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dual electronic volume control S5A2250A01 1 introduction the S5A2250A01 is a cmos designed for the electronization of dual volume. it is suitable for m/c, and car stereos. features ? wide supply voltage range: v dd = 6v - 12v (backup is possible up to 4v) ? attenuation can be controlled from 0db to - 66db by 2db/step. ? controlling attenuation by means of the built in osc and the up/down terminals. ? single power supply operation as well as split power supply operation. ordering information device package operating temperature S5A2250A01-d0b0 16 - dlp - 300a - 20 c - +70 c 16 - dip - 300a
S5A2250A01 dual electronic volume control 2 block diagram 1 2 4 v ss l-out1 l-in1 a-gnd 3 5 6 8 l-in2 l-out2 inh dco 7 16 15 13 v dd r-out1 r-in1 a-gnd 14 12 11 9 r-in2 r-out2 u/d osc 10 l-ch 10db step up/down r-ch 10db step up/down 2db step up/down 2db step up/down 6 & 7 bits bidirectional shift registor control
dual electronic volume control S5A2250A01 3 pin configuration pin description pin no. symbol descriptions 1 v ss ( - ) power supply (gnd) 2, 15 l-out1 r-out1 10db/step atttenuator output. a signal applied to in is attenuated in 7 steps from 0db to 60db at 10db 3, 14 l-in1 r-in2 10db/step attenuator inputs 4, 13 a-gnd analog ground 5, 12 l-in2 r-in2 2db/step attenuator inputs 6, 11 l-out2 r-out2 2db/step attenuator output. a signal applied to in is attenuated in 5 steps from 0db to 60db at 2db 16 v dd (+) power supply (v dd ) 7 inh when at ? h ? level, normal operation 8 dco dc current output for displaying attenuation 9 osc r, c connecting pin for the oscillator 10 u/d attenuation up/down control input 1 2 4 v ss l-out1 l-in1 a-gnd 3 5 6 8 l-in2 l-out2 inh dco 7 16 15 13 v dd r-out1 r-in1 a-gnd 14 12 11 9 r-in2 r-out2 u/d osc 10 S5A2250A01
S5A2250A01 dual electronic volume control 4 absolute maximum ratings (t a = 25 c) electrical characteristics (v dd = 12v, f = 1khz, ta = 25 c, unless otherwise specified) characteristic symbol value unit supply voltage v dd 13 v power dissipation p d 150 mw operating temperature t opr - 20 - + 75 c storage temperature t stg - 55 - + 125 c input voltage v i v dd + 0.3 - v ss - 0.3 v characteristic symbol test conditions min. typ. max. unit circuit current i dd1 i dd2 v dd = 13v v dd = 6v 0.1 0.1 1.0 0.8 2.5 2.0 ma attenuator resistor ratt1 pin 3 - pin 4 pin 14 - pin 13 25 50 70 k w ratt2 pin 5 - pin 4 pin 12 - pin 13 10 20 30 backup current l backup v dd = 4v, s/w1 = b - - 10 m a input high voltage input low voltage v ih v il - up (down) s/w on s/w1 = a 9.6 11.8 0.5 12.3 1.2 v total harmonic distortion thd v i = 1.0 vpp, att = 10db, f = 15khz - 0.005 0.01 % attenuator error v att(err) v o = 5 step - 2 0 2 db max input amplitude v i(max) thd = 1%, v ol = max 1.0 2.5 4.0 vrms dco output current i o(dco) 1 step 70 100 140 m a cross talk ct att = - 10db 55 65 - db operating frequency f osc1 f osc2 up/sw on, s/w 3 = a s/w 3 = d 5 9 13 11 20 13 hz khz
dual electronic volume control S5A2250A01 5 application information setting of attenuation attenuation is automatically set at the -40db position when power is applied. as soon as the up key is pressed after power on, the u/p pin is placed in the up state at ? h ? level, and the oscilla- tor is actuated. when the down key is pressed, the u/p pin is kept at ? l ? level as long as the down key is pressed, and the oscillator is actuated in the down state, decreasing the attenuation. oscillation frequency is decided by cx & rx. -40db -38 -36 -34 -32 -30 -28 -30 -32 -34 -36 -38 -40 -42db volume level osc up/ down power supply f osc = (hz) (rs 3 3rx) 0.7cx * rx 1
S5A2250A01 dual electronic volume control 6 16 9 10 + + cx (4.7 m f) rs (100k) rx (33k) down up
dual electronic volume control S5A2250A01 7 test circuit S5A2250A01 1 2 3 4 7 12 11 10 9 8 5 6 14 13 16 15 1 m f 1 m f 1 m f 10 m f sw2 1 m f 1 m f a 10 m f 0.012 m f 10 m f 100k w sw3 a b out 2 470k w 470k w in 2 1 m f 10 m f down up 33k w 120k w 4 5 6 8 7 ka4558 vdd idd 680 w 680 w sw1 a b a b out 1 in 1 470k w 470k w 120k w ka4558 4 2 3 8 1 51k w 1k w +
