analog products division 561 e. elliot road #175 chandler, az 85225 tel: (480) 539-2900. fax: (480) 632-1715 www.protekanalog.com pa4220 pop-up and shutdown noise suppressor 95027.rev 0.0 12/10 patent pending; confidential ; covered by non disclosure agreement. not for use in life support systems features ? extremely low supply current (<1 a). ? shunt operation hence distortion free. ? instantaneous. power-up and power-down muting. ? no external microcontroller signal needed. ? esd protected outputs. ? 1.5v to 5v supply operation. ? handle up to 3.5v rms signal. ? compact 2 x 2 x 0.8mm 6l dfn. ? standard 8l so-8 package. 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 and description general description pa4220 is a low power (i cc < 1 a) monolithic mixed signal device. pa4220?s function is to control the power supply transition noise in audio systems. pa4220 boasts several features that make it a ?one of a kind? product on the market. most prominent is the feature is that it does not require any external signal to suppress popup and shutdown noise. pa4220 requires few external components for its operation, working from low to medium supply voltages of up to 5v. the ramp time of the supply should be greater than 50ms. on power-up and power-down the output of the amplifier stage is switched to a convenient low impedance voltage rail hence muting the amplifiers, preventing the audible pop, which is normally heard in the headset or speakers. p a 4 2 2 0 operates as a passive shunt device hence the designer does not have to worry about the device introducing any kind of noise or distortion into the system. it has extremely low current consumption (<1ua). pa4220 is equipped with esd (human body model) protection circuitry on the outputs. pa4220 is available as an 6l low profile 0.8mm dfn package and 8l so-8 package. it is specified for operation over the -40 c to +85c temperature range. functional diagram ordering information temp range package part number soic-8 pa4220dq-t7 -40 to +85c dfn-6 PA4220DN-T7 pin# dfn-6 pin # soic-8 description notes 1 1 rcs power on delay capacitor 2 2 gnd ground 3 nc no connect 3 4 ch2 channel 2 control signal 4 5 ch1 channel 1 control signal 6 nc no connect 5 7 vcc vcc 6 8 cap holding capacitor 95027 v cc nc 1 2 3 4 5 6 7 8 r cs gnd nc ch2 ch1 v cap 6 1 5 4 2 3 r cs gnd ch2 ch1 v cc v cap dfn-6 top view soic-8 top view startup & shutdown control pa4220 v cc c2 = 100 f (typ.) c 3 = 1 f ( m a x. ) c2 c3 ch2 ch1
analog products division 561 e. elliot road #175 chandler, az 85225 tel: (480) 539-2900. fax: (480) 632-1715 www.protekanalog.com pa4220 pop-up and shutdown noise suppressor 95027.rev 0.0 12/10 patent pending; confidential ; covered by non disclosure agreement. not for use in life support systems absolute maximum ratings (all voltages are referenced to gnd) v cc ........................................................................................+6v continuous current (in_, out_) .....................................150ma continuous current (all other pins) .................................20ma continuous power dissipation (t a = +70c) operating temperature range ...........................-40c to +85c storage temperature range .............................-65c to +150c junction temperature ......................................................+150c lead temperature (soldering, 10s) .................................+300c stresses beyond those listed under ?absolute maximum ratings? may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. recommended operating conditions: dc operating conditions unless otherwise specified, v dd =5 10%, t a = ambient temperature = 25 c . limit symbol parameter condition min typical max unit v dd power supply normal operation 2.3 5.0 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 r on switch on resistance vdd=5v 3 4 ? thd total harmonic distortion rl = 32 ? , 30mw, f = 1khz .020 % v sig analog signal range normal operation 3.5 v rms
