert function t hat is necessary for the normal btl ( bridge tied load ) configuration used to drive a high power external loudspeaker. alternatively, each loud speaker output may be used individually as a separate high current analog output driver.
wau8822 d ata sheet rev 0. 86 page 10 of 21 september 4 , 2008 empoweraudio ? 1.1.3 adc, dac, and digital s ignal processing each left and right channel has an independent high quality adc and dac associated with it. these are high performance , 24 - bit delta - sigma converters that are suitab le for a very wide range of applications. the adc and dac functions are e ach individually supported by powerful analog mixing and routing. the adc output may be routed to the digital output path and/or to the input of the dac in a digital passthrough mode. the adc and dac blocks are also supported by advanced digital signal p rocessing subsystems that enable a very wide range of programmable signal conditioning and signal optimizing functions. all digital processing is with 24 - bit precision, as to minimize processing artifacts and maximize the audio dynamic r ange supported by the wau8822. the adcs are supported by a wide range, mixed - mode automatic level control (alc), a high pass filter, and a notch filter. all of these features are optional and highly programmable. the hig h pass filter function is intend ed for dc - blocking o r low frequency noise reduction, such as to reduce unwanted ambient noise or wind noise on a microphone input. the notch filter may be programmed to greatly reduce a specific frequency band or frequency , such as a 50hz, 60hz, or 217hz unwanted nois e. th e dacs are supported by a programmable limiter/drc (dynamic range compressor). this is useful to optimize the output level for various applications and for use with small loudspeakers. this is an optional feature that may be programmed to limit the maxim um output level and/or boost an output level that is too small. digital signal processing is also provided for a 3d audio enhancement function , and for a 5 - band equalizer. these features are optional , and are programmable over wide ranges. this pair of d igital processing features may be applied jointly to either the adc audio path or to the dac audio path, but not to both paths simultaneously. 1.1.4 voltage reference and microphone bias built - in power management includes a high stability voltage reference . thi s is used as an internal reference, and to generate a high quality, programmable microphone bias supply voltage that is well isolated from the supply rails. this microphone bias supply is suitable for both conventional electret (ecm) type microphone, and to power the newer mems all - silicon type microphones. 1.1.5 d igital interfaces command and control of the device is accomplished using a 2 - wire/3 - wire /4 - wire serial control interface. this is a simple, but highly flexible interface that is compatible with many commonly used command and control serial data protocols and host drivers. digital audio input/output d ata streams are transferred to and from the device separately from command and control. the digital a udio data interface supports either i2s or pcm audio data protocols, and is compatible with commonly used industry standard devices that follow either of these two serial data formats. 1.1.6 c lock requirements the clocking signals required for the audio signal processing, audio data i/o, and control logic may be provided externally, or by optional operation of a built - in pll (phase locked loop) . an external master clock (mclk) signal must be active for analog audio logic paths to align with control register updates, and is required as the reference clock input fo r the pll, if the pll is used. the pll is provided as a low cost, zero external component count optional method to generate required clocks in almost any system. the pll is a fractional - n divider type design, which enables generating accurate desired audi o sample rates derived from a very wide range of commonly available system clocks. the frequency of the system clock provided as the pll reference frequency may be any stable frequency in the range between 8mhz and 33mhz. because the fractional - n multipli cation factor is a very high precision 24 - bit value, any desired sample rate supported by the wau8822 can be generated with very high accuracy, typically limited by the accuracy of the external reference frequency. reference clocks and sample rates outsid e of these ranges are also possible, but may involve performance tradeoffs and increased design verification.
