ETC AN7351K

ICs for Cassette, Cassette Deck
AN7351K, AN7351SC
Dual Pre-Amplifier ICs for Hi-Fi Cassette Deck
■ Overview
AN7351K
1. Available for playback amp. tape speed switching
2. Available for rec. amp. mute function
3. Available for playback amp. input and output switching function
• Rec. amp. current and voltage both drive output is possible.
• Line amp. + mute circuit built-in
• Playback equalizer switching built-in
• Available for microcomputer direct drive of switching
control pin
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
0.5±0.1
0.9±0.25
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
36.8±0.3
■ Features
• Available for double deck
Unit : mm
1.778
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.
13.7±0.3
0.96±0.25
4.76±0.25
3.3±0.25
+ 0.1 5
.0
3 ~ 15˚
0.3 – 0
15.3±0.25
42-Lead SDIP Package (SDIP042-P-0600A)
AN7351SC
0.15
0.3
9.5±0.3
11.5±0.3
21.25±0.3
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
2.0±0.2
0.1±0.1
1.0
0.35±0.1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
0.9
0.45
Unit : mm
42-Lead SOP Package (SSOP042-P-0450)
■ Block Diagram
GND
42
41
40
39
38
37
36
35
34
33
32
31
×1
×2
SW
30
29
28
27
26
REC.
Mute
REC.
24
23
22
REC.
Ch.2
Ch.2
25
Ch.1
Ch.2
Ch.1
Ch.1
P– B
1
–VCC
2
3
4
5
120/70
SW
6
7
8
9
10
11
T1 Line
T2 P– B
SW Mute
12
13
CUE
Rev.
Mute
14
15
16
NC
17
18
19
+VCC
20
21
ICs for Cassette, Cassette Deck
AN7351K, AN7351SC
■ Absolute Maximum Ratings (Ta=25˚C)
Symbol
Rating
Supply Voltage
Parameter
VCC
±7.2
Supply Current
ICC
39
mA
PD
1014 *
787 *
mW
Power Dissipation
AN7351K
AN7351SC
Topr
Operating Ambient Temperature
Storage Temperature
AN7351K
V
–20 ~ + 75
˚C
–50 ~ + 150
Tstg
AN7351SC
Unit
˚C
–55 ~ + 125
* AN7351K : Rth (j–a)=123.3˚C/W, AN7351SC : Rth (j–a)=127˚C/W
■ Recommended Operating Range (Ta= 25˚C)
Parameter
Symbol
Range
Operating Supply Voltage Range
VCC
±4.5V ~ ±7V
■ Electrical Characteristics (VCC= ±6V, f=1kHz, Ta=25˚C)
Parameter
Symbol
Condition
min.
typ.
max.
Unit
<Playback Amp.> RL=20kΩ
Total Harmonic Distortion (1) Tape 1
THD (P1)
Total Harmonic Distortion (2) Tape 1
THD (P2)
Total Harmonic Distortion (3) Tape 2
THD (P3)
Total Harmonic Distortion (4) Tape 2
THD (P4)
Vi =3.6mV
Speed × 1 Feedback Time Constant 120µs
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
0.04
0.1
%
0.04
0.1
%
0.04
0.1
%
0.04
0.1
%
0.7
1.5
mV
0.7
1.5
mV
– 0.9
9
mVP– O
– 0.9
9
mVP– O
Output Noise Voltage Tape 1
VN (T1)
Output Noise Voltage Tape 2
VN (T2)
Pulse Noise Voltage Tape 1
VPN (T1)
Pulse Noise Voltage Tape 2
VPN (T2)
Muting Attenuation Tape 1
RM (T1)
Vi =3.6mV
60
dB
Muting Attenuation Tape 2
RM (T2)
Vi =3.6mV
60
dB
Max. Output Voltage Tape 1
VO (T1)
THD =3%
3
3.4
Max. Output Voltage Tape 2
VO (T2)
THD =3%
3
3.4
Output Offset Voltage Tape 1
VDC (T1)
Rg =220Ω
–70
70
mV
Output Offset Voltage Tape 2
VDC (T2)
Rg =220Ω
–70
70
mV
Crosstalk Tape 1→Tape 2
CT (T1)
Vi =3.6mV
60
dB
Crosstalk Tape 2→Tape 1
CT (T2)
Vi =3.6mV
60
dB
Total Harmonic Distortion VOL
THD (RV)
Vi =200mV
0.03
0.1
%
Total Harmonic Distortion CUR
THD (RC)
Vi =30mV
0.03
0.2
%
V
V
<Rec. Amp>
Max. Output Voltage VOL
VO (RV)
THD =3%, RL =10Ω
Max. Output Voltage CUR
VO (RC)
THD =3%, RL =1Ω
Muting Attenuation VOL
RM (RV)
Vi =200mV
Output Noise Voltage CUR
VN (RC)
Rg =2.2kΩ, DIN/AUDIO
Pulse Noise Voltage CUR
VPN (RC)
Rg =2.2KΩ
Output Offset Current CUR
IDC (RC)
Rg =5KΩ
2.2
3.2
1
1.5
V
V
dB
75
1
mV
–9
9
mVP– O
–25
25
µA
0.03
ICs for Cassette, Cassette Deck
AN7351K, AN7351SC
■ Electrical Characteristics (Cont.) (VCC= ±6V, f=1kHz, Ta=25˚C)
Parameter
Symbol
Condition
min.
typ.
max.
