•
ROHM CO LTD
10
VTR
40E D . . 7828999 0005036 0 "RHM
IC/ICs for VTR Applications
BA7751ALS/BA7752LS
7=77-21
BA7751ALS
BA7752LS
VTR / -"VJIf;t-r1' ;tf~~t&JI
Normal Audio Signal prosessings
• ~Hf~-t$ii~/Dimenslons (Unit : mm)
BA7751ALS/BA7752LS I;l:M~ 1 :J 71 4)'7' /"/, 71
.,
'/7'/"/, ALC IBJB~, ~aUJ7'/"/l.lH1Ug.M~I'::!.M~1j:
Ä
1 ':17 t i'on:l ~';I?:J '/ H:J-)[,@~t: 1 7':1"/1'::
p'q:f;l ~ t.:.:e.l I) Y':I? IC~"90
_
:pj:~1:J714)''j7'/"/I;l:I:l-.I1 x~nt 1j:?"ts l }, A
1J~:}f:.I1 XI;I:-122dBV tßl:~r""(l"90 71:"'7'/ "/1;1:40
dB0~~ft.7',/"/""(I~71'/A1JtN~A1Jt:~ij~
~:I:"9o 71:"'A1J$~~~C~Y~-At:p'q:f;l~"ts
I}, EEJ.iHnaU~I'::1lb~~"9o :l:t.:ALCT1'5'"?~tp'qll
-
-
01.0
tQ
_ _
o~oo
~'"
~~ ~r-
- -
l~L~; -l-
...::::::::JI• 1
?,t:f*ffl ~"tl. \ ~ l' 0 ALC v~)[,IHH;j-
15 1.118'
""(I ~lI:al'::~,3t L t tliiJfj~""(I"9 0 ~ ~d':: 71 :,..tl:l1J$I;l:I~':I
n
2.8~tl
l
.
"'f~k~~[
.. + I
vr S 1}$,\iI.Jt~ij;tEtl~ :bt/)"t ßl:~rlj: 1:::'-?~jm:!WTl' 5'"?
Itf!Uitfi90~~
22.o+g· l
12:0 Rl.0
,0.55
0 - - --
-
0
~
iflqt~
.
----U. (~l~t
0.589+02.
.
.
I
~.
U
0.3
2.54 ± 025
2 4681012141618202224
77"7:"'"/~~lt, LL ""(171 '/~ ~-T1' '/1't:rrl.\:I:
1'(J)1:,
~ ~ -5'" l' :"'1' I':: J: ?"t ALC)[,- "/ti~Wi ~
n
Q<:' t lj:ä.l I) :I:-ttA,o
KaU7 :"'"/1;1: 71:"'7 '/"/tl:l1J t ICp'q$""(I~~~ n "tl.'
:1:"90
:J'/ "O-)~I;l:REC/EE,PB/EE, EP/SP, 71 '/ ~ ~
"(J) 4 -:)(J):J:'"
"I:l-)[,~Tt:
t?"t t-s I}, VTR(J):J'/ l-
1:l-~.t(J)1:"'~7x-ÄW~.~
:l: t': f
.:e -
V
T
R
• •""(I"90
Jll
"'~~~ \,,>~~ON, OFFI.::i$?:/ S ':I? .11-
Xt~.I.::1-'1j:
I
<1j:?"(I.\~1' 0
BA7752LSI;l:, BA7751 ALS I':: M !", REC/EE, PB/EE(J)
:J:'" "1:l-)[,~T(J)H/Lt:~fi~-tt"tI.\:I:"90
The BA7751ALS/BA7752LS are monolilhlc ICs. that
oontalns a playback equalizer amplifier, ALC circult,
reoordlng amplifier and recording/replaylng swlohs and
thelr loglo control clrcuits Intergrdted In 1 chip.
