analog products division 561 e. elliot road #175 chandler, az 85225 tel: (480) 539-2900. fax: (602) 431-2288 www.protekanalog.com PA4201 pop-up-noise killer 95020 rev.1. 06/09 patent pending not for use in life support systems features ? extremely low supply current (<1 a). ? >45db mute attenuation. ? shunt operation. ? softmute during normal operation. ? built-in expansion capability, softmute out for driving additional channels. ? instantaneous. power-up and power-down muting. ? esd protected outputs. ? 1.5v to 2.7v supply operation. ? compact 2 x 2 x 0.6mm 8 lead dfn. applications ? cell phones ? pda?s ? portable dvd players ? portable mp3 players ? notebook audio ? set-top boxes ? digital video recorders ? lcd tvs ? home theater systems pin layout general description PA4201 ( punk ) is a low power (i cc < 1 a) monolithic cmos mixed signal device. punk?s primary function is to control power supply transition noise in audio circuits and systems. punk boasts several features that make it a ?one of a kind? product on the market. most prominent is the feature that allows the designer to implement softmute on an audio line during normal operation. punk is an exceptional product for multi-channel devices as it is capable of expanding the softmute operation into systems s u c h a s dolby ? 5.1, dts?. punk requires few external components for its operation, working from low to medium supply voltages of 1.5v to 2.7v. on power-up and power-down the audio inputs to succeeding amplifiers are switched to a convenient low impedance voltage rail. muting the amplifiers, preventing the audible pop, that is normally heard in the headset. punk operates as a passive shunt device. so the designer does not have to worry about the punk introducing any kind of noise or distortion into the system. while consuming less than 1 a of supply current punk provides more than 45db of mute attenuation at the audio lines. punk is equipped with esd (human body model) protection circuitry on the outputs. punk is available as an 8l low profile 0.6mm dfn package and is specified for operation over the -40 c to +85c temperature range. typical application circuit 95020 1 5 8 4 2 3 7 6 mute control 8 2 3 7 1 4 5 6 c1 0.1f c3 4.7f c4 0.22f c5 0.22f r2 220 ? r4 220 ? r3 10k ? r5 10k ? PA4201 2x2x0.6mm mute1 mute2 right input left input left output right output vcc vcc smuteout
analog products division 561 e. elliot road #175 chandler, az 85225 tel: (480) 539-2900. fax: (602) 431-2288 www.protekanalog.com PA4201 pop-up-noise killer 95020 rev.1. 06/09 patent pending not for use in life support systems pin out pin name function 1 vcc positive power supply. 1.5v to 2.7v 10% 2 rcs power on mute delay resistor-capacitor connection 3 cext soft mute delay capacitor 4 smuteout soft mute out for multiple channels 5 mute1 open drain output of nfet 1 6 mute2 open drain output of nfet 2 7 gnd ground 8 mutecont mute control signal from microprocessor absolute maximum ratings sustained operation at or above the following ratings is not re commended. catastrophic and irreversible damage will occur to th e device at or above these ratings. symbol description rating v x voltage at any pin -0.3 to 7.0+ 0.3 v i x current at any pin 500ma t a ambient temperature 150 c t s storage temperature 200 c t sol soldering temperature 260 c
analog products division 561 e. elliot road #175 chandler, az 85225 tel: (480) 539-2900. fax: (602) 431-2288 www.protekanalog.com PA4201 pop-up-noise killer 95020 rev.1. 06/09 patent pending not for use in life support systems recommended operating conditions: dc operating conditions unless otherwise specified, v dd =3 10%, t a = ambient temperature = 25 c . limit symbol parameter condition min typical max unit v dd power supply normal operation 1.5 3.0 v i dd supply current normal operation 1 a t a ambient temperature normal operation -40 85 oc v oh logic high o/p voltage i oh =100 a v dd -0.1 v v ol logic low o/p voltage i ol =-100 a 0.2 v v ih logic high i/p voltage i ih =1 a v dd -0.3 v v il logic low i/p voltage i il =1 a 0.3 v v dd = 2.7v, v dfet = 0.4v 0.88 1.1 r on fet on resistance v cc = 5.5v, v dfet = 0.4v 0.55 0.66 ? r flat(on) on resistance flatness over input voltage range 3.55 m ? thd total harmonic distortion rl = 32 ? , 30mw, f = 1khz .020 % x talk crosstalk (on) f = 20khz -100 db v sig analog signal range normal operation 0.7 v rms mute operating conditions limit symbol parameter condition min typical max unit m offd mute release delay mute control =vil set by ext. rc network at rcs pin 10 ms m std soft mute fall/rise time mute control transitions to vih. set by ext. capacitor cext 1 ms m pdel * mute on delay mute control signal, low to high transition 1 s n fetv * nfet open drain volt 7.0 v * guaranteed by design
analog products division 561 e. elliot road #175 chandler, az 85225 tel: (480) 539-2900. fax: (602) 431-2288 www.protekanalog.com PA4201 pop-up-noise killer 95020 rev.1. 06/09 patent pending not for use in life support systems turn on time c ext f t softmute in ms 0.1 36.03 0.2 71.06 0.3 97.4 0.4 110.05 0.5 117.2 capacitive load max cap load @ smuteout v dd t ms c ext nf 5.5 18 20 3.3 20 15 2.7 20 15
