1/4 rev. c structure : silicon monolithic integrated circuit product : audio sound controller type : BD3881FV feature : dual built-in recording and playing preamplifie rs for cassette tapes less external components allows a compact size of the set. the shock sound at power-on/off is absorbed by both power sou rces. the reference voltage of signal systems is designed to be a gro und level so that low offset voltage and l ow noise are achieved. absolute maximum ratings (ta=25) parameter symbol limits unit power supply voltage vdd 5 v vee -5 power dissipation pd 850 mw operating temperature topr 2075 storage temperature tastg 55125 over ta25 ? c, derating at the rate of 8.5mw/ ? c. when installed on the standard board (size: 70701.6mm). operating voltage range symbol limit unit vdd 3.54.75 v vee -4.75-3.5 v (it must function nor mally at ta = 25) application example note that rohm cannot provide adequate confirmation of patents. the product described in this specification is designed to be u sed with ordinary electronic equipment or devices (such as audio-visual equipment, office-automation equipment, communicat ions devices, electrical appliances, and electronic toys). should you intend to use this product with equipment or devices which require an extremely hig h level of reliability and the malfunction of which would directly endanger human life (such a s medical instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and ot her safety devices), please be sure to consult with our sales representative in advance.
2/4 rev. c electrical characteristics (ta = 25 ? c, vdd = 4.5v, vee = -4.5v, f = 1khz, vin = 50mvrms, rg = 600 ? , rl = 10k, input selector = ach, volume=0db, bass=0db, treble=0 db, unless otherwise noted.) parameter symbol limit unit conditions min. typ. max. general vdd circuit current iqvdd - 3.0 8.0 ma vin = 0vrms vee circuit current iqvee -8.0 -3.0 - ach maximum input voltage vaim 0.6 0.8 - vrms thd(vout) =1%, bpf = 40030khz volume = -24db bch maximum input voltage vbim cch maximum input voltage vcim maximum input voltage tp vimtp 0.6 0.8 - vrms thd(vout)=1%, bpf = 40030khz gain = 10db input selector = tp maximum output voltage vom 2.2 2.5 - vrms thd = 1%, bpf = 40030khz voltage gain gv 26 28 30 db gv = 20log(vout/vin) channel balance cb -1.5 0 1.5 db cb = gv1-gv2 total harmonic distortion ratio thd - 0.02 0.1 bpf = 400-30khz output noise voltage vno - 12 20 vrms volume = 0db-84db bpf = ihf-a, rg=0 input point = pin7, pin8 residual noise voltage vmno - 12 20 vrms volume = 0db-84db bpf = ihf-a, rg=0 input point = pin7, pin8 cross-talk between channels * ct 70 85 - db ct = 20log(vin/vout) bpf = ihf-a, rg = 0 input voltage gain a gva 8 10 12 db voltage gain b gvb voltage gain c gvc cross-talk between selectors a1chb1ch * ctab1 -110 -70 db rg = 0, bpf = ihf-a vin=500mvrms cross-talk between selectors a2chb2ch * ctab2 cross-talk between selectors b1chc1ch * ctbc1 cross-talk between selectors b2chc2ch * ctbc2 cross-talk between selectors c1cha1ch * ctca1 cross-talk between selectors c2cha2ch * ctca2 output impedance rsout 50 recoding eq voltage gain rc gvrc 38 40 42 db f=10khz maximum output voltage rc vomrc 2.2 2.5 - vrms thd=1%, bpf=40030khz input conversion noise voltage rc vnorc - 1.5 3.0 vrms rg = 0, bpf = ihf-a slew rate rc vtr 2 4 - v/s play back eq voltage gain tp gvtp 44 46 48 db f=10khz maximum output voltage tp vomtp 2.2 2.5 - vrms input selector = tp thd=1%, bpf=40030khz input conversion noise voltage tp vnotp - 1.1 2.0 vrms input selector = tp rg=2.2k, bpf=ihf-a, gv=20db volume volume maximum input voltage vimv 2.2 2.5 D vrms thd(vout)=1%, bpf=40030khz volume att=-24db volume input impedance rvin 14 20 26 k volume control range vr -87 -84 -81 db bpf = ihf-a volume control step 1 sv1 - 2 - db 0db to ? 36db volume control step 2 sv2 - 4 - db -36db to ? 84db volume setting error 1 ev1 -2 0 2 db 0db to ? 72db volume setting error 2 ev2 -3 0 3 db -76db to ? 84db volume maximum attenuation * attm -118 -90 db volume=-, bpf=ihf-a, vin=3vrms, att=20log(vout/vin)-18db
