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Panasonic Semiconductor |
ICs for Cassette, Cassette Deck
AN7351K, AN7351SC
Dual Pre-Amplifier ICs for Hi-Fi Cassette Deck
s Overview
The AN7351K and the AN7351SC are the single chip
ICs designed for pre-amp. for stereo cassette (double
deck especially) incorporating 2-ch rec./playback/line
amp. and muting/switching circuits.
s Features
• Available for double deck
1. Available for playback amp. tape speed switching
2. Available for rec. amp. mute function
3. Available for playback amp. input and output switch-
ing function
• Rec. amp. current and voltage both drive output is pos-
sible.
• Line amp. + mute circuit built-in
• Playback equalizer switching built-in
• Available for microcomputer direct drive of switching
control pin
AN7351K
Unit : mm
1 42
2 41
3 40
4 39
5 38
6 37
7 36
8 35
9 34
10 33
11 32
12 31
13 30
14 29
15 28
16 27
17 26
18 25
19 24
20 23
21 22
13.7±0.3
0.96±0.25
3 ~ 15˚ 15.3±0.25
4.76±0.25
0.3+–00.1.05
3.3±0.25
42-Lead SDIP Package (SDIP042-P-0600A)
AN7351SC
Unit : mm
1 42
2 41
3 40
4 39
5 38
6 37
7 36
8 35
9 34
10 33
11 32
12 31
13 30
14 29
15 28
16 27
17 26
18 25
19 24
20 23
21 22
s Block Diagram
0.3
9.5±0.3
11.5±0.3
42-Lead SOP Package (SSOP042-P-0450)
GND
42 41 40 39 38 37
36 35 34 33 32 31 30 29 28 27 26 25 24 23 22
× 1 REC.
×2
REC.
Mute
REC.
SW
Ch.2 Ch.2 Ch.1
Ch.1
P– B
1 23 4 5 6
–VCC
Ch.2 Ch.1
120/70
SW
T1 Line
T2 P– B
SW Mute
CUE
Rev.
Mute
7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
NC +VCC
AN7351K, AN7351SC
ICs for Cassette, Cassette Deck
s Absolute Maximum Ratings (Ta=25˚C)
Parameter
Symbol
Supply Voltage
VCC
Supply Current
ICC
Power Dissipation
AN7351K
AN7351SC
PD
Operating Ambient Temperature
Topr
Storage Temperature
AN7351K
AN7351SC
Tstg
* AN7351K : Rth (j–a)=123.3˚C/W, AN7351SC : Rth (j–a)=127˚C/W
s Recommended Operating Range (Ta= 25˚C)
Parameter
Symbol
Operating Supply Voltage Range
VCC
Rating
±7.2
39
1014 *
787 *
–20 ~ + 75
–50 ~ + 150
–55 ~ + 125
Range
±4.5V ~ ±7V
Unit
V
mA
mW
˚C
˚C
s Electrical Characteristics (VCC= ±6V, f=1kHz, Ta=25˚C)
Parameter
Symbol
Condition
<Playback Amp.> RL=20kΩ
Total Harmonic Distortion (1) Tape 1
THD (P1)
Vi =3.6mV
Speed × 1 Feedback Time Constant 120µs
Total Harmonic Distortion (2) Tape 1
Total Harmonic Distortion (3) Tape 2
Total Harmonic Distortion (4) Tape 2
Output Noise Voltage Tape 1
Output Noise Voltage Tape 2
Pulse Noise Voltage Tape 1
Pulse Noise Voltage Tape 2
Muting Attenuation Tape 1
Muting Attenuation Tape 2
Max. Output Voltage Tape 1
THD (P2)
THD (P3)
THD (P4)
VN (T1)
VN (T2)
VPN (T1)
VPN (T2)
RM (T1)
RM (T2)
VO (T1)
Vi =3.6mV
Speed × 1 Feedback Time Constant 70µs
Vi =3.6mV
Speed × 2 Feedback Time Constant 120µs
Vi =3.6mV
Speed × 2 Feedback Time Constant 70µs
Rg =2.2kΩ, DIN/AUDIO,
Speed × 1 Feedback Time Constant 120µs
Rg =2.2kΩ, DIN/AUDIO,
Speed × 1 Feedback Time Constant 120µs
Rg =2.2kΩ, DIN/AUDIO,
Speed × 1 Feedback Time Constant 120µs
Rg =2.2kΩ, DIN/AUDIO,
Speed × 1 Feedback Time Constant 120µs
Vi =3.6mV
Vi =3.6mV
THD =3%
Max. Output Voltage Tape 2
VO (T2)
THD =3%
Output Offset Voltage Tape 1
Output Offset Voltage Tape 2
Crosstalk Tape 1→Tape 2
Crosstalk Tape 2→Tape 1
<Rec. Amp>
VDC (T1)
VDC (T2)
CT (T1)
CT (T2)
Rg =220Ω
Rg =220Ω
Vi =3.6mV
Vi =3.6mV
Total Harmonic Distortion VOL
Total Harmonic Distortion CUR
Max. Output Voltage VOL
Max. Output Voltage CUR
Muting Attenuation VOL
Output Noise Voltage CUR
Pulse Noise Voltage CUR
Output Offset Current CUR
THD (RV)
THD (RC)
VO (RV)
VO (RC)
RM (RV)
VN (RC)
VPN (RC)
IDC (RC)
Vi =200mV
Vi =30mV
THD =3%, RL =10Ω
THD =3%, RL =1Ω
Vi =200mV
Rg =2.2kΩ, DIN/AUDIO
Rg =2.2KΩ
Rg =5KΩ
min. typ. max. Unit
– 0.9
– 0.9
60
60
3
3
–70
–70
60
60
0.04
0.04
0.04
0.04
0.7
0.7
3.4
3.4
0.03
0.03
2.2 3.2
1 1.5
75
0.03
–9
–25
0.1 %
0.1 %
0.1 %
0.1 %
1.5 mV
1.5 mV
9 mVP– O
9 mVP– O
dB
dB
V
V
70 mV
70 mV
dB
dB
0.1 %
0.2 %
V
V
dB
1 mV
9 mVP– O
25 µA
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