AN7367K.pdf
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ICs for Cassette, Cassette Deck
AN7367K
dbx
II
Noise Reduction IC for Cassette Deck
n
Overview
The AN7367K is an integrated circuit available for
stereo operation on a single chip developed for dbx
II
type noise reduction, which can also use for U.S. sound
multiplex TV. And it is designed for easy use of reference
signal level, supply voltage and logic input level.
Unit : mm
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
n
Features
•
Dynamic range : 110dB
•
2-channel
•
Reference input-output signal level : 90mV
•
2 power supply type (+, –)
20
19
18
17
16
15
1.05
0.25
3.05±0.25
±
8.4±0.3
4.8±0.25
3 ~ 15˚
10.16±0.25
28-Lead SDIP Package (SDIP028-P-0400A)
n
Block Diagram
+V
CC
28
27
26
25
24
23
22
21
20
19
18
17
16
15
–
D
EOD
+
C
+
E
–
F
E
O
D
EODEOD
+
A
–
B
BDE
L.S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
GND
–V
CC
ICs for Cassette, Cassette Deck
AN7367K
n
Absolute Maximum Ratings
(Ta=25˚C)
Parameter
Symbol
Rating
Unit
Supply Voltage
Supply Current
Power Dissipation (Ta=75˚C)
Operating Ambient Temperature
Storage Temperature
V
CC
I
CC
P
D
T
opr
T
stg
±7.2
30
450
–20 ~ + 75
–55 ~ + 150
V
mA
mW
˚C
˚C
n
Recommended Operating Range
(Ta=25˚C)
Parameter
Symbol
Range
Operating Supply Voltage Range
V
CC
±
5V ~
±
7V
n
Electrical Characteristics
(V
CC
=
±
6V, Ta=25˚C )
AN7367K H4
Parameter
Symbol
Condition
min.
typ.
max.
Unit
Encode Output Voltage
Encode Linearity –1
*
1
Encode Linearity –2
*
1
Decode Output Voltage
Decode Linearity –1
*
2
Decode Linearity –2
*
2
Encode Max. Output Voltage
Decode Max. Output Voltage
Encode Total Harmonic Distortion
Decode Total Harmonic Distortion
Encode Noise Output Voltage
Decode Noise Output Voltage
Encode Output Defference between Channels
Decode Output Difference between Channels
Encode Crosstalk between Channels
Decode Crosstalk between Channels
Monitor Output Voltage
Monitor Output Voltage Output Difference Between Channels
Monitor Output Noise Output Voltage
Monitor Output Total Harmonic Distortion
dbx OFF Line Output Voltage
dbx OFF Rec. Output Voltage
dbx OFF line Output Total Harmonic Distortion
dbx OFF Rec Output Total Harmonic Distortion
dbx OFF Line Output Noise Output Voltage
dbx OFF Rec. Output Noise Output Voltage
dbx OFF Line Output Output Difference between Channels
dbx OFF Rec. Output Output Difference between Channels
Input Impedance
Total Circuit Current
V
OE
L
E – 1
L
E – 2
V
OD
L
D – 1
L
D – 2
V
OME
V
OMD
THD
E
THD
D
V
NOE
V
NOD
CD
E
CD
D
CT
E
CT
D
V
OM
CD
M
V
NOM
THD
M
V
LOFF
V
ROFF
THD
LOFF
THD
ROFF
V
NLOFF
V
NROFF
CD
LOFF
CD
ROFF
Z
IN
I
tot
V
in
= 1kHz, 90mV (Reference Level)
V
in
= 1kHz, 900mV (Encode)
V
in
= 1kHz, 0.9mV (Encode)
V
in
= 1kHz, 90mV (Reference Level)
V
in
= 1kHz, 285mV (Decode)
V
in
= 1kHz, 9mV (Decode)
