M5241L

M5241L MITSUBISHI | Alldatasheet

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MITSUBISHI SOUND PROCESSOR ICs |

DESCRIPTION

The M5241L is an optimum logarithmic VCA for controlling the volume of analog audio signals. Each channel has a control pin and capable of independent operation. The IC can be used in radio cassette tape recorders, car audio systems, and HiFi VCR.

FEATURES

[independent control terminal is provided 2 channels of VCA are incorporated vem @hT and ch2 can be controlled separately by Ve control (pin®, D) [Maximum input voltage is large “ sesstenieuseeesseenseeseeeVj = 3Vems(when THD = 0.5%) : HiLarge ATT rangoessnssssrenteneineaneeneenene® to — 10008 > IES/N(dynamic range) is larges----res-eseeeeeeeesrennee 4B. ; (when ATT = 0dB, R= 15k @, Ro = 30k 2, Ro = 1.8k 2) Outline 10P5 Logarithmic response VCA oe ee ae ey srsnteanemssianenneess Logarithmic response equivalent to A-ccurve volume control {Bias current controllable can be adjusted with external resistor Can be operated with a single power supply RECOMMENDED OPERATING CONDITIONS sesseisetemseeesereses Builtin COM pin@ Voo/2 bias pin Supply voltage rangers: Veo, Vee = 7 to + 18V SYSTEM CONFIGURATION GRAPHIC SELECTOR EQUALIZER: » Vv MB241L HoSHU SSS M@® = 62498eb 0022331 72T 9 MITSUBISHI . 6-12 ELECTRIC Sn G,QGG EE —eO—V—OeOO a...

MITSUBISHI SOUND PROCESSOR ICs. M5241L DUAL VCA FOR ELECTRONIC VOLUME CONTROL PIN CONFIGURATION (TOP VIEW) [10] <+) SUPPLY [9] OUTPUT 2 [&] input 2 CONTROL 2 [8] CONTROL 1 [5] BIAS CONTROL [4] (-) SUPPLY [3] GND (common) [2] INPUT 1 [7] OUTPUT 1 Outline 10P5 IC INTERNAL BLOCK DIAGRAM - - - (10)(+) SUPPLY SS 93 8 s) s) w0@> ae eo ourpur 1g A ® ; | "1 | ® cart BIAS ~~ | Q Q | i 8 i i Ss es) (4) (-) SUPPLY es M@@® = 62498eb 0022332 bbb

9 MITSUBISHI

— MTSUBISHISOUND PROCESSOR ICs M5241L DUAL VCA FOR ELECTRONIC VOLUME CONTROL OO ere ree ABSOLUTE MAXIMUM RATINGS (Ta = 25°C, unless otherwise noted) [Symbol [Parameter Ratings ‘Unit | = 18 (36) [ Ps [Power dissipation | 800m | | Ke | Thermal derating (Ta 2 25%) [mw =55 to +125 ELECTRICAL CHARACTERISTICS (To-25°C, Voo= + 15V, Ri=15k0, Po=30kQ, Rel. 8kQ, Ve-OV unless otherwise noted) i i a ey [toc | Circuit current iV as 38] 65] ma | fT [| 24{ 30] =| Vrms | imum i P= 20k, Ro= 40kQ | f= kHz [| = [42 = vis | Maximum input voltage Ra TOKO Re = 20k0;) THD 05% Vina Reed Vrens | ATT [Maximum attenuation | Vis + 10dBm, f= TkHz,Vo=—300mv | — |-102| -@5| 38 | | ATT___[ Attenuation error Vie + 10dBm. Fa tkHe «dT 20 | -05| +90] a8 | Vi= + 10d8m, = ThHe [= [so1[ +30] | | too | Cutout offset current VisOV CT «dT 20] A | THOT ATT = OdB (WoO), Vor1Vrms f= tet, rota comin [AES Yo [Ton | | aT ab ea BY:10H2 to 30kHz =-204B (Ve=-T6a), [cS | Channel separation f= tHe SC*«idLC «i= | | [HR [Hum rejection = 120H2 = | ATT = 048 (Ve = 0) [= [87] 120 | uvems| Noise output voltsve ATTe-408.Ve=-13801) | oy. 10H, to gone | ——| 85] = [uVers| Vrs ‘ATT=068(Ve=0), Vo=1Vrms, uVems| Ro=20kQ, Ro=1. 2kQ. SS sss M$ 6249826 0022333 STe MITSUBISHI 6-14 oeMRs