wau8822 d ata sheet rev 0. 86 page 11 of 21 september 4 , 2008 empoweraudio ? 2 application information 2.1 typical application schematic figure 2 : schematic with recommended external components for t ypical application with ac - coupled headphones and stereo electret (ecm) style microphones. note 1: all non - polar capacitors are assumed to be low esr type parts, such as with mlc construction or similar. if capacitors are not low esr, additional 0.1ufd an d/or 0.01ufd capacitors may be necessary in parallel with the bulk 4.7ufd capacitors on the supply rails. note 2: load resistors to ground on outputs may be helpful in some applications to insure a dc path for the output capacitors to charge/discharge to t he desired levels. if the output load is always present and the output load provides a suitable dc path to ground, then the additional load resistors may not be necessary. if needed, such load resistors are typically a high value, but a value dependent u pon the application requirements. note 3: to minimize pops and clicks, large polarized output capacitors should be a low leakage type. note 4: depending on the microphone device and pga gain settings, common mode rejection can be improved by choosing the r esistors on each node of the microphone such that the impedance presented to any noise on either microphone wire is equal. vdda rspkout c 4 4 . 7 uf c 3 4 . 7 uf c 2 4 . 7 uf c 1 4 . 7 uf vddspk vss c 12 1 uf 13 14 9 10 7 8 11 15 16 17 18 23 29 26 31 25 wau 8822 v ddb v dda v ddc v ssd v ssa mclk adcout dacin bclk vref micbias rhp csb / gpio 1 sclk sdio lspkout rmicn rmicp mode fs v ddspk v ssspk vddc vddb vss c 9 4 . 7 uf c 10 4 . 7 uf c 8 220 uf rlin / gpio 3 llin / gpio 2 30 lhp c 7 220 uf analog inputs : no connection if not used ecm electret type mic c 14 1 uf c 13 1 uf lmicn lmicp c 16 1 uf c 15 1 uf lauxin rauxin r 1 1000 ohm r 4 1200 ohm r 2 1000 ohm r 3 1200 ohm ecm electret type mic r 5 220 k ohm vss vddb jack switch detection example vss sleeve on 3 . 5 mm audio connector right headphone ring on 3 . 5 mm stereo connector left headphone tip on 3 . 5 mm stereo connector + + auxout 1 auxout 2 c 5 1 uf c 6 1 uf optional vss optional vss 19 20 2 1 5 4 32 27 6 28 24 12 21 22 3 r 7 r 6 r 8 r 9 c 11 1 uf
wau8822 d ata sheet rev 0. 86 page 12 of 21 september 4 , 2008 empoweraudio ? 2.2 power consumption wau8822 has flexible power management capability which allows sections not being used to be powered down, to dra w minimum current in battery - powered applications . table C shows typical power consumption in different operating conditions. mode conditions vdda = 3v vddc = 1.8v vddb = 3v total power ma ma ma mw off tbd tbd tbd tbd sleep vref off, no clocks, 0.1 0.001 0.0003 0.15 vref maintained @ 75k, no clocks, vref maintained @ 300k, no clocks, vref maintained @ 5k, no clocks, 16 hp, 44.1khz, pll on, sine wave 16 hp, 44.1khz, quiescent 16 hp, 44.1khz, white noise 16 hp, 44.1khz, sine wave 16 hp, 44.1khz,
