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Электронный компонент: S1A0296X01

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DOUBLE DECK SYSTEM FOR RADIO CASSETTE
S1A0296X01
1
INTRODUCTION
The S1A0296X01 is a monolithic integrated circuit consisting
of a dual input playback amplifier, 2-channel recording ampli-
fier, outside input selecting switch, and MIC Amp.
The S1A0296X01 processes the MIC input mixing function,
which makes it ideal for application in CD or radio casette tape
players.
FEATURES
Dual input 2-channel playback amplifier
Recording / Playback function
Tape dubbing function
NAB EQ (60 us) for High speed recording function
Allowing 3 (Line 1, Line 2 and AUX) outside inputs
MIC function (Independent and mixture)
ALC function
Operating voltage (4V
-
10V): recommended voltage 6 -- 9V
ORDERING INFORMATION
Device
Package
Operating Temperature
S1A0296X01-A0B0
30
-
SDIP
-
400
-
25
C
-
+75
C
30
-
SDIP
-
400
S1A0296X01
DOUBLE DECK SYSTEM FOR RADIO CASSETTE
2
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATING ( Ta = 25
C )
Characteristic
Symbol
Value
Unit
Supply Voltage
V
CC
12
V
Power Dissipation
P
D
300
mW
Operating Temperature
T
OPR
-
25 -- +75
C
Storage Temperature
T
STG
-
55 -- +125
C
30
29
28
27
26
25
24
23
21
22
20
LEVEL
DET
REC
+ AMP-
INV
+ AMP -
SWITCH
CONTROL
REC
+ AMP-
19
18
17
16
15
20K
1K
CCA
CCA
20K
20K
INV
+ AMP -
20K
2K
INPUT
SELECTOR
20K
20K
14
13
12
11
10
9
8
7
6
5
4
3
INPUT
SELECTOR
20K
INV
+ AMP -
20K
20K
1K
X2
X2
Voltage
Regulator
NAB
+ AMP -
3.3K
3.3K
NAB
+ AMP -
1.8K
1.8K
2
1
CH1-PLAY NF
CH1-PLAY output
CH2-PLAY output
CH2-PLAY NF
CH1-MONOTOR output
CH2-MONITOR utput
CH1-REC NF
CH1-REC output
ALC R/R
CH2-REC output
CH2-REC NF
CH1-A input
CH1-B input
CH2-B input
CH2-A input
GND
VREF
VCC
CH1-LINE1 input
CH1-LINE2 input
CH1-AUX input
CH2-LINE1 input
CH2-LINE2 Input
CH2-AUX input
Mic input
L1 switch
L0 switch
MIC swith
A/B switch
R/P switch
DOUBLE DECK SYSTEM FOR RADIO CASSETTE
S1A0296X01
3
ELECTRICAL CHARACTERISTICS
(V
CC
= 6V, Ta = 25
C, f = 1kHz unless otherwise specified)
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
Quiescent Circuit Current
I
CC
A test mode, Vcc = 4V
7
12.5
20
mA
Reference Bias Voltage
Vref
-
1.7
2.1
2.4
V
Switch
Control
Voltage
R/P
Pin 15
V
SW1
Play
Below 0.4V
V
SW1
REC
Open or 1.3V-1.9V
V
SW1
High speed REC
Above 3 V
A/B
V
SW1
A - deck
Open or Below 0.5 V
Pin 16
V
SW1
B - deck
Above 2V
MIC
Pin 17
V
SW1
Mic off
Below 0.4V
V
SW1
Mic only
Open or 1.3V-1.9V
V
SW1
Mic mix
Above 3V
L0, L1
V
SW1
Low
0.6--0.8V