analog products division 561 e. elliot road #175 chandler, az 85225 tel: (480) 539-2900. fax: (602) 431-2288 www.protekanalog.com PA4201 pop-up-noise killer 95020 rev.1. 06/09 patent pending not for use in life support systems theory of operation startup during startup, the power supply ramps from 0v to vcc. this time is usually in excess of 20ms. as soon as this change in voltage is sensed, punk latches the mute controller outputs to high, thus ?muting? the lines. this is the startup operation (f igure 1). the duration for which the controller outputs are latched high can be controlled by an external rc circuit. when the voltage at this rc pin reac hes a certain threshold, the mute controller releases the lines (gate voltage is low) and normal operation starts. shutdown during shutdown, the reverse process happens. as the power supply reaches the threshold on its way down, the mute controller again latches the outputs to high, thus ?muting? the lines (figure 2). this muting prevents unwanted signal spikes from getting to the power amplifiers. however, for optimal performance, it is suggested to mute the lines using the mutecont signal before power down. this process will ensure that the pop noise involved during shutdown is diminished softmute during normal operation, punk is in off state. but if there arises a situation when the audio lines need to be muted, the designer can do this by asserting the mutecont signal to high. this will initiate a softmute sequence (figure 3). when the mutecont signal is asserted, the mute controller gradually ramps the control voltages in a ?soft? fashion so as to provide a soft mute operation. the mute delay is fully controllable by the designer by using an external capacitor at cext. typical values of cext are between 0.1 f and 0.5 f. the reverse happens when the mutecont signal is released. this operation is explained in detail in the application circuit section. figure 1: startup pop-noise reduction figure 2: shutdown pop-noise reduction figure 3: soft mute operation
analog products division 561 e. elliot road #175 chandler, az 85225 tel: (480) 539-2900. fax: (602) 431-2288 www.protekanalog.com PA4201 pop-up-noise killer 95020 rev.1. 06/09 patent pending not for use in life support systems figure 4: startup pop-noise without punk figure 5: shutdown pop-noise without punk figure 6: startup pop-noise with punk figure 7: shutdown pop-noise with punk figure8: audio mute enable figure 9: audio mute disable
analog products division 561 e. elliot road #175 chandler, az 85225 tel: (480) 539-2900. fax: (602) 431-2288 www.protekanalog.com PA4201 pop-up-noise killer 95020 rev.1. 06/09 patent pending not for use in life support systems package dimensions and measurements PA4201dn millimeters dim min typ min p1 1.95 2.00 2.05 p2 1.95 2.00 2.05 p3 0.50 0.60 0.70 l1 0.23 0.25 0.27 l2 0.33 0.35 0.40 l3 0.02 0.02 0.02 p 0.50 0.50 0.50 g1 1.50 1.60 1.70 g2 0.60 0.70 0.80 g reel dia a0 b0 k0 d e f w p0 p2 p t-max 178 (7?) 2.000.10 2.000.10 0.650.10 1.500.10 1.750.10 3.500.05 8.000.30 4.000.10 2.000.05 4.000.10 0.25 p l1 l2 g2 g1 1 5 8 4 p1 p2 top view bottom view 0.800.025mm 0.300.025mm 1.700.025mm 2.200.025mm 0.800.025mm recommended pattern layout p3 side view g p0 p2 d a0 b0 p e f w pin 1 indicated b y dot k0 top cover tape t 10 pitches cumulative tolerance on tape 0.2
analog products division 561 e. elliot road #175 chandler, az 85225 tel: (480) 539-2900. fax: (602) 431-2288 www.protekanalog.com PA4201 pop-up-noise killer 95020 rev.1. 06/09 patent pending not for use in life support systems + 0.0i0? (0.25 mm) m t b s a s package dimensions and measurements PA4201dq so-8 package dimensions millimeters inches dim min max min max a b c d f g j k p r 4.80 3.80 1.35 0.35 0.40 1.27 bsc 0.18 0.10 5.80 0.25 5.00 4.00 1.75 0.49 1.250 1.27 bsc 0.25 0.25 6.20 0.50 0.189 0.150 0.054 0.014 0.016 0.05 bsc 0.007 0.004 0.229 0.010 0.196 0.157 0.068 0.019 0.049 0.05 bsc 0.009 0.008 0.244 0.019 package outline -a- 8 5 -b - p + 0.0i0? (0.25 mm) m b m 4 pl i 4 d g c 45 0 - i0 -t- j f 8 pl mounting pad 0.050 + 0.005? 0.030 + 0.005? 0.i60 + 0.005? 0.245? m!" 0.045 + 0.005? notes 1. - t - = seating plane and datum surface. 2. dimensions ?a? and ?b? are datum. 3. dimensions ?a? and ?b? do not include mold protrusion. 4. maximum mold protrusion is 0.015? (0.380 mm) per side. 5. dimensioning and tolerances per ansi y14.5m, 1982. 6. dimensions are exclusive of mold flash and metal burrs. tape & reel/bulk ordering nomenclature 1. surface mount product is taped and reeled in accordance with eia-481. 2. suffix-t7 = 7 inch reel - 1,000 pieces per 12mm tape. 3. suffix-t13 = 13 inch reel - 2,500 pieces per 12mm tape. 4. no suffix = product shipped in tubes of 98 pcs per tube. outline & dimensions: rev 1 - 11/01, 06009
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