wau8822 d ata sheet rev 0. 86 page 13 of 21 september 4 , 2008 empoweraudio ? 2.3 supply currents of specific blocks wau88 22 can be programmed to enable / disable various analog blocks individually , and the cur rent to some of the major blocks can be reduced with minimum impact on performance. the table below shows the change in current consumed with different register settings . sample rate settings will vary current consumption of v ddc supply , which draws cons umes approximately 4ma @ 1.8v and fs = 48 k hz. lower sampling rates draw lower current. register function bit vdda current increase/ decrease when enabled dec hex 1 01 power management 1 refimp[1:0] +100a for 80k and 300k +260a for 3k +100a +600a +540a +200a +200a +140a +300a +300a +650a +650a +800a +800a +250a +250a +225a +225a 600a with no snr decrease @ 8khz
wau8822 d ata sheet rev 0. 86 page 14 of 21 september 4 , 2008 empoweraudio ? 3 appendix a : d igital filter characteristics p arameter c onditions m in t yp m ax u nits adc filter passband +/ - 0 .015db 0 0.454 f s - 6db 0.5 fs passband ripple +/ - 0.0 1 5 db stopband 0.546 fs stopband attenuation f > 0.546*fs - 60 db group delay 28.25 1/fs adc high pass filter high pass filter corner frequency - 3db 3.7 hz - 0.5db 10.4 hz - 0.1db 21.6 hz dac filter passband +/ - 0.035db 0 0.454 fs - 6db 0.5 fs passband ripple +/ - 0.035 db stopband 0.546 fs stopband attenuation f > 0.546*fs - 55 db group delay 28 1/fs table 3 : digital filter char a cteristics terminology 1. stop band attenuation (db) C the degree to which the frequency spectrum is attenuated (outside audio band) 2. pass - band ripple C any variation of the frequency response in the pass - band region 3. note that this delay applies only to the filters and does not include other latencies, such as fr om the serial data interface
wau8822 d ata sheet rev 0. 86 page 15 of 21 september 4 , 2008 empoweraudio ? figure 3 : dac filter frequency response figure 4 : dac filter ripple figure 5 : adc filter frequency response figure 6 : adc filter ripple
wau8822 d ata sheet rev 0. 86 page 16 of 21 september 4 , 2008 empoweraudio ? figure 7 : adc highpass filter response, audio mode figure 8 : adc highpass filter response, hpf e nabled, fs = 48 k hz figure 9 : adc highpass filt er response, hpf enabled, fs = 24 k hz figure 10 : adc highpass filter response, hpf enabled, fs = 12 k hz 10 20 30 hz d b r 0 - 2 - 4 - 6 100 300 500 hz 700 900 100 300 500 hz 700 900 d b r 0 - 80 - 20 - 40 - 60 d b r 0 - 80 - 20 - 40 - 60 100 300 500 hz 700 900 100 300 500 hz 700 900 d b r 0 - 80 - 20 - 40 - 60 d b r 0 - 80 - 20 - 40 - 60 100 300 500 hz 700 900 100 300 500 hz 700 900 d b r 0 - 80 - 20 - 40 - 60 d b r 0 - 80 - 20 - 40 - 60
wau8822 d ata sheet rev 0. 86 page 17 of 21 september 4 , 2008 empoweraudio ? figure 11 : eq band 1 gains for lowest cut - off frequency figure 12 : eq band 2 peak filter gains for lowest cut - off frequency with eq2bw = 0 figure 13 : eq band 2, eq2bw = 0 versus eq2bw = 1 figure 14 : eq band 3 peak filter gains for lowest cut - off frequency with eq3bw = 0 d b r +15 +5 0 - 5 - 10 - 15 +10 20 20k 50 100 200 500 1k 2k 5k 10k hz d b r +15 +5 0 - 5 - 10 - 15 +10 +15 +5 0 - 5 - 10 - 15 +10 20 20k 50 100 200 500 1k 2k 5k 10k hz 20 20k 50 100 200 500 1k 2k 5k 10k hz d b r +15 +5 0 - 5 - 10 - 15 +10 +15 +5 0 - 5 - 10 - 15 +10 20 20k 50 100 200 500 1k 2k 5k 10k hz 20 20k 50 100 200 500 1k 2k 5k 10k hz 20 20k 50 100 200 500 1k 2k 5k 10k hz 20 20k 50 100 200 500 1k 2k 5k 10k hz +15 +5 0 - 5 - 10 - 15 +10 d b r +15 +5 0 - 5 - 10 - 15 +10 +15 +5 0 - 5 - 10 - 15 +10 d b r +15 +5 0 - 5 - 10 - 15 +10 d b r +15 +5 0 - 5 - 10 - 15 +10 +15 +5 0 - 5 - 10 - 15 +10 d b r 20 20k 50 100 200 500 1k 2k 5k 10k hz 20 20k 50 100 200 500 1k 2k 5k 10k hz