MITSUBISHI SOUND PROCESSOR ICs M5241L DUAL VCA FOR ELECTRONIC VOLUME CONTROL eS eee UME CONTROL TEST CIRCUIT tee Fg ver f ° ize >ysws 1 [3 mk dt Swe | R { t ¥ BW: TOHz to 30kHz sah owas! © ene 23 | O74 BENe @ © A Oo ® sws JB} swacal cha Gel Hess No HHL IO 02 \\s_(6) E> NZ 3 FO ©2 -3.3u] 20k )? o3 1 j= 2 ' @) SW6- SWITCH MATRIX [____Pwameter | Swi] SWE] SWS | wa | SWS [SWS OWT | SWE SWS We] | Circuit cuvent [cc Torr [2 [2 yt fa | i | - [orl 2 [ow ; [Van ON a ae ore i ov_| “enon input [Vwe | ON [i ss 72 ore Tf ov_] {Wms [ON [i [i [2 2 2/2 ore rf ov _| | Maximum attenuation [ATTw [ON [1/2 [27a [1 tt || 1/2 | ore | 2 |-200mv| | Attenuation eror [arr | on [i i Py rr 72 [ore [2 | ov_| | Attenuation diviation [AATT | ON [1 [ay 1 | a | 1 [1/2 [or | 2 [ow | | Cutout offset current [too | On [2 fT 2 Ti 1 | ive [on | 2 | ov Total harmonic [THY [on [iva [avi Pa 2 ore [tt ov_| distortion [tHe [ON [72 [avi Ta [ore [1 |-4amv] [THOs | ON [1/2 [avi [tt | 72 [ore | Tomv] [Waor [on [2 2 a 2 ore Tt ov | Noise output voltage [Vwoe | ON [2 [2 Tyr 72 | ore [1 _|-130m [Vwos [on [2 [2 [2 ee v2 Torr | 1] ov _| [Channel sevaration [CS | on [271 [iva [oi ys fi | ive [or [2 | ow _| eeeeeeeeSSSSSSSSSSSSSSSSSSSSSSSSSSssse WM 6249826 0022334 435 a MmsueisHi oan 6-15 eee

MITSUBISHI SOUND PROCESSOR ICs M5241L DUAL VCA FOR ELECTRONIC VOLUME CONTROL TYPICAL CHARACTERISTICS POWER DISSIPATION VS. AMBIENT F 099 TEMPERATURE (MAXIMUM RATINGS) CIRGUTT CURRENT VS. SUPPLY VOLTAGE TT TT] 3 ee ee CNC) > Hee £ 7_tee é 600 5 aco ee Sol tN | |e cCREEEEE COORD] 5 -GARREEC POPES § ey = 4 LTTE | 5 0 25 50 7 100 125 0 2 4 6 8 10 1214 16 18 20 AMBIENT TEMPERATURE Ta (°C) SUPPLY VOLTAGE Vcc (V) BIAS CONTROL RESISTANCE ATTENUATION VS. CONTROL VOLTAGE

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MITSUBISHISOUND PROCESSOR ICs M5241L DUAL VCA FOR ELECTRONIC VOLUME CONTROL. $$ EERECTRONIC VOLUME CONTROL ATTENUATION V8. OUTPUT VOLTAGE ? 1 an ATTENUATION AoE oH eey TTT TT) 5 Ee Sen= — gs FATT § Nee & a Feary MU ESESES ITLL = ie P+ Ne SCT UTTTTITTTT SSS Zz is — B —eoLt lf fve=steomyll TT TIHT| 3 oof fF INE TT = na NI 5 rr ~ oo Paniske Ao 3040! [HTT TTI] Zoot t+ 1 +1 + 10 3571003571k 357 10k 357 100k g ~~ 0 =10=20 -30-40 -50 -60 -70 FREQUENCY f (Hz) ATTENUATION ATT (d8)

