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SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquaters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
VCR Audio Signal Recording
and Playback Processor
Ordering number:EN4091
LA7285, 7285M
Monolithic Linear IC
Overview
The LA7285 and LA7285M include on chip all functions
required for the record and playback of VCR audio
signals. In addition, the inclusion of a switching circuit
for switching between tuner and line input in addition to
the circuits provided by earlier ICs makes the LA7285
truly optimal for audio VCR products.
Funtions
• Equalizer amplifier
• Line amplifier
• Recording/playback switch
• Recording amplifier
• Mute
• SP, LP, EP switch
• Ripple filter
• ALC
• Tape head switch
• Line/tuner input switch
Features
• Built-in input switching circuit (for the line and tuner
inputs).
• Smaller package leaves large space for other
components.
• Equalizer input/output capacitors not required.
• Low gain variation eliminates the need for external
ajustment.
• Supply voltage : 9V and 12V operation.
Package Dimensions
unit:mm
3067-DIP24S
[LA7285]
unit:mm
3112-MFP24S
[LA7285M]
SANYO:DIP24S
Specifications
Maximum Ratings at Ta = 25˚C
retemaraPlobmySsnoitidnoCsgnitaRtinU
egatlovylppusmumixaMV
egatlovtupni1niPV
tnerructupni1niPV
noitapissidrewopelbawollAxamdP 004Wm
erutarepmetgnitarepOrpoT 56+ot01–
erurtarepmetegarotSgtsT 051+ot55–
xam 41V
CC
1CD 56+p-pV
NI
1 5.1±Am
NI
Ta≤65˚C
Operating Conditions at Ta=25˚C
retemaraPlobmySsnoitidnoCsgnitaRtinU
egatlovylppusdednemmoceRV
egnaregatlovylppusgnitarepOV
CC
po 57.21ot5.8V
CC
53098HA (KT) No.4091-1/7
SANYO:MFP24S
˚C
˚C
21V
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LA7285, 7285M
Operating Characteristics at Ta=25˚C, VCC=12V, f=1kHz, 0dBV : 1.0 Vrms
retemaraPlobmySsnoitidnoC
)EE(noitpmusnoctnerruCI
)BP(noitpmusnoctnerruCI
)CER(noitpmusnoctnerruCI
]reifilpmarezilauqE[
niagegatlovtiucric-nepOGV
egatlovesiontupnitnelaviuqEV
]reifilpmaeniL[
)tupniBP(niagegatloVGV
)tupniENIL,EE(niagegatloV
noitrotsidcinomrahlatoTDHT
egatlovesiontuptuOV
egatlovtuptuomumixaMV
nosiCLAnehwegatlovtuptuOV
tceffeCLACLAV
nosiCLAnehwnoitrotsiDDHT
]reifilpmagnidroceR[
)nepo(niagegatloVGV
)esloc(niagegatloVGV
noitrotsidcinomrahlatoTDHT
egatlovtuptuomumixaMV
]tiucricetuM[
egatlovnOV
egatlovffOV
)EE,BP(noitaunettaetuMM
)CER(noitaunettaetuMM
]tiucrichctiwsPS,PL,PE[
egatlovdlohedomPEV
egatlovdlohedomPLV
egatlovdlohedomPSV
]tiucrichctiwsBPrenuT/eniL[
egatlovdlohedomeniLV
egatlovdlohedomrenuTV
egatlovdlohedomBPV
]tiucrichctiwsEE,CER[
egatlovdlohedomCERV
egatlovdlohedomEEV
]hctiwStceleSdaeH[
ecnatsiserno1niPR
ecnatsiserno2niPR
egatlovtupni2niPV
ECC
PCC
RCC
EO
EIN
PL
GV
,EL
GV
LL
LVO
LON
LMO
AO
A
RO
RO
RVO
RMO
NOM
FFOM
PM,E
R
EE
LE
SE
LL
TL
PL
RR
ER
1Am1±=1I0203
NO
2Am1±=2I501
NO
1 54±V
NI
langisoN5.90.315.61Am
langisoN5.90.315.61Am
langisoN0.80.110.41Am
V
V
V
V
V
V
V
VBd7–=0.660.17Bd
O
k2.2=gR Ω retlifoiduANID,2.18.1smrVµ
VBd7–=0.125.120.22Bd
O
VBd7–=0.125.120.22Bd
O
VBd7–=50.03.0%
k2.2=gR Ω retlifoiduANID,27–66–VBd
%1=DHT5.11.2smrV
VBd72–=0.8–0.7–0.6–VBd
NI
NI
VBd72–=50.06.0%
NI
VBd7–=0.740.25Bd
O
VBd7–=5.210.315.31Bd
O
VBd7–=1.03.0%
%1=DHT5.10.2smrV
VBd7–otVBd72–=0.10.3Bd
egatlovCD32niP5.20.6V
egatlovCD32niP05.1V
egatlovCD12niP6.30.6V
egatlovCD12niP8.16.2V
egatlovCD12niP00.1V
egatlovCD22niP6.30.6V
egatlovCD22niP8.16.2V
egatlovCD22niP00.1V
egatlovCD42niP3V
egatlovCD42niP00.1V
Ta=65˚C, f=80kHz (sin), ILK=10µA
sgnitaR
nimpytxam
0809Bd
5657Bd
CC
tinU
V
Ω
Ω
No.4091-2/7
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Block Diagram
Test Circuit
LA7285, 7285M
Unit (resistance:Ω, capacitance:F)
No.4091-3/7