3/4 rev. c parameter symbol limit unit conditions min. typ. max. bass bass boost control range gbbr +18 +21 +24 db f = 70hz, vin = 5mvrms bass = +21db bass control step s bc - 3 - db f = 70hz, vin = 5mvrms bass setting error (0db12db) e bs 1 -2 0 2 db bass setting error (15db21db) e bs 2 -3 0 3 db treble treble boost control range gbr +12 +14 +16 db f = 10khz, vin = 5mvrms treble = +14db (fc=300hz) treble control step s tc - 2 - db f = 10khz vin = 5mvrms treble setting error e ts -2 0 2 db the operational amplifier for pb should be used with the gain of 10db or above. for measurement, vp-9690a (average value wave detection, effect ive value display) ihf-a filter by matsushita communication industrial is used. phase relation between input/outp ut signal terminals is equipha se. not designed for radiation resistance. outline dimension?marking dimension block diagram unit: resistance = inc1 inc2 cont vee bas2 bas1 out2 out1 rec2o rec2n treble pbn pb2n pb1o pb2o volin1 gnd volin2 tre1 tre2 vdd pb1p pb2p inb1 inb2 ina1 ina2 logic control 9.3k 20k volume rec1n rec1o volume 20k 9.3k 7 69 8 4 35 12 11 10 14 13 2 1 17 18 19 20 21 15 16 22 23 24 25 26 27 28 bass bass treble 18db 18db BD3881FV lot. no. ssop-b28 (unitmm)
4/4 rev. c pin number?pin name pin number pin name pin number pin name pin number pin name pin nu mber pin name pin number pin name 1 pb1n 7 volin1 13 cont 19 ina1 25 rec2o 2 pb1p 8 volin2 14 vee 20 ina2 26 rec2n 3 pb2p 9 gnd 15 bas2 21 inb1 27 rec1n 4 pb2n 10 tre1 16 out2 22 inb2 28 rec1o 5 pb2o 11 tre2 17 bas1 23 inc1 6 pb1o 12 vdd 18 out1 24 inc2 cautions on use 1 about operating voltage range an d operating temperature range within the operating voltage range and the operating temperatur e range, while basic circuit functional operations are supposed to be guaranteed, the standa rd values of the electrical characteristics are guaranteed only when used under the specifi c conditions defined within these ranges. thus, the users must verify those conditions before se tting constants, elements, voltages, and temperatures. note that the conditions of power dissipation ar e also affected with temperatures. 2 about power on reset a built-in circuit for performing initialization inside the ic at power-on is provided. in the case of the set design, however, to be on the safe side, it is recommended that data shall be sent to all the addresses as initial data at power-on and, until this sending o peration is completed, the mute shall be applied. 3 about 1-wire serial control as the cont terminal is designed for inputting a high-frequency digital signal, the wiring and layout patterns should be routed not to cause interference with the an alog-signal-re lated lines. 4 about power on/off shock sound absorbing measures at power on/off are implemented on 5pin, 6pin, 16pin, 18pin, 25pin, and 28pin. when booting up power supplies, the vee side should be booted a little bit earlier than the other side. if the vdd side is booted up first, an excessive cu rrent may pass vdd through vee. when booting off the power supply, the vdd side should be booted off a little bit earlier than the other side. note that, at this time, voltage change passing through the gnd level may produce an abnormally large current. 5 about function switching on switching between the volume, bass, treble, and rec mute fun ctions, the action has been taken to absorb such switching shock sound. for the other function swit ching operations, a combined use of mute is recommendable. as measures against the switching shock sound of karaoke, the bias resistances on 19pin through 24pin should be set to 10k ? or less. function initial condition input selector mute rec output rec mute karaoke stereo volume - ? db treble gain 0db bass gain 0db
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