2 MANMgUSPLY VOLTAGE g _ TOTAL GrpurvoLraae oN VS:

= "Otte a e ONe=se OOo 3 gfpesgoe = 7fe=ia0' CT 2g [THO = 0px — Fes TB 3 ihe a g 3 sae] 3 sara 8 7 i gC A 2,.f, | | | B vol tik-zat a III 5 1 a 2 SCOTT TA rc a00 | = a eS eS fo} 4A Zo 38 3+ -, Ff 2 3 BOAR Se) ani s ~ | TTT < LTT NE z,. 1 | | | zo LIT YA TTI g °O +5 +10 +15 +20 6 "0.01 3 570.1 35710 35710 SUPPLY VOLTAGE Vcc (V) OUTPUT VOLTAGE Vo (Vrms) z on aumurvetraae"® ge OA TBO VOLTRON YS: - — + 10 =~ oth : om

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• MITSUBISHI SOUND PROCESSOR ICs M5241L DUAL VCA FOR ELECTRONIC VOLUME CONTROL en — ‘TOTAL HARMONIC DISTORTION aA ‘TOTAL HARMONIC DISTORTION g VS. OUTPUT VOLTAGE & VS. OUTPUT VOLTAGE o 'hd-tiey_o o 'het-ev_L O_o Ez R= 1skOl TT TT e gba TTT

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Bos fo keh CO B sho teltieee or TA = 3.0 Fs ite 2 ATT =F ek VEL TT Re-2.4k Boa iat ei B on LUA eis TTI R= 80 8 OTH Tip Re- 12K 2 sa 2 sL LUTZ TT ke=g09 rT RA aes ieee 2 sco 3 ey = CUI SAT TT =< CUTTNeaTT 2 oot LIT IMT TI 2 oo LIT LIT TT 5 "001 35701 35710 35710 is} 0.01 35701 35710 35710 2 2 OUTPUT VOLTAGE Vo (Vrms) OUTPUT VOLTAGE Vo (Vrms) g WefourrurvoLiage g \\s'eomurvoLtaae g . g . o AanieeL—o Tord o ‘Ramet Foleo ieee ee F sfessset HT ee ise ee & fer Co e Ue aT E I TP ore Hh 8 ont beet II Bot LUT IT

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Nh Netivec= +9V. + TREY * Rvcc= +6V 2 ool it UTE 2 oo LULL | TT vee ise © “0.01 3570.1 3571.0 35710 © 0.01 35701 35710 35710 OUTPUT VOLTAGE Vo (Vrms) OUTPUT VOLTAGE Vo (Vrms) OUTPUT | OUTPUT OFFSET CURRENT a vs. SUPPLY VOLTAGE 2 VS. BIAS CONTROL RESISTANCE < 7 W Ri=15kQ a Veo= +1 = |Ro= oxo LTT = 10 Ht++ Re 1ekOl ee es ea _5|INPUT SHORTED! & sty Fa | Rep yy

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3 [~~ 5 Ni £ 2 Lo 2 e LETT TTT TT . ~ttstre ECO fee 5 oO 5 oh LL | Et) °° 0 2 4 6 8 10 12 14 16 18 20 ° 10 15 20 25 30 35 SUPPLY VOLTAGE + Vcc (V) BIAS CONTROL RESISTANCE Re (k Q) MB 6249626 0022337 145 6-18 a y. MTsuas