Pin 18 / Pin 19
V
SW1
High
Above 2V
Line/
AUX
Mode
P
l
a
y

b
a
c
k
Voltage Gain
G
V1
V
O
= 0.5Vrms
4
5.7
8
dB
Max Output
V
OM
1
THD = 1%
0.75
1
-
Vrms
Output Noise Voltage
V
NO
1
Rg = 600
, BW = 20-20kHz
-
35u
100u
Vrms
Hormonic Distortion
THD1
V
O
= 0.5Vrms BW = 20-20kHz
-
0.2
0.5
%
Crosstalk Cross Talk
CT1
V
O
= 0.5Vrms BW = 20-20kHz
-
-
65
-
dB
Ripple Rejection
RR1
ripple = 0.1Vrms/120Hz
-
-
55
-
dB
R
e
c
o
r
d
Voltage Gain
G
V2
V
O
= 0.5Vrms
25
27
29
dB
Max Output
Vom2
THD = 1%
0.9
1.2
-
Vrms
Output Noise Voltage
Vno2
Rg = 600
, BW = 20-20kHz
-
500u
750u
Vrms
ALC Ouptut
VA1
Vin = 0.5Vrms
0.6
0.75
0.9
Vrms
Harmanic Distortion
THD2
V
O
= 0.5Vrms BW = 20-20kHz
-
0.3
1.0
%
Crosstalk Cross Talk
CT2
V
O
= 0.5Vrms BW = 400-20kHz
-
-
65
-
dB
Ripple Rejection
RR2
ripple = 0.1V/120Hz
-
-
30
-
dB
S1A0296X01
DOUBLE DECK SYSTEM FOR RADIO CASSETTE
4
Line/
AUX
Mode
P
l
a
y
b
a
c
k
Voltage Gain
G
V3
VO = 0.5Vrms
23.6
25.6
27.6
dB
Max Output
Vom3
THD = 1%
0.75
1
-
Vrms
Input Noise Voltage
Vni1
Rg = 600
, BW = 20-20kHz
-
60u
150u
Vrms
Harmonic Distortion
THD3
V
O
= 0.5Vrms BW = 20-20kHz
-
0.3
0.5
%
Ripple Rejection
RR3
ripple = 0.1 V/120Hz
-
-
45
-
dB
R
e
c
o
r
d
Voltage Gain
G
V4
V
O
= 0.5Vrms
45
47
49
dB
Mak Output
Vom4
THD = 1%
0.9
1.2
-
Vrms
Input Noise Voltage
Vni2
Rg = 600
, BW = 20-20kHz
-
0.8m
1.2m
Vrms
ALC Output
VA2
Vin = 0.05Vrms
0.6
0.75
0.9
Vrms
Harmonic Distortion
THD4
V
O
= 0.5rms BW = 20-20kHz
-
0.3
1.0
%
Ripple Rejection
RR4
ripple = 0.1V/120Hz
-
-
25
-
dB
Tape
Mode
P
l
a
y
b
a
c
k
Voltage Gain
G
V5
V
O
= 0.5Vrms, Normal, 1kHz
40.1
42.1
44.4
dB
V
O
= 0.5Vrms, High, 1kHz
38.6
40.6
42.6
dB
Max Output
Vom5
THD = 1%
0.75
1
-
Vrms
Input Noise Voltage
Vni3
Rg = 600
, BW = 20-20kHz
-
240u
350u
Vrms
Harmonic Distortion
THD5
V
O
= 0.5Vrms BW = 20-20kHz
-
0.3
0.5
%
Crosstalk Cross Talk
CT3
V
O
= 0.5Vrms BW = 20-20kHz
-
-
65
-
dB
Ripple Rejection
RR5
ripple = 0.1V/120Hz
-
-
36
-
dB
R
e
c
o
r
d
Voltage Gain
G
V6
V
O
= 0.5Vrms, Normal, 1kHz
62
64
66
dB
Max Output
Vom6
THD = 1%
0.9
1
-
Vrms
Input Noise Voltage
Vni4
Rg = 600
, BW = 20-20kHz
-
2.0m
3.0m
Vrms
ALC Output
VA3
Vin = 5mVrms
0.6
0.75
0.9
Vrms
Harmonic Distortion
THD6
V
O
= 0.5Vrms BW = 20-20kHz
-
0.3
1.0
%
Crosstalk Cross Talk
CT4
V
O
= 0.5Vrms BW = 20-20kHz
-
-
60
-
dB
Ripple Rejection
RR6
ripple = 0.1V/120Hz
-
-
17
-
dB
ELECTRICAL CHARACTERISTICS
(Continued)
(V
CC
= 6V, Ta = 25
C, f = 1kHz unless otherwise specified)
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
DOUBLE DECK SYSTEM FOR RADIO CASSETTE
S1A0296X01
5
PIN DESCRIPTION
Pin No.
