Panasonic AN7352S Datasheet
ICs for Cassette, Cassette Deck
■ Overview
The AN7352S is a bipolar IC developed as a playback
pre-amplifier of analogue cassette deck. Particularly in
order to support the automatic adjustment, it incorporates
various volume filter circuits and control functions. Also, it
has realized great reduction of external parts required.
■ Features
•
Variable volume circuits for playback gain adjustment
built-in
•
Various equalizer switching circuit built-in
•
Series mute circuit built-in
•
MS (head locating) amp. comparator circuit built-in
AN7352S
Playback Pre-amplifier for Stereo Cassette Deck
1
2
3
4
5
6
7
8
9
10
11
12
13
14 15
16
17
18
19
20
21
22
23
24
25
26
27
28
0.4±0.25 0.451.27
0.1±0.1
0.3
9.4±0.3
0.15
0.925
2.0±0.2
17.81±0.3
Unit : mm
7.2±0.3
28-Lead SOP Package (SOP028-P-0375A)
Pin No.
Pin Name
21
22
23
24
25
26
27
28
P/R LOGIC
PB Monitor Output
120µ/ 70µ ( × 2) NF SW
120µ/ 70µ ( × 1) NF SW
PB NF Input (L Ch.)
PB T2 Input (L Ch.)
PB T1 Input (L Ch.)
GND
Pin No.
Pin Name
1
2
3
4
5
6
7
8
9
10
–V
CC
PB T1 Input (R Ch.)
PB T2 Input (R Ch.)
PB NF Input (R Ch.)
120µ/ 70µ ( × 2) NF SW
120µ/ 70µ ( × 1) NF SW
PB Monitor Output
T1/ T2 LOGIC
120µ/ 70µ LOGIC
PB Output (R Ch.)
■ Pin Name
Pin No.
Pin Name
11
12
13
14
15
16
17
18
19
20
Volume Control (R Ch.)
MS Input
+V
CC
MS NF Input
MS Output
MS De-coupling
MS GND
Volume Control (L Ch.)
PB Output (L Ch.)
× 1/ × 2 LOGIC
28
1 3 10 13 1411 124 5 7 8 9
26 25 24 23 22 21 20 19 18 17 16 1527
2 6
CTL
120
µ/
70µ
T1/
T2
P/
R × 1/
× 2
CTL
1kΩ
47kΩ
22kΩ
82kΩ
47pF
–
+
–
+
–
+
GND
+V
CC
–V
CC
■ Block Diagram
ICs for Cassette, Cassette Deck
AN7352S
V
CC
ICC (+)
I
CC
(–)
P
D
T
opr
T
stg
Supply Voltage
Supply Current
Power Dissipation
Operating Ambient Temperature
Storage Temperature
V
mA
mA
mW
˚C
˚C
Parameter Symbol Rating Unit
±6.7
22
20
702
–25 ~ + 75
–55 ~ + 150
■ Absolute Maximum Ratings (Ta=25˚C)
± 4.5V ~ ± 6.5V
■ Recommended Operating Range (Ta= 25˚C)
Parameter Symbol Range
Operating Supply Voltage Range
V
CC
Parameter Symbol Condition min. typ. max. Unit
Consumption Current
9I
tot
22 mAV
CC
= ±6V, At no signals 11
Reference Output Level (0dB)
45.4
V
1
49.4 dB47.4
V
in
= –50dBv, f = 1kHz
30kHz LPF ON, V
CNT
= 2.5V
G
H
Reference Output Level (+ 6dB)
V
CNT
= 5V, GH = DATA
(2)
– DATA
(1)
+5 +6 +7 dB
G
L
Reference Output Level (– 6dB)
V
CNT
= 1.25V, GL = DATA
(3)
– DATA
(1)
–7 –6 –5 dB
DG
LR
Level Difference Between Channels
V
CNT
= 2.5V, DG
LR
= V1L– V
1R
0 1 dB
DG
T12
Level Difference Between Tapes
V
CNT
= 2.5V, DG
T1T2
= V
1T1 –V1T2
0 1 dB
THD
11
Total Harmonics Distortion (0dB)
V
CNT
= 2.5V, V9/V
20
= 0V, V8/V21= 5V
0.1 0.3 %
V
no
Output Noise Voltage
V
CNT
= 2.5V, DIN AUDIO, Rg = 2.2kΩ
–69 –62 dBv
V
OMX
Maximum Output Level (0dB)
V
CNT
= 2.5V, THD = 3%
2
3.6
dBv
V
OFF
Output Offset Voltage (0dB)
V
CNT
= 2.5V, Rg = 220Ω
–230
+130
mV
Muting Attenuation
60G
M0
dB
V
CNT
= 0V
Muting Attenuation (T1)
60G
M1
dB
V
CNT
= 2.5V
Muting Attenuation (T2)
60G
M2
dB
V
CNT
= 2.5V
MS Amp. Section
V
CC
= ±6V, V
15
= 0.3V
4kHz Gain (Input Voltage)
G
MS1
–51 dBv
f
= 4kHz
High-Frequency Band Gain (Input Voltage)
G
MS2
–44 dBv
f
= 50kHz
Logic – L
V
CC
= ±4.5V
Time Constant Switching Pin Voltage
0V
9L
1.5 V
120µs mode
Tape Switching Pin Voltage
0V
8L
1.2 V
T2 mode
Speed Switching Pin Voltage
0V
20L
1.2 V
Double speed ( × 2) mode
R – P Switching Pin Voltage
0V
21L
1.5 V
R mode
Logic – H
V
CC
= ±6.5V
Time Constant Switching Pin Voltage
2.6V
9H
5 V
70µs mode
Tape Switching Pin Voltage
3.1V
8H
5 V
CT
Crosstalk Between Channels
V
CNT
= 2.5V, Rg = 220Ω
60
dB
Speed Switching Pin Voltage
3.1V
20H
5 V
Double speed ( × 1) mode
R – P Switching Pin Voltage
2.6V
21H
5 V
P mode
Mute
V
CC
= ±6V
Mute ON Voltage
0V
mute1
0.7 V
Mute OFF Voltage
1.25V
mute2
5 V
T1 mode
■ Electrical Characteristics (VCC= ±6V, Ta=25˚C)
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