MITSUBISHI SOUND PROCESSOR ICs. M5241L DUAL VCA FOR ELECTRONIC VOLUME CONTROL. ALVA FOR ELECTRONIC VOLUME CONTROL OUTPUT OFFSET CURRENT OUTPUT NOISE VOLTAGE 2 40 VS. AMBIENT TEMPERATURE 3 100 V8. ATTENUATION g 3 He 2 bd a INPUT SHORTED] . 30h} 2 SNCS I NT} g mm é 25 TT ASN. —| 8 soho R= 20k-Ro=40k | | Nex 15 2 40h BSc) g SA 5S 10 2 al NACE TTT 5 of TTT TTT 5 wl NST E LLL TT TTT a S 3 —20-10 0 10 20 30.40 50 60 70 80 3 -10 -30 -50 -70 -90 AMBIENT TEMPERATURE Ta (°C) ATTENVATION ATT (dB) OUTPUT NOISE VOLTAGE (CHANNEL SEPARATION 5 VS. SUPPLY VOLTAGE VS. FREQUENCY a 2 TEs 90 ae BL R= 15k9 2} —— SSH ea 8 of ——T T_T 8 so UT TIN Tigre 5 =| pee § col LITT TTIT SMT y Sf 8a! Bee NI i es a a ¥ ol +. CM Pet flee ll Eo [BW:: 10H2~30KHz [| 3 3 ° +5 +10 «+15 +20 10 3571003 571k 3 5710k 357 100k SUPPLY VOLTAGE Vee (V) FREQUENCY f (Hz) RIPPLE REJECTION VS. FREQUENCY -80 Pee mT eae

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MITSUBISHI SOUND PROCESSOR ICs M5241L DUAL VCA FOR ELECTRONIC VOLUME CONTROL BASIC PRINCIPLE OF OPERATION The M5241L is a current input, current output type of VCA Ve will change gm. The circuit is also called a variable IC. This amplifier uses the principle by which changing the transconductance (variable gm) OP amp. The basic principle balance of the differential circuit with external control voltage of operation will be simply explained below. 9 +Veo af a | |§ ry if 9 '8 '8 '& O-9 & Rt desi nt Ri IN A 2 ° mare 7 2 ty v | as “® oom ar nL] Ro: Fe Iti . poy | ds i f __| tei) tsi Q ayy a eit} ffeil za Sia. O O a= 8--8 8--8 @ “Leno a @ 3% (S) is the Voc/2 pin (COM pin) derived by voltage division by B1, B2 and so on. All coupling is intemal. Fig. 1 MS5241L Equivalent clroult Basic voltage-current conversion mechanism for Input becomes | +i, the overall emitter current of the differential and output circuit consisting of Qro and Qi will also be determined as Applying the input signal Vi which flows through extemal 1+i by means of current mirror (2). Since the base potential input resistor Ri results in @ change to 2 current signal at of Qio and Qis is the same, the current will be divided input terminal IN. The Vee level shift of Qi, Q2 and Qs will equally and current (I +i) /2 will flow in each of Qio and cause input pin IN to become ground level. The signal input rs. The current of current mirror (4) will also be determined in this way will be sent to the output pin as a current signal as (| +i) /2. because of this. by the current mirror and differential circuit. By taking this Since the current of current mirror (1) is determined es current through the externally-connected output resistor (load 21 by the current flowing in Qs and Qs, the total of the resistor), the signal can go through a current-to-voltage current flowing in Q2 and the current flowing in differential conversion and be obtained as output signal Vo. The output circuit Qs, Qs will also be 21. The current from Q2 which will transistors combine the currents by means of the joined PNP become 1+i flows here and as a result, the overall emitter ‘and NPN collector circuits. Basically, the OC potential floats current of the differential circuit will be 21- (+i) =1—i. and is not determined in this joining of currents. This is why This current is devided the same way as in the differential ‘one end of externally-connected resistor Ro is connected to circuit consisting of Qio and Qu with current (I- i) /2 ground and the DC level at the time of no signal is set. flowing in each of Qs and Qs, From this, the current of Basic mechanism of attenuation current mirror (3) is determined as (Ii) /2 end the current The outout is controlled by means of chenging the control of current mirror (5) becomes (I +i) /2. voltage applied to the Vc pin with respect to the COM pin Now, current (Ii) /2 from current mirror (4) flows in (Voc/2 pin). By applying voltage from the COM pin to the transistor Qiz of the output stage. Since the current flowing base of one side of @ differential circuit and applying voltage _in transistor Qra from current mirror (5) is held at (I-i)/ from the Vc pin to the other base, the current distribution 2, connecting output resistor Ro between the output pin and of the differential circuit is changed and the gain of this the COM pin will result in current i flowing through Ro and circuit is changed. providing a voltage signal Vo =i + Ro. Let us first consider when Vc equals zero (Ve - COM is Here, by selecting Ro=2R, Vo=i+Ro=2!+Ri=Vi and the shorted). Inout signal Vi is converted to current by inout amplifier will have @ gain of 1. resistor Ri and the i currents (2:=Vi/R) flow through the Next, we will consider case of when control voltage Vo. is collectors of Qi and Qz. When the current flowing in Qi applied with regard to the selection of this resistance. Mi = 6£2498eb 0022339 TL0 MITSUBISHI 6-20 wees a