Symbol
I/O
Internal Equivalence Circuit
1/4
A - input
Playback Amplifier
A - input
2/3
B - input
Playback Amplifier
B-input
5
GND
GND
-
6
VREF
Reference Voltage
7
V
CC
Supply Voltage
-
8/11
LINE1
input
LINE1
External Input
Terminal
9/12
LINE2
input
LINE2
External Input
Terminal
10/3
AUX
input
AUX
External Input
Terminal
1/4
27/30
V C C
G N D
VCC
G N D
2/3
27/30
6
VCC
GND
10/13
9/12
8/11
GND
VCC
30
30
30
S1A0296X01
DOUBLE DECK SYSTEM FOR RADIO CASSETTE
6
14
MIC
input
Input Terminal
15
R/P
switch
Selecting Terminal
16
A/B
switch
A, B Playback Input
Selecting Terminal
17
MIC
switch
MIC Input
Selecting Terminal
18
L0
switch
EXTERNAL LINE
Selecting Terminal
19
L1
switch
20/24
REC NF
REC Amplifier,
negative terminal
21/23
REC output
REC Amplifier
output terminal
22
ALC
R/R
Ripple Rejection
terminal of ALC
detecting output
PIN DESCRIPTION
(Continued)
Pin No.
Symbol
I/O
Internal Equivalence Circuit
14
V C C
G N D
2
2 0
30
1 2
1 2
1 5
1 7
2 0
1 2
1 0
V C C
G N D
V C C
G N D
1 6
1 8
1 9
2 0
VCC
GND
1
20/24
21/23
100
20
V C C
G N D
2 2
DOUBLE DECK SYSTEM FOR RADIO CASSETTE
S1A0296X01
7
25/26
Monitor
output
Monitor
Output Terminal
27/30
PB NF
Playback Amplifier
28/29
PB output
Playback Amplifier
output terminal
for NAB EQ
PIN DESCRIPTION
(Continued)
Pin No.
Symbol
I/O
Internal Equivalence Circuit
V C C
G N D
25/26
100
20
20
2/3
VCC
GND
27/30
VCC
GND
int
28/29
1.8
3.3
S1A0296X01
DOUBLE DECK SYSTEM FOR RADIO CASSETTE
8
APPLICATION INFORMATION
1. SWITCH INPUT CONDITION
According to each mode, function selection basically moves due to the conditions of above table 1 and 2.
Each function pin possesses characteristic representations of functions not in movement, in respect to its
representing functions.
By the virtue of each pin's combinations changing frequency, it is wise to set up or plan the circuit according to
the input conditions of above Tables 1 and 2.
Pin Function
LOW
Open
High
Remarks
Pin 15
REC/PB switch
Play only
Record
only
High speed record
-- NAB automatically alters to High EQ.
within ( pin 15 = high ) high speed rec.
mode.
Pin 16
A/B deck switch
A deck enable
B deck enable
-- Due to external RC time constant, it is
possible to delay the time of
switching.
Pin 17
Mic switch
Mic off
Mic only
Mic mixing
-- It is prohibited to mic input into the (pin
15 = high) high speed rec. mode.
Function Condition
Pin 18
Pin 19
High
Remarks
Line 1
Open
High
In Mic only mode ( pin 17 = open ), all ( line 1, line 2, AUX,
Tape function ) will be somewhat disabled.
Refer to note 3 open condition.
Line 2
High
Open
Aux
High
High
Tape
Open
Open
DOUBLE DECK SYSTEM FOR RADIO CASSETTE
S1A0296X01
9
2. DESCRIPTION OF SWITCH FUNCTION
Controlling the selection switch of pin 15 play / record
Pin 15 is not constructed with logic from inside. However, it is constructed by controlling 3 level switches caused by
external voltage input. As soon as the power is on, it really doesn't matter if the attach switch is in play (low mode).
Nevertheless, if open (record mode), it will turn to record stage and depending on it, the ALC circuit will function.
When and after the source of electric power is approved, all of the circuits will become unstable and the results are
unknown.
Sometime in the beginning, it is necessary to find a method to stop ALC movement for a set period of time, and is
developed through using the original switch period.
Immediately after the approval of the electric
power, source through 100
A
'
s current source
with capacitor and resistance in Pin 15, Pin 15
'
s
current is gradually increased. Until it reaches
the set voltage level, the record state cannot be
accomodated. While under this process, the cir-
cuit in record part will not receive any inputs,
and by discharging the generated increase in
voltage of ALC P/R, it will turn it into initiation.
During of high speed recording, 3.5V of control
voltage must be inflicted. But under this condi-
tion, it is wise to operate at high speed record-
ing after delaying the time by connecting the
resistance with the outside electrical series, or
approve it first and then apply the procedure.
NOTE 1 : 3-step input switch-controlled
voltage ( Pin 15, 17 ).
In the 3-step switch recording system, Pin 15
which decides to play exists and Mic mode-
deciding function P17 exists as well. Voltage in
the high mode is more than enough. Low
mode
'
s voltage will be achieved if the voltage
goes below 0.3 V. The open mode does not
deal with any other voltage, so just open it.