Unit
<Line Amp.>
THD (L)
Total Harmonic Distortion
3
THD =3%
RM (L)
Vi =1V, RL =5.1kΩ
80
CUE/REV Distortion
RM (C/R)
Vi =1V, RL =5.1kΩ
34
Output Noise Voltage
VN (L)
Muting Attenuation
VPN (L)
Rg =5kΩ
–9
Output Offset Voltage
VDC (L)
Rg =10kΩ
–20
G (L)
dB
37
40
dB
0.01
0.03
mV
9 mVP – O
20
mV
0.8
dB
0
1.5
V
0
1.5
V
0
1.45
V
0
1.6
V
0
1.6
V
0
1.6
V
0
1.2
V
34
mA
– 0.8
Vi =1V
%
V
3.6
Rg =5kΩ, DIN/AUDIO
Pulse Noise Voltage
Voltage Gain
0.07
0.02
Vi =1V
VO (L)
Max. Output Voltage
0
<Logic>
Time Constant Switching Pin Voltage
Vt (T1)
Time Constant Switching Pin Voltage
Vt (T2)
Tape Switching Pin Voltage
VT1/T2
L/P Mute Pin Voltage
VM (L/P)
C/R Mute Pin Voltage
VM (C/R)
Recording Mute Pin Voltage
VM (R)
Speed Switching Pin Voltage
VS (H/L)
Pin11 Voltage at 120µs,
VCC = 4.5V
Pin10 Voltage at 120µs,
VCC = 4.5V
Pin12 Voltage at T2 Mode,
VCC = 4.5V
Pin13 Voltage at Mute OFF,
VCC = 4.5V
Pin15 Voltage at Mute OFF,
VCC = 4.5V
Pin27 Voltage at Mute OFF,
VCC = 4.5V
Pin33 Voltage at Double Speed Mode,
VCC = 4.5V
8
Itot
Current Consumption
18
■ Application Circuit
20kΩVR
82Ω
20kΩVR
To Head
100µF/6V
0.0056µF
Tape – 2
L
680 pF
4.7µF
4.7µF
G
10 27 22
kΩ kΩ kΩ
560kΩ
2.2
kΩ 2.7kΩ
18kΩ
100kΩ
680pF
REC.
EQ ×1% × 2– cont.
To Head
10µF/16V
2.7kΩ
LINE
IN
2.2kΩ
18kΩ
F
100kΩ
10kΩ
VR
42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22
×1
×2
SW
R/P Cont.– ,1
R/R Head
R
REC.
REC.
Mute
Ch.2
Ch.2
Ch.2
T1 Line
120/70 T2 P – B
SW
SW Mute
P– B
R/P Cont.– ,1
4
5
6
7
22kΩ
27kΩ
10kΩ
560kΩ
8
Ch.1
CUE
Rev
Mute
9 10 11 12 13 14 15 16 17 18 19 20 21
NC.
0.47µF
3
4.7µF
2
4.7µF
1
R/R Head
R
82Ω
4.7µF
10kΩ 10kΩ
10kΩ
680pF 680 pF
BIAS
10kΩ
VR
Ch.1
Ch.1
Tape –1
L
DOLBY
REC.
4.7µF
4.7µF
0.0056µF
100µF/6V
20kΩVR
20kΩ
VR
4.7µF
FG
µcom
To Amp.
ICs for Cassette, Cassette Deck
AN7351K, AN7351SC
■ Pin Descriptions
Equivalent Circuit
Description
Pin No.
Pin Name
Typ. Waveform
1
Negative Supply Pin
DC– 6V
2
Playback Amp.
T1 IN (Ch.1)
41
Playback Amp.
T1 IN (Ch.2)
2
Playback Amp.
T2 IN (Ch.1)
40
DC 0V
3
Playback Amp.
T2 IN (Ch.2)
4
Playback Amp.
NF IN (Ch.1)
Playback amp. Tape1 input
100Ω
3
AC 3.6mV
40
Main circuit –VCC
Playback amp. Tape2 input
100kΩ
41
100Ω
4
39
DC 0V
39
Playback Amp.