MITSUBISHI SOUND PROCESSOR ICs. M5241L DUAL VCA FOR ELECTRONIC VOLUME CONTROL i rrcrwrrooro ioe 4 veos2 1 + exp Gd + Vo) The gain will be 4 "Ibo Vo _ io+ Ro 2 a) 10M Wo? Ra \\ 7 VBR T+ expG- + Ve) Voce — Vee! and when calculated in dB, Q Q 2 SIRI Hi ATT =20 log (——_4— Y ? ¢ Treo (vo) As in the graph below, the attenuation will change Fig. 2 Differential circult logarithmically with respect to the change of Vc. The values of Vac of the differential stage will be as follows : ATTENUATION VS. CONTROL VOLTAGE KT, cleo oss Vece Ss a In acme ~ a g Veco 4 Tin ¢ 182 E x err =20 es (tee) Veeto # KT jn (112) Fs oe Cer q 1s 8 Veer) +42 jn (HU) 2 qa Is E where, ls: the saturation current < f : the Boltzmann constant | q:the amount of electric charge on the electrons ° CONTR TAGE V¢ T : the absolute temperature OL VOLTAGE Ve (W) From this, Setting and connection of inputioutput resistance ~ Ve = Vers — Vers « KT In «lee As explained above, the input signal is converted to current, Vo= Ves ~ Vee = In (iS) but since the transistor of the input stage is biased at a Ve= Vets ~Vaeio KT tq (ty fixed current (I 170 A when Ro = 1.8kQ), the maximum oe EN Veet a 8 eI value of the input current is determined at the least upper Here, bound of | (Fig. 3). Accordingly, when a large sional is input, Ics + Ico 1~i it is necessary to decrease the value of bias-control resistor loro + len 1+ Re, select a large input/output resistance and decrease the = Vee KT jg le input current. Note that decreasing the value of bias-control Cee resistor Ro and increasing the input/output resistance will VeekT jg le change the characteristic of the noise distortion factor, so oa Tei= Ter set the values to suit the specific application. The current flowing through Qe and Qi: will be (See characteristic curve) (\\-Dexp(- BVe) ti a V+ exo(- 7 Vo) 1 +exp(~ <r Vo) y a : (+idexe(- Srve) Li lon =§ — >? = Teer VO T+ exo 2 VO te ub Current Ict1 is the current of current mirror (4), and Ics will be the same as the current of current mirror (5). At this time, the current that will flow through the output Yjp SH; pin will be the same as that in the explanation when Vc was ° t I , i caval t0 zero, and is expressed as Fig. 3 Maximum current signal SS Mi 6249826 0022340 732 , MITSUBISHI ees 6-21 a