15
100
A
12K
47
F
Control
Voltage
Low
Open
High
0.5V
0.9V
2.1V
2.6V
0 ~ 0.3V
open
state
3.5V ~ VCC
switch input
control
Fig 2 - 3
S1A0296X01
DOUBLE DECK SYSTEM FOR RADIO CASSETTE
10
Pin 16 A/B deck selecting switch control
Pin 16 is not set up interiorily through logic, but depending on the outside voltage input, and the changing proce-
dure of deck A or B, it exists as voltage range.
In order to delete the pop noise which occurs at the time of A/B changing, this transmission range is selected under
the consideration of its design.
Even by delaying and reducing or creasing Pin 16
'
s input voltage, the pop noise changes in sound cannot be
heard by our naked ear.
NOTE 2 : Double input switch (Pin16) control voltage
The 2-step switch is Pin 16 which selects the A/B
deck.
This control voltage is as shown in Figure 4.
1. High mode
'
s voltage is greater than 2 V, which is
more than sufficient. It is nice to have the low mode in
0.3 V or just open it as it is. When it is opened, the
Pin's voltage is almost zero and in turn results in low
voltage.
2. As seen in Figure 4 graph, if 0 V is input into DC
direction under low condition, special blazing fire
could result, so it is wise to switch to low when using
at open state or at pull down resistance state.
NOTE 3: Double input switch (Pin 18, Pin 19) con-
trolled voltage. It is constructed into logic formation
different from A/B switch, and the input condition
which applies to binary switch formation seems
rather difficult. About Low = 0.6 to 0.8V should be
inserted.
Pin 6 connects to Pin 18, Pin 19 with the resisting
value of 15. At open state, it becomes 0.7 Volt. High
is more than 2V.
Fig 2 - 4
VCC
10K
100uA
16
C1 : 22 ~ 47uF
10
Bias
A - on
B - on
B - off
A - off
Control Voltage
0.9V
1.2V
1.6V
80 mSec
at C1:22uF
Fig 2 - 5
Bias
Control Voltage
ON
OFF
0.9V
1.6V
About 10mV at floating
* 2
Open
State
DOUBLE DECK SYSTEM FOR RADIO CASSETTE
S1A0296X01
11
3. HEAD CONNECTION METHOD
Tape Head connecting method
By the virtue of NAB amplifiers input construction layout of this product, the input voltage bias is systemized to be
supplied from an outside source and head connection follows the constructed plan/layouts style shown below.
In employing the record signal, the A/B switch input of pin 16 must be turned into B deck mode(It only applies to
the above situation). For your conviences A and Bs extremetie are designed to be replaced. If the record OSCs
ingredients exist in playback input, it will have damaging effect within the S1A0296X01. That is why precautions
are neccessary. And within the recording output pin the ALC DET is internally connected. If recording AC bias
appears in this terminal, the ALC moves in a distorted manner. Use the trap to make the recording output terminal
bias as small as possible and choose the appropriate OSC frequency for the trap. Also at play mode, since the
recording terminals output D.C is bound by 2.1V and abandon it.
NOTE: Use/apply theabove switch if OSC frequency find within record mode at the system for mation.
Fig 3 - 1
2
3
1
4
6
15
16
7
21
23
*N
P R H
OSC
VCC
REC
+
+
+
+
+
S1A0296X01
DOUBLE DECK SYSTEM FOR RADIO CASSETTE
12
Head Input Circuit (FET switch)
After switching the play head signal will be
inputed into tape, and be aware of many
forming Hums.
Fig 3- 2
21/23
20/24
Rec out
Rec NF
Open the capacitor between the output and the NF
RECORD OUT
REC(High)
Play(Open)
To Pin6 (Vref)
Play(High)
REC(Open)
Tape in-B
Tape in-A
PLAY HEAD
R/P HEAD
+
+
At this point, in order to
make OSC as low as
possible control the OSC
frequency and trap.
If in case the capacitor is not suffici-
ently large enough, at the time of
recording blocking eruption will occur
within the specfied frequency.
In case the capacitor is not sufficiently
large enough, eruption will occur at the
time of recording blocking, within the
specfied frequency.
After swithching the play, head signal will be
input into tape. Be aware of forming Hums.
At this point, in order to
make OSC as low as
possible, control the OSC
frequency and trap.