RaHm
1617
•
ROHM CO LTD
VTR
40E D
mIC/ICs for VTR Applications
•
7828999 0005037 2 -RHM
BA7751ALS/BA7752LS
T-77-21
.~:Iil:
1) -t-T-( ;;fia~~Jll;:/.lH~f.l:A-('YT~~fAfila"(I,\
.Qo
• EP/SP-(::J 7-(-Ifm~5tA -( 'Y7o o
• ~1Jf/i!i~1''''y ",~ml)~5t.Qtdf)I;:"'y "'Cl)M~
OO~~"~"'A-(~T~, ~1Jf~~~"~"'A-(~T
"'7-(/~~T~~
t.., "(1,\.Qo
• PB/EE, REC/EEm~ 5t A l' 'Y T (7'.7 L.-::l -1:- '"
(AFR) MlitiiJli~)o
• 7-(:'-~~-T-(:,-/jA1'y7oo
<:tl.!')Cl)::J/ H:::l-JI-~TI;l:::J/ l-1:::l-JI-*tCl)-(:'11-7 .l: - A '/l'f:i5JJ l' iß.Qo
2) ;;f- T -( ;;fCl)~1Jf/i!i~I:~'~f.l:J7 /:1 ~ 1 70 ~ :11;:
~(\f)"(I,\.Qo
3)jf;jL.-I'\:JI-ALC VRCl)!*fflI: J: I)SIN, .iR$'/l~tl.
n\
.Qo
4) ALCL.-""JI-IHH;flflUitl:J: I)~JE~~ Qo
5) IJ 'Y :1JI-7 -( Jl-lI ~ p\;J~ t.."
I) 'Y
:1JI-I) ~ .l: ? :/ 3
:.-
tl'l'i!tl. "( I, \.Q 0
6)m.aA·.~.Cl)*~:1)1~ ~m*A-(~Tm
• Features
1) Provided with many switchs requlred for processing
audlo signals.
o EP/SP equalizer select switch.
o A head swltch and a head swltch driver terminals
are provlded In the replaying and recordlng sides,
respectively In the head for selecting the head.
o PB/EE, REC/EE select switch (applicable to afterrecording mode (AFR)).
• Une muting switch.
These control terminals can be easily Interfaced
with the control system.
2) Amplifiers required for recording/replaying audio
are integrated In 1 chip.
3) Excellent S/N and distortion factor are reaHzed by
introduclng a high-level ALC VR.
4) ALC level 15 settable by an externally connected reslstance.
5) A bullt-in ripple filter efficlently rejects repples.
6) Extremely few pop nolse and switching noise occur
durlng turnlng ON/OFF the power supply and the
control switchs.
7) A few externally connected parts.
8) A wide range of operating voltage (4.5-12.5V)
and small
~5t.Cl)) -( A'Cl)~~tl'l'~ ;P(\f)"(~f.l:1,\0
7 )~H;flt$~tl'l'~f.l:I,\o
8)lbi"F1l!:l±tßIDItl'l'Ü'< (4.5~12.5V), ~}i1I.~1J~~
l' iß .Q 0
•
Jfl~
VTR-t -
• Applicatlons
T -( -tia~~!1
VTR processing audio signals
-
1618
RDHm
•
ROHM CO LTD
VTR
mIC/ICs for VTR Applications
40E D
• :11:1 ';I ~:Si 17'-'5 A~V'~f;tltIBI~~/Block Diagram and
•
7828999 0005038 4 IIRHM
BA7751ALS!BA7752LS
T-77-2T
Externat Circuit
OTRL Vcc
Vcc
r=-t-==~'"=="--rr:-M::-:UT=E:-O~N:-o
UNE IN
BA7751ALS
ö
L..-
---+
.j-:P-=B~IN.:., REr:::O~Ö~UT.:.j_-_I_-~-i.Ni~---OAO BIAS
t
R/P HEAD
V
ii: : R 13 , 0", R", 0" 1;l-lID~;t1lli0)
JHUIi.il:1ll "t'T ~lllIMUTt::
t.n:'I:J; IJr.'lIIttltt1.I!, .::
f1. ~ 0) OR l;l'l'~ ""('T
T
R
0
ffl
0
naHm
1619
•
4DE D .. 7828999 DDDSD39 b IBRHM
BA7751ALS/BA7752LS
VTR mfC/fCs for VTR Applications
T-77-21
ROHM CO LTD
o • •
~ft:l~tE/Electrical Characterlslics (Unless olherwlse noted, Ta=2S'C, Vcc=5V, f=:1kHz)
Parameter
Symbol
IMj;lItJHellll
Min.
I
Typ.
T Max.