MITSUBISHI SOUND PROCESSOR ICs M5241L DUAL VCA FOR ELECTRONIC VOLUME CONTROL Since the voltage gain (amount of attenuation) is determined by load resistor Ro through which the output current is taken, the value of the input impedance connected to the next stage is a sometimes affected. (Placing Zi in parallel with Ro will lower of psa the impedance.) Generally, a buffer amplifier composed of @ Po transistor or OP amp is connected as shown in Fig. 4 (b). The basic principle of operation on the 2-way power supply @ system has been explained thus fer. Note that it is necessary BUFFER AMPLIFIER to set COM pin (Vcc/2) to ground level by means of . IN] capacitor Co when a single power supply is used. R > ty For operation on a single power supply, see the basic oR (M528 principle of operation for M5222. For connection, see Fo application examples. to) APPLICATION CIRCUIT Fig. 4 Connection example (1) TYPICAL APPLICATION EXAMPLE 9+ Voc 9+ Voo waa on GQ) ont oan) tt () ent aaa ad i Aen tad or Ver o4 OF 7 ‘ o ' ® ‘Loc WwPuT 2 Ro] 220 nae dy pS Lome’ Wi 24 8@) Pe T | ke —® eerie H we —® pete oh : 8— VCC (SINGLE POWER SUPPLY OPERATION) (2.WAY POWER SUPPLY OPERATION) % When Vo=O¥, attenuation of OdB is obtained by selecting Ro = 2A. (2) TEMPERATURE COMPENSATED, OUTPUT OFFSET COMPESATED CIRCUITS 9 +Voc(+18¥) ATTENUATION V8. ro AMBIENT TEMPERATURE 50 (® _—_- Se>y0_L your! (TEMPERATURE COMPENSATED) Rt @) ve * 10 Nore +15¥ meh i @+%> aL oasve-0] | | | | I | ising Ro = Hee o 8 of LETT TTT TTT lee @) | iz waift ara Et pk had a tet ti at Rt ® Ro <-2 sgh Hoi POEL . PELL tok | LG ead | Babe pH & _ jo|-dospove roomy ot fanaa] i 20k} | SE OO st | aS TTT cure re oe CONPENSATED —~Veet-15v)(bFaOO8 © — 60} S00 ae a ZO 1 6 t an penclgn EUBERA TORE AMBIENT TEMPERATURE Ta (°C) 1___ LL COMPENSATED a CIRCUIT ———SSSSSSSSSSSSSSSSSSssssssssese ME 6249826 00223541 675 ae 6-22 ELECTRIC

MITSUBISHI SOUND PROCESSOR ICs MS5241L DUAL VCA FOR ELECTRONIC VOLUME CONTROL |). PROGRAMMABLE ATTENUATION CIRCUIT avec VCF(FIRST-ORDER LOW-PASS FILTER) +Vec (+ 15V) Re 22k i +R ptt cour Ri INo~FY 2 ms24itg} iN 22% ~ ae a: M62} i> our (3 th oVvec/2 220-0 [Ro R 22k oem ates a lo] *R is pull up resistor “Tee array VCF(SECOND-ORDER LOW-PASS FILTER) +Voe + Veo ATTENUATION VS. FREQUENCY RESPONSE. Re 22k if i (FIRST-ORDER LOW-PASS FILTER) ale it 2-H TT TT TTT) ae] Be Ms2ail, (1/2) @ oA Ui “| 10% 25x81 MS24iL (2/2) © -2 NNN ENG 2200 og \\ A \\ A 22k 330p Ss -6 \\ th m 3 gL TINT TINT [Nc enw ~Vee See 2 — rol HIN {TI Mver 8m NITY E iat Tver ev AT TAT Ve <_ valves zoomv IT TINT TNT 14 : ; ~ reL LOTTA TN TINT Unita Resistance : © 10 100 tk ~——«1Ok = «100k Capacitance : F FREQUENCY (Hz) PRINTED CIRCUIT BOARD FOR CIRCUIT TESTING PC BOARD PARTS-PLACEMENT DIAGRAM PC BOARD PARTS-PLACEMENT DIAGRAM (COPPER FOIL SIDE) (PARTS SIDE) e cama * @ [e) Ver ve2 GND O. a tyec OND -veo r-F 55% sPve%, o's, giver Fy °° ° © 16k: Lby outside, this iti is th if : ess wo ow Do cure IN Oc ff o—mo ifs Fa ' Bee, §N2 8 GND + [ala] #60K G8. a ° re Si Bays ° ° a 2 IN200-44%0-K-« ch 4-8 ano oBi%o oo oe elle rset ene’ oe i v i eee wszie ggsassam® ° = Veo 8353880 0 +Vvec ff g ooo S82 gRo e | GND J e [e) oe ° °O SS ss MM 6249426 0022342 SOS Ml MITSUBISHI Jars 6-23 OC _—ooeorereeOEOEOEE