wau8822 d ata sheet rev 0. 86 page 18 of 21 september 4 , 2008 empoweraudio ? figure 15 : eq band 3, eq3bw = 0 versus eq3bw = 1 figure 16 : eq band 4 peak filter gains for lowest cut - off frequencies with eq4bw = 0 figure 17 : eq band 4, eq4bw = 0 versu s eq4bw =1 figure 18 : eq band 5 gains for lowest cut - off frequency +15 +5 0 - 5 - 10 - 15 +10 d b r 20 20k 50 100 200 500 1k 2k 5k 10k hz +15 +5 0 - 5 - 10 - 15 +10 d b r +15 +5 0 - 5 - 10 - 15 +10 +15 +5 0 - 5 - 10 - 15 +10 d b r 20 20k 50 100 200 500 1k 2k 5k 10k hz 20 20k 50 100 200 500 1k 2k 5k 10k hz t +15 +5 0 - 5 - 10 - 15 +10 d b r t t +15 +5 0 - 5 - 10 - 15 +10 d b r +15 +5 0 - 5 - 10 - 15 +10 +15 +5 0 - 5 - 10 - 15 +10 d b r +15 +5 0 - 5 - 10 - 15 +10 d b r +15 +5 0 - 5 - 10 - 15 +10 +15 +5 0 - 5 - 10 - 15 +10 d b r 20 20k 50 100 200 500 1k 2k 5k 10k hz 20 20k 50 100 200 500 1k 2k 5k 10k hz +15 +5 0 - 5 - 10 - 15 +10 d b r 20 20k 50 100 200 500 1k 2k 5k 10k hz +15 +5 0 - 5 - 10 - 15 +10 d b r +15 +5 0 - 5 - 10 - 15 +10 +15 +5 0 - 5 - 10 - 15 +10 d b r 20 20k 50 100 200 500 1k 2k 5k 10k hz 20 20k 50 100 200 500 1k 2k 5k 10k hz
wau8822 d ata sheet rev 0. 86 page 19 of 21 september 4 , 2008 empoweraudio ? 4 appendix d : register overview dec hex name bit 8 bit 7 bit 6 bit5 bit 4 bit 3 bit 2 bit 1 bit 0 default 0 0 0 software reset reset (software) 1 0 1 power ma nagement 1 dcbufen aux1mxen aux2mxen pllen micbiasen abiasen iobufen refimp 000 2 0 2 power management 2 r hpen n hpen sleep rbsten lbsten rpgaen lpgaen radcen ladcen 000 3 0 3 power management 3 auxout1en auxout2en l spken r spken biasgen rm i xen lm i xen rdace n ldacen 000 general audio controls 4 0 4 audio interface bclkp lrp wlen aifmt dacphs adcphs mono 050 5 0 5 companding reserved cmb8 daccm adccm passthr u 000 6 0 6 clock control 1 clkm mclksel bclksel reserved clkioen 140 7 0 7 clock control 2 4wspien reserved smplr sclken 000 8 0 8 gpio reserved gpio1pll gpio1pl gpio1sel 000 9 0 9 jack detect 1 jckmiden jckden jckdio reserved 000 10 0 a dac control reserved softmt reserved dacos automt rdacpl ldacpl 000 11 0 b left dac volume l dacvu ldacgain 0ff 12 0 c right dac volume r dacvu rdacgain 0ff 13 0 d jack detect 2 reserved jckdoen1 jckdoen0 000 14 0 e adc control hpfen hpfam hpf adcos reserved radcpl ladcpl 100 15 f left adc volume l adcvu ladcgain 0ff 16 10 right adc volume r adcvu radcgain 0ff 17 11 reser ved equalizer 18 12 eq1 - low cutoff eqm reserved eq1cf eq1gc 12c 19 13 eq2 - peak 1 eq2bw reserved eq2cf eq2gc 02c 20 14 eq3 - peak 2 eq3bw reserved eq3cf eq3gc 02c 21 15 eq4 - peak3 eq4bw reserved eq4cf eq4gc 02c 22 16 eq5 - high cutoff reserved eq5cf eq5gc 02c 23 17 reserved dac limiter 24 18 dac limiter 1 daclimen daclimdcy daclimatk 032 25 19 dac limiter 2 reserved daclimthl daclimbst 000 26 1a reserved notch filter 27 1b notch filter 1 nfcu 1 nfcen nfca0[13:7] 000 28 1c notch filter 2 nfcu 2 rese rved nfca0[6:0] 000 29 1d notch filter 3 nfcu 3 reserved nfca1[13:7] 000 30 1e notch filter 4 nfcu 4 reserved nfca1[6:0] 000 31 1f reserved alc and noise gate