TDA7286
SINGLE CHIP PREAMPLIFIER FOR DOUBLE
DECK RADIO CASSETTE RECORDER
HIGH OPEN-LOOP GAIN (80dB)
VERY LOW INPUT NOISE
LOW TURN ON/OFF POP
LOW SUPPLY CURRENT
PLAYBACK AMPLIFIER WITH HEAD INPUT
SWITCH
RECORDING AMPLIFIER WITH BUILT-IN
ALC
ALC TIME CONSTANT PIN CAN BE USED
AS ALC SWITCH
GOOD SUPPLY RIPPLE REJECTION
DESCRIPTION
The TDA7286 is a monolithic integrated circuit in
DIP20 and SO20 packages designed for 6V, 9V
and 12V AC/DC double deck cassette applica-
tions.
May 1997
BLOCK DIAGRAM
DIP20
SO20
ORDERING NUMBERS:
TDA7286
TDA7286D
1/6
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
S
Supply Voltage
14
V
V
IN
Input DC Voltage
0.4 to 0.5
V
T
op
Operating Temperature
20 to 70
C
T
stg
, T
j
Storage & Junction Temperature
40 to 150
C
THERMAL DATA
Symbol
Parameter
DIP20
SO20
Unit
R
th j-amb
Thermal Resistance Junction to Ambient
Max.
100
200
C/W
PIN CONNECTION (Top view)
TDA7286
2/6
ELECTRICAL CHARACTERISTICS (V
S
= 6V, T
amb
= 25
C; f = 1KHz; R
L
= 4.7k
; R
g
= 2.2k
, unless
otherwise specified.)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
V
S
Supply Voltage
4
12
V
I
d
Quiescent Current
7
15
mA
PLAYBACK AMPLIFIER
G
VO
Open Loop Gain
80
dB
V
CD
Output DC Voltage
1.2
1.5
1.7
V
V
O
Output AC Voltage
THD = 1%
700
950
mVrms
SVR
Supply Voltage Rejection
f = 100Hz
35
45
dB
C
T
Cross Talk
60
dB
E
N
Total Output Noise
R
g
= 0, BW = 22 to 22kHz
300
V
R
E
Internal Feedback Res
180
k
RECORDING AMPLIFIER
G
VO
Open Loop Gain
80
dB
R
i
Input resistance
30
50
70
k
V
DC
Output DC Voltage
2.0
2.4
2.8
V
V
O
Output AC Voltage
THD = 1%
ALC = OFF
ALC = ON
1
0.75
1.4
1
1.25
Vrms
Vrms
THD
Total Harmonic Distortion
V
O
= 0.5Vrms; ALC = OFF
0.2
0.5
%
ALC Range
V
O
= 3dB
48
dB
CB
Channel Balance
ALC = ON
0
2
dB
SVR
Supply Voltage Rejection
f = 100Hz
28
32
dB
C
T
Cross Talk
f = 1KHz
60
dB
HEAD SELECT INPUT
Input LOW Level
chB selected
0.6
V
Input HIGH level
chA seleced
1.4
V
TDA7286
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