NF IN (Ch.2)
5
120µs/70µs ( × 2)
NF switch (Ch.1)
Playback amp. negative
feedback input
DC 0V
Output
Playback amp.
Double-speed equalizer
switching
38
120µs/70µs ( × 2)
NF switch (Ch.2)
6
120µs/70µs ( × 1)
NF switch (Ch.1)
37
120µs/70µs ( × 1)
NF switch (Ch.2)
7
Playback Amp.
NF OUT (Ch.1)
5
18kΩ
38
AC 1V
DC 0V
Output
Playback amp.
Normal speed equalizer
switching
AC 1V
6
37
– DC 0V
47Ω
Amp.
Playback amp. negative
feedback output
36
Playback Amp.
NF OUT (Ch.2)
47Ω
47kΩ
7
AC 1V
36
8
Playback Amp.
T1 OUT (Ch.1)
+VCC
DC 0V
Playback amp. Tape 1 output
9
34
35
Playback Amp.
T1 OUT (Ch.2)
47Ω
100Ω
35
47Ω
47kΩ
9
Playback Amp.
T2 OUT (Ch.1)
34
Playback Amp.
T2 OUT (Ch.2)
AC 1V
Playback amp. Tape 2 output
–VCC
8
ICs for Cassette, Cassette Deck
AN7351K, AN7351SC
■ Pin Descriptions (Cont.)
Pin Name
Pin No.
10
Typ. Waveform
Description
Equivalent Circuit
VCC
Tape 2 equalizer switching
70µs – Open
120µs – Low (less than 1.5V )
T2 (120µs/70µs)
LOGIC
10
11
11
Tape 1 equalizer switching
70µs – Open
120µs – Low (less than 1.5V )
T1 (120µs/70µs)
LOGIC
12
100kΩ
VCC
Tape 1 and Tape 2 switching
T1 – Open
T2 – Low (less than 1.5V)
T1/T2 LOGIC
12
60kΩ
VCC
13
Line amp., PB amp. mute
switching
Mute ON – Open
Mute OFF – Low (less than 1.6V)
LINE/PB Amp.
Mute LOGIC
27kΩ
13
1kΩ
14
14
LINE
Mute TIMING
Line mute soft switching
11kΩ
47kΩ
VCC
15
15
CUE/REV
Mute LOGIC
16
NC
Mute ON – Open
Mute OFF – Low (less than 1.6V)
VCC
17
LINE Mute Amp.
OUT (Ch.2)
DC 0V
47Ω
Line amp. output
17
47Ω
21
LINE Mute Amp.
OUT (Ch.1)
100Ω
47kΩ
AC 1V
–VCC
21
ICs for Cassette, Cassette Deck
AN7351K, AN7351SC
■ Pin Descriptions (Cont.)
Pin No.
Pin Name
Typ. Waveform
18
LINE Mute Amp.
IN (Ch.2)
DC 0V
Equivalent Circuit
Description
18
20
Line amp. input
20
LINE Mute Amp.
IN (Ch.1)
19
Supply Pin
DC 6V
22
REC. Amp.
Current Out
(Ch.1)
DC 0V
32
REC. Amp.
Current Out
(Ch.2)
23
REC. Amp.
Voltage Out
(Ch.1)
AC 1V
Main circuit + VCC
Rec. amp. current output
200mV output at input 30mV,
load 100kΩ
22
32
DC 0V
47Ω
Rec. amp. voltage output
1.45V output at input 200mV
24
REC. Amp.
NF OUT (Ch.1)
23
47Ω
DC 0V
47Ω
Rec. amp. feedback output
47Ω
30
REC. Amp.
NF OUT (Ch.2)
25
REC. Amp.
NF IN (Ch.1)
29
26
REC. Amp. IN
(Ch.1)
30
25
Rec. amp. negative feedback
input
REC. Amp. IN
(Ch.2)
100Ω
29
DC 0V
100Ω
Rec. amp. input
28
47Ω
24
DC 0V
REC. Amp.
NF IN (Ch.2)
31
100Ω
31
REC. Amp.
Voltage Out
(Ch.2)
26
28
47Ω
ICs for Cassette, Cassette Deck
AN7351K, AN7351SC
■ Pin Descriptions (Cont.)
Pin No.
Pin Name
Typ. Waveform
Description
Equivalent Circuit
27
VCC
47Ω
27
47Ω
Rec. amp. mute switching
Mute ON – Open
Mute OFF – Low (less than 1.6V)
REC. Mute
LOGIC
47Ω
VCC
20Ω
5kΩ
33
Speed H/L switching
× 1– Open
× 2 – Low (less than 1.2V )
SPEED H/L
LOGIC
33
15kΩ
47kΩ
42
GND
DC 0V
Main Circuit GND