analog products division 561 e. elliot road #175 chandler, az 85225 tel: (480) 539-2900. fax: (480) 632-1715 www.protekanalog.com pa4220 pop-up and shutdown noise suppressor 95027.rev 0.0 12/10 patent pending; confidential ; covered by non disclosure agreement. not for use in life support systems typical applications typical connection configuration for pa4220 in set top box application startup & shutdown control pa4220 output amp c1 r1 r2 r3 output amp c1 r1 r2 r3 set-to p box c1 = 10 ? 47 f r1 = 100 ? 220 ? r2 = 0 ? 220 ? r3 = 10k ? vcc c2 c3 c2 = 100 f (typ.) c 3 = 1 f ( m a x. )
analog products division 561 e. elliot road #175 chandler, az 85225 tel: (480) 539-2900. fax: (480) 632-1715 www.protekanalog.com pa4220 pop-up and shutdown noise suppressor 95027.rev 0.0 12/10 patent pending; confidential ; covered by non disclosure agreement. not for use in life support systems applications continued typical connection configuration for pa4220 in mp3 player application startup & shutdown control pa4220 left output amp c1 r1 r2 r3 right output amp c1 r1 r2 r3 mp3 pla y er c1 = 220 f r1 = 5k ? 20k ? r2 = 100 ? r3 = 0-30 ? rl= 3 2 ? vcc c2 c3 c2 = 100 f (typ.) c 3 = 1 f ( m a x. ) rl rl
analog products division 561 e. elliot road #175 chandler, az 85225 tel: (480) 539-2900. fax: (480) 632-1715 www.protekanalog.com pa4220 pop-up and shutdown noise suppressor 95027.rev 0.0 12/10 patent pending; confidential ; covered by non disclosure agreement. not for use in life support systems theory of operation startup during startup, the power supply ramps from 0v to v cc . it is critical that this rise time be around 50ms for the pa4220 to perform well. this sudden rise in v cc causes the dc blocking capacitor to charge and thereby the pop up noise. the pa4220 senses this sudden change in voltage and clamps the output line to a low impedance state and suppresses the pop noise. the capacitor at the r cs pin determines the time for which the line can be kept in low impeda nce state during startup after which the switch is released a nd normal operation is started. figure 1: startup pop-noise without pa4220 (32 ? load ) figure 2: startup pop-noise reduction with pa4220 (32 ? load ) shutdown during shutdown, the reverse process happens. as the power supply reaches the threshold on its way down, the pa4220 turns the internal switches on and hence clamping the output stage to low impedance state suppressing the shutdown noise. this operation is governed by the charge stored in the capacitor connected to v cap pin. figure 3: shutdown noise without pa4220 (3 2 ? load ) figure 4: shutdown noise with pa4220 (32 ? load )
analog products division 561 e. elliot road #175 chandler, az 85225 tel: (480) 539-2900. fax: (480) 632-1715 www.protekanalog.com pa4220 pop-up and shutdown noise suppressor 95027.rev 0.0 12/10 patent pending; confidential ; covered by non disclosure agreement. not for use in life support systems + 0.0i0? (0.25 mm) m t b s a s so-8 package outline & dimensions 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 pa4220 xxxx
analog products division 561 e. elliot road #175 chandler, az 85225 tel: (480) 539-2900. fax: (480) 632-1715 www.protekanalog.com pa4220 pop-up and shutdown noise suppressor 95027.rev 0.0 12/10 patent pending; confidential ; covered by non disclosure agreement. not for use in life support systems dfn-6 package outline & dimensions dfn6 package dimensions millimeters inches dim min max min max a a1 a3 d e d1 e1 k b e l l1 0.700 0.00 0.203 1.924 1.924 0.625 0.600 0.200 0.250 0.650 0.274 0.524 0.900 0.050 0.203 2.076 2.076 0.825 0.800 0.200 0.350 0.650 0.426 0.676 0.028 0.00 0.008 0.076 0.075 0.025 0.024 0.008 0.007 0.026 0.011 0.021 0.035 0.002 0.008 0.082 0.083 0.032 0.031 0.008 0.012 0.026 0.017 0.027 package outline mounting pad notes 1. dimensioning and tolerances per ansi y14.5m, 1982. 2. 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 - 3,000 pieces per 12mm tape. 3. suffix-t13 = 13 inch reel - 5000 pieces per 12mm t ape. outline & dimensions: rev 1 - 11/01, 06009 tape and reel specifications (dimensions in mm) reel dia a0 b0 k0 d e f w p0 p2 p t-max 178 (7?) 2.00.10 2.00.10 0.900.10 1.500.10 1.750.10 3.500.05 8.000.30 4.000.10 2.000.05 4.000.10 0.25 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 0.65mm 0.90mm 2.2mm 0.8mm 0.37mm x6 0.90mm 0.5mm pa4220 xxxx
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