S5A2250A01 dual electronic volume control 8 attenuation display output the S5A2250A01 is provided with the dc current output pin for displaying attenuation. steps of attenuation from 0 db - - are shown in the table below. the current of each step is increased or decreased approximately 100/ua. * current value may fluctuate depending upon the ic. when high precision is required use a variable resistor as a load resistor. step dco attenuation 0 0 - 64db - - 1 i = 100 ua + 30 ua - 60db - - 62db 2 2*1 - 54db - - 58db 3 3*1 - 50db - - 52db 4 4*1 - 44db - - 48db 5 5*1 - 40db - - 42db 6 6*1 - 34db - - 38db 7 7*1 - 30db - - 32db 8 8*1 - 24db - - 28db 9 9*1 - 20db - - 22db 10 10*1 - 14db - - 18db 11 11*1 - 10db - - 12db 12 12*1 - 4db - - 8db 13 13*1 - 0db - - 2db
dual electronic volume control S5A2250A01 9 backup on the S5A2250A01, when power is off (s1 spon) or the inh pin is set at l (- vss) level, all i/o pin are shut off and current consumption is reduced to the minimum. backup by means of a capacitor (c1) becomes possible in this condition. fig 6 shows an example of an application when a backup capacitor is used. note : if v dd -v ss become below 4.0v, the backup is impossible. initialization when power on the S5A2250A01 has a built-in auto-initializing function for initialization when power is on. as the initializing system is adopted through detection of supply voltage level, if rise of power supply is too fast, the initialization may not be fully effected (no external initialization is necessary) in addition for effective initialization, it is necessary that the inh pin is raised simultaneously with the supply voltage. further, the initializing level is -40db. it is recommended to raise the supply voltage and the inh pin as illustrated fig. note : if the voltage between v dd and v ss is below 4.0v, the auto-initializing function is actuated. v dd + r1 r2 c1 v ss 51k w r3 10k w s1 v dd inh v ss 1 2 3 4 5 6 7 8 16 15 14 13 12 10 10 9 S5A2250A01 v dd -v ss or inh pin voltage * v dd -v ss = 4v t > 1ms t
S5A2250A01 dual electronic volume control 10 power supply the S5A2250A01 is able to carry art single power supply operation as well as split power supply operation. split power supply 16 10 4 1 7 8 9 + v dd dco up down S5A2250A01 +v dd 0v -v ss
dual electronic volume control S5A2250A01 11 single power supply 16 10 4 1 7 8 9 + S5A2250A01 +v dd 0v -v ss + down up dco vdd
S5A2250A01 dual electronic volume control 12 application circuit g l r 1n4148 1n4148 r1009 r1009 1000pf s 1 a 0 0 6 5 a 0 1 1 2 3 4 5 6 7 8 9 10 11 12 s 5 a 2 2 5 0 a 0 1 1 2 3 4 5 6 7 8 16 11 15 10 14 9 13 12 k a 4 5 5 8 s op amp 1 2 3 4 5 6 7 8 9 5.6v/1w r202 c200 r200 r203 r204 c201 c208 c204 c203 r206 c205 r205 c206 r207 r264 r224 c210 r222 c211 r223 d202 d201 r225 q202 r208 r221 c209 c207 c202 r209 c219 c230 c232 r226 c225 r227 c220 r228 c226 c231 c221 r229 c222 c227 r230 c233 c230 c229 r231 c234 d208 c218 c224 k a 4 5 5 8 s op amp 1 2 3 4 5 6 7 8 9 r232 r211 r213 c214 r214 c215 c216 r215 r216 r217 r218 47k w r210 q203 c945 c1008 a928 7805 g cd b+ vr-up power vr-dn mute p-sens gnd micom b+ cd pwc power vr-dn mute p-sens gnd micom b+ tape aux cd tuner rec out ac in 220v 50hz l g r vr-up syncr rec b+ 7809 ic200 r269 c213 r212 c237 r233 r235 c238 r234 r236 c945 r237 r238 q204 q207 c945 q201 r265 c236 r220 1 1w q200 r241 r242 q206 r240 q205 r239 c243 r243 r245 r244 c244 d207 1n4001 r246 1 2 1w rq200 c245 r267 r266 q210 a928 c235 q209 c1008 c945 q208 r268 ic203 ic202 ic201 c246 c247 option r251 r248 r255 r250 r249 r254 r253 r258 r252 r256 r260 r261 r263 r262 r257 l g r l r g l g r d206 d205 d203 d204 c241 c238 c240 c239 c242 1n5404x5 dc in 12v 1.5a trans former from tape speaker output 10 m f/16v 10k w 1k w 100k w 100k w 3.3k w 100k w 100k w 3.3k w 1k w 10 m f/16v 1 m f/50v 1 m f/50v 1 m f/50v 4.7k w 1k w 2.2 m f/50v 2.2 m f/50v 1k w 4.7k w 47k w 1 m f/50v 10k w 100 w 100 m f/16v 100k w 100k w 100k w r201 100k w 1 m f/50v 1 m f/50v 1 m f/50v 1 m f/50v 1 m f/50v 15k w 4.7 m f/50v 10k w 100 m f/25v 2.2k w 6.8k w 2.2k w 6.8k w 2.2k w 2.2k w 680 w 680 w 6.8k w 6.8k w 2.2k w 2.2k w 22k w 22k w r259 8.2k w 8.2k w 1 m f/50v 1 m f/50v 1 m f/50v 100 m f/10v c205 22k w 22k w 2.2 m f/50v 10k w 15k w 100 m f/10v c212 100 w 2.2k w 2.2k w 3.9k w 4.7k w 4.7 m f/50v 4.7 m f/50v 10k w 1000 m f/10v 3.3 m f/50v 100 w 2.2 m f/50v 33k w 100 m f/25v 22 w 2.2 w 120 w 220 m f/10v 47 m f/16v 47 m f/16v 120 w 1000 m f/10v 2.2 w 0.15 m f 100 m f/25v 4.7k w 1000pf 1 m f/50v 3.9k w 4.7k w 0.47 m f /50v 2.2k w 6.8k w 10 m f /25v 22k w 1.5k w 2200 m f/25v 0.047 m f x 5 1 m f/50v 22k w 1.5k w 1/2w 1000 m f/16v 2.2k w

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