control 32 20 alc control 1 alc en reserved alcmxgain alcmngain 038 33 21 alc control 2 reser ved alcht alcsl 00b 34 22 alc control 3 alcm alcdcy alcatk 032 35 23 noise gate reserved alctblsel alcnen alcnth 01 0 phase lock ed loop 36 24 pll n reserved pllmclk plln 008 37 25 pll k 1 reserved pllk[23:18] 00c 38 26 pll k 2 pllk[17:9] 093 39 27 pl l k 3 pllk[8:0] 0e9 40 28 mic bias mode reserved micbiasm 000 miscellaneous 41 29 3d control reserved 3ddepth 000 42 2a reserved 43 2b right speaker submix reserved rmix mut rsubbyp rauxrsubg rauxsmut 000 44 2c input control micbiasv rlin r pga r mic n r pga r mic p rpga reserved llin l pga l mic n lpga l mic p lpga 033 45 2d left input pga gain l pgau lpgazc lpgamt lpgagain 010 46 2e right input pga gain r pgau rpgazc rpgamt rpgagain 010 47 2f left adc boost lpgabst reserved lpgabstgain reserved lauxbstgain 100 48 30 right adc boost rpgabst reserved rpgabstgain spkstage rauxbstgain 100 49 31 output control reserved ldacrmx rdaclmx aux1bst aux2bst spkbst tsen aoutimp 002 50 32 left mixer lauxmxgain lauxlmx lbypmxgain lbyplmx ldaclmx 001 51 33 right mixer rauxmxga in rauxrmx rbypmxgain rbyprmx rdacrmx 001 52 34 lhp volume l hpvu l hpzc lhpmute l hpgain 039 53 35 rhp volume r hpvu r hpzc rhpmute r hpgain 039 54 36 lspkout volume l spkvu l spkzc lspkmute l spkgain 039 55 37 rspkout volume r spkvu r spkzc rspkmute r spkgain 03 9 56 38 aux 2 mixer reserved auxout2mt reserved aux1mix> 2 ladc aux2 lmix aux2 ldacaux2 001 57 39 aux 1 mixer reserved auxout1mt aux1half lmix aux1 ldacaux1 radcaux1 rmix aux1 rdacaux1 001 58 3a power management 4 lpdac lpipbst lpadc lpspkd micbiasm regvolt ib adj 000 pcm time slot and adcout impedance option control 59 3b left time slot ltslot[8:0] 000 60 3c misc pcmtsen tri pcm8bit puden pudpe pudps reserved rtslot[9] ltslot[9] 02 0 6 1 3d right time slot rtslot[8:0] 000 silicon revision and device id 62 3e device revision # reserved rev xxx 6 3 3 f device id id xxx
wau8822 d ata sheet rev 0. 86 page 20 of 21 september 4 , 2008 empoweraudio ? 5 package dimensions 32 - lead plastic qfn ; 5x5mm 2 , 1.0mm thickness, 0. 5 mm lead pitch
wau8822 d ata sheet rev 0. 86 page 21 of 21 september 4 , 2008 empoweraudio ? 6 o rdering information nuvoton part number description v ersion history version date page description a0.0 february, 2008 na preliminary revision a0.6 may 2008 na preliminary revision a0.8 6 september 2008 na preliminary revision table 4 : version history important notice nuvoton products are not designed, intended, authorized or warranted for use as components in systems or equipment intended for surgical implantation, atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, or for other applications intended to support or sustain life. furthermore, nuvoton products are not intended for applications wherein failure of nuvoton products could result or lead to a situation wherein personal injury, death or severe property or environmental damage could occur. nuvoton customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify nuvoton for any damages resulting from such improper use or sales. package type: y = 32 - pin qfn package wau8822 y g package material: g = pb - free package

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