4.5-12.5
Vcc
I
Unit
Oonditlon
-
V
I
~fa~~_~{SP'E - ~)
'asp
-
~lI:m~
GVL
15.0
16.7
18.4
dB
~~, ~iljj
~
0:2
%
VIN=-25dBV
kO
8pin,9pin
V,ms
THD=1%
5
9.2
mA-
~~-f} EE~
SP'E - ~
THDee
-
0.06
A1J{/I:::-~/Ä
ZINP
-
30
~*!fl1J '-''"''lv
VOMR
0.75
1.1
-
iltlHljm
GVR
16.3
18.0
19.7
dB
ALO OFF
IlII[§]U'iilIfIJm
GVOR
72 •
79
-
dB
8pln-19pln1'~I~
0.2
%
VIN=-25dBV
-
V,ms
THD=1%
$
)..,1J1I.JJf.1!;t/){,
THDR
-
0.06
1l*!fl1J '-',""lv
VOMR
0.85
1.2
IlIl[§]UlltlIfljm
GVOPB
64
71
-
dB
~
THDpB
-
0.02
0.15
%
VIN=-10dBV
)"'1JjllJ~~
VN1PB
-
-122
-114
dBV
DIN AUDIO (20Hz-20kHz).
Rg=62OQ
A1J1/1:::-~/Ä
ZINPB
-
120
-
kO
~
$
$
_
~_·7_1_1_{_sl_16_fl_'ii_lM
•
*,Hap~T
___JIL__I.:..:$W.:...:1.:....7
_I
100 -, _200
I
(1) IMm~ilH·Q).w!fl~
PB: High
Lew
PB/EE OTRL
EE: Low {BA7751 ALS)
High (BA7752LS)
'71/~//)"'1J1'~jj~/~~A1J~m
• ALC~IM'j; • Wlt
• i1i~iJ!l"';I ~Ä1';lT~ON' OFFt))jl;t
REO : High
Low
REO/EE OTRL
EE: Lew
High (BA7752LS)
• ailjj7'//!fl1J~ON. OF'Ft))jl;t
• ~ilUOOh';I t:Ä1';lT ~711{~ON· OFFt))~;t
(;:'~~TI;tPB/EEOTRL~TJ:l)fI$t;t{,~1', 7'7 '-':::l
'E - ~(AFR)MmiiJii~)
MUTE OTRL
MUTE ON: High MUTE OFF: Lew
• 71 /-P~/!fl1J~ON.OFFt))jiU
(ALO}v-7", ailU7'~/t IHIl3LI;:t1HilliiJii~)
Easw OTRL
EP : High SP: Lew
,
• §17:::l1"!ft))~;t7.1';lT~ON· OFfOt))~;t
1620
RaHm
IJA
1
_
ROHM CO LTD
VTR
40E D
•
7828999 0005040 2 IBIRHM
mIC/ICs for VTR Applications
BA7751ALS/BA7752LS
T-77-21
(2) ::l /." 0- }v-t; - I"~ (BA7751 ALS)
'1:-
~
EE
EE MUTE
REC
RECMUTE
PB
PB MUTE
AFR
AFR MUTE
EP
SP
i!: '1:-
SW
::J/I-I:I-Mlli.:r
REC/EE PB/EE MUTE EP/SP
L
L
L
L
H
L
L
H
L
H
L
H
L
L
H
H
L
H
L
H
H
-
SW2
-
SW1
ON
ON
ON
ON
OFF
OFF
ON
ON
H
-
-
-
H
H
H
-
-
-
-
L
-
R
R
R
R
P
P
R
R
-
SW3
ON
ON
OFF
OFF
ON
ON
OFF
OFF
SW4
OFF
OFF
ON
ON
OFF
OFF
ON
ON
SW5
SW6
SW7
ON
OFF
ON
OFF
ON
OFF
ON
OFF
-
-
-
-
-
ON
OFF
-
-
-
-
OFF
ON
SW8
-
ALe
-
ON
ON
ON
ON
OFF
OFF
ON
ON
ON
OFF
-
-
<,
t:(~/IIl~t.;:
PB"P//, L1NE"P//, REO"p//110N 1,,-r~\:l:T
BA7752LSI1BA7751 ALS(~~t 1", REO/EE, PB/EEO) =! / ~ 1:1 - Mlfi'-O)H/Lt: ~ti ~ -ttn \:1: T
V
T
R
.m
I
RUHm
1621
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