THD
= 3%, f
= 1kHz
THD
= 3%, f
= 1kHz
At Encode, 400Hz ~ 30kHz, f
= 1kHz, 90mV
At Decode, 400Hz ~ 30kHz, f
= 1kHz, 90mV
Input short, DIN/AUDIO
Input short, DIN/AUDIO
V
in
= 1kHz, 90mV
V
in
= 1kHz, 90mV
At Encode
*
3
, V
in
= 1kHz, 900mV
At Decode, V
in
= 1kHz, 90mV
At Encode, V
in
= 1kHz, 90mV
At Encode, V
in
= 1kHz, 90mV
Encode input, Short DIN/AUDIO
At Encode, V
in
= 1kHz, 90mV
V
in
= 1kHz, 180mV
V
in
= 1kHz, 180mV
V
in
= 1kHz, 180mV
V
in
= 1kHz, 180mV
Input Short, DIN/AUDIO
Input Short, DIN/AUDIO
V
in
= 1kHz, 180mV
V
in
= 1kHz, 180mV
V
in
= 1kHz, 90mV
Input Short at Encode
67.5
8
– 22
67.5
17
– 43
300
1100
85
10
– 20
85
20
– 40
107
12
– 18
107
23
– 37
mV
dB
dB
mV
dB
dB
mV
mV
%
%
dBV
dBV
dB
dB
dBV
dBV
mV
dB
dBV
%
mV
mV
%
%
dBV
dBV
dB
dB
k
0.35
0.1
– 62
– 96
0
0
– 52
– 91
90
0
– 110
0.01
180
180
0.01
0.01
– 110
– 110
0
0
0.45
0.3
– 58
– 92
1.3
2
– 45
– 85
107
1.5
– 106
0.1
214
214
0.1
0.1
– 104
104
1.5
1.5
– 1.3
– 2
75
– 1.5
151
151
– 1.5
– 1.5
500
mA
12
16
*
1 Level Ratio to V
OE
*
2 Level Ratio to V
OD
*
3 Measure output leak by short of measuring channel input and input to reverse channel.
ICs for Cassette, Cassette Deck
AN7367K
n
Electrical Characteristics (Cont.)
(V
CC
=
±
6V, Ta=25˚C)
Parameter
Symbol
Condition
min.
typ.
max.
Unit
dbx ON/OFF Control dbx ON
V
15ON
Satisfy specifications of the preceding page V
OE
~ V
NLOFF
3.2
6
V
Satisfy specifications of the preceding page
V
OE
~ V
NLOFF
–V
EE
+ 0.4V
dbx ON/OFF Control dbxOFF
V
15OFF
V
16EN
V
16DE
1.8
V
Encode/Decode Control Encode
Satisfy specifications of the preceding page V
OE
~ V
NLOFF
3.2
6
V
Satisfy specifications of the preceding page
V
OE
~ V
NLOFF
–V
EE
+ 0.4V
Encode/Decode Control Decode
1.8
V
dbx ON/OFF Control “L” Overflow Current
Encode/Decode Control “L” Overflow Current
Pulse Noise at Encode
I
15L
I
16L
V
NPE
V
15
=1.8V
V
16
=1.8V
Input Short, Time : a second, number : one
–2.1
–2.1
– 0.2
– 0.2
13
µA
µA
mV
P – P
n
Characteristics Curve
Input/Output Characteristics
(Playback Mode)
20
Input/Output Characteristics
(Rec. Mode)
V
CC
= ± 6V
LPF = 30kHz
HPF = 400Hz
Din Audio – 98dBV
–10
0
V
CC
=
6V
LPF
= 30kHz
HPF
= 400Hz
Din Audio – 62dBV
±
–20
f = 10kHz
–20
f=1kHz
–30
f=10kHz
1.6
V
out
– 40
f = 1kHz
–40
V
out
1.2
f=10kHz
–50
0.8
– 60
2
–60
THD
0.4
f=1kHz
–80
1
f = 1kHz
0
–100
– 80
– 60
– 40
– 20
0
THD
V
in
(dBV)
–100
0
– 60
– 40
–20
0
V
in
(dBV)
Output Frequency Characteristics
(Rec. Mode)
Output Frequency Characteristics
(Playback Mode)
8
V
out
= 87.6mV = 0dB
f = 1kHz
V
in
= 90mV
6
4
4
0
2
– 4
0
V
out
= 85.6mV = 0dB
f = 1kHz
V
in
= 90mV
f ³1kHz ··· LPF (30kHz)
HPF (400Hz)
f <1kHz ··· HPF (400Hz)
– 8
– 2
– 12
– 4
10
100
1k
10k
100k
10
100
1k
10k
100k
Frequency f (Hz)
Frequency f (Hz)
n
Pin Description
Pin No.
Pin Name
Typ. Waveform
Description
Equivalent Circuit
2
·
27
2
27
+
Recording Signal
Input
Pin for inputting signal
0V
ICs for Cassette, Cassette Deck
AN7367K
n
Pin Description (Cont.)
Pin No.
Pin Name
Typ. Waveform
Description
Equivalent Circuit
+
3
·
26
3
–
Emphasis amp. – side input pin
Emphasis
26
+
4
25
–
4
·
25
Line Amp. Output
Line amp. output pin
0V
+
–
+
+
5
·
24
–
Emphasis
Amp. Output
–
Emphasis amp. output pin
0V
5
24
6
·
23
+
6
23
–
Buffer Output
Buffer output pin
0V
7
·
22
7
22
CCA Input
CCA input pin
0V
8
·
21
8
21
CCA Output
CCA output pin
0V
+
9
·
20
–
CCA Amp. Input
CCA amp. input pin
0V
9
20
10
·
19
+
Rec. Out Output
Rec. out output pin
10
19
0V
–
ICs for Cassette, Cassette Deck
AN7367K
n
Pin Description (Cont.)
Pin No.
Pin Name
Typ. Waveform
Description
Equivalent Circuit
11
·
18
Level Sensor Input
–5.2V
Level sensor input pin
11
18
12
·
Timing Capacitor
–5.3V
Level sensor smoothing pin
12
17
17
Timing Current
Adjusting Pin
Adjust the timing current by
external variable resistance.
13
1k
½
13
103µA
15
dbx ON/OFF
Switching
High– dbx ON
Low– dbx OFF
15
3.7k
½
103
µ
A
16
Encode/
Decode Switching
High – Encode
Low– Decode
16
3.7k
½
1
GND
14
(–) Power Supply
28
(+) Power Supply
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