DOUBLE DECK SYSTEM FOR RADIO CASSETTE
S1A0296X01
13
4. OUTSIDE INPUT
This product is designed to accomdate 3 types of outside input and 3 paired input terminals are also present as
well. It is possible to use each of them independently and their selection lies within the switch output condition of
Table 1 and 2. Under the condition of usage it is wise to be aware of situations since it could be input through
reduction from outside. Take as a reference when input impedance is reduced to approximately 30, especially an
the input dynamic range is 0.6Vrms.
The input monitor output gain is 6dB, and take into if account that record outputs gain is 26dB.
5. MIC INPUT
The MIC amplifiers advantage is 20 dB. Attention MIC input signal level at MIC mixing mode or another input signal
with mixing input signal can be reduce becaused of ALC operating from accessing MIC input signal.
8/11
0dB
6dB
26dB
9/12
0dB
10/13
0dB
30
30
30
NAB
AMP
Fig 4 - 1
25/26
21/23
Line 1
Line 2
AUX
Monitor Output
Record Output
14
17
MIC
VCC
Fig 5 - 1
+
Mic input
Mic switch
+
S1A0296X01
DOUBLE DECK SYSTEM FOR RADIO CASSETTE
14
6. NAB CIRCUIT DESIGN
7. ETC
When in High speed copying mode, the ALC will be off and the actual recorded system is used while for normal
speed it is recorded through ALC.
Within the switch input, it is advisable to keep the voltage below 6V for security.
It may consider the external peaking circuit for recording at high speed recording mode.
The head switching is used as mechanical switch or FET switch for recording circuit.
+
-
27/30
28/29
to input selector
R2 = 1.8K
R2 = 3.3K
H
N
Rnt = 82
47uF
R1=82K
C1=0.039uF
Fig 6 - 1
T1 = 3198mSec,
T2 = 123mSec (Nomal)
24mSec,
= 70mSec (High)
14mSec
Z =(R1 + R2)
1 + j w C1 { R1 R2 / ( R1 + R2)}
1 + j w C1 R1
And
T1 = C1R1,
T2 = C1 ( R1 // R2),
NAB device is comprised of R1, R2, C1 and its
impedance is as expressed and given.
** Internal resistance R2
's
processor distribution
is
20%.
Frequency gain can be esaily discovered as per
given.
Gv = 20log ((Rnf + Z) / Rnf)
** Internal resistance R2
'
s processor distribution
is
20%
NAB device is comprised of R1, R2, C1 and its
impedance is expressed as follows.
Frequency gain cab be easily discovered as given.
NOTE: Internal resistance R2's processor distribution
is + 20%
And
T1 = C1R1,
T2 = C1 (R1//R2),
T1 = 3198
sec
T2 = 123
sec(normal)
24
sec,
= 70
sec(high)
14
sec
DOUBLE DECK SYSTEM FOR RADIO CASSETTE
S1A0296X01
15
8. AMP GAIN DIAGRAM OF EACH MODE
8 - 1. Tape Playback
Monitor output
NABAMP
Input selector
INVAMP
MONAMP
36dB/1KHz
0dB
0dB
6dB (Gain)
-64dBm
-28dBm
-28dBm
-28dBm
-22dBm
8 - 2. EXT Playback
Monitor output
Input selector
INVAMP
MONAMP
-28dBm
-28dBm
-28dBm
-22dBm
0dB
0dB
6dB (Gain)
8 - 3. MIC Playback
Monitor output
MICAMP
Input selector
INVAMP
MONAMP
20dB
0dB
0dB
6dB (Gain)
-48dBm
-28dBm
-28dBm
-28dBm
-22dBm
8 - 4. Tape Playback
Record output
NABAMP
Input selector
INVAMP
RECAMP
36dB/1KHz
0dB
0dB
28dB (Gain)
-68dBm
-32dBm
-32dBm
-32dBm
-4dBm
8 - 5. EXT Playback
Record output
Input selector
INVAMP
RECAMP
-32dBm
-32dBm
-32dBm
-4dBm
0dB
0dB
28dB (Gain)
8 - 6. MIC Playback
Record output
MICAMP
Input selector
INVAMP
RECAMP
20dB
0dB
0dB
28dB (Gain)
-52dBm
-32dBm
-32dBm
-32dBm
-4dBm
S1A0296X01
DOUBLE DECK SYSTEM FOR RADIO CASSETTE
16
TEST CIRCUIT
VT1
22
F
S1A0296X01
1
2
3
4
7
20
8
5
6
22
21
24
23
11
10
9
14
16
13
18
17
19
12
15
26
28
27
30
29
25
220
22
F
220
22
F
220
22
F
220
100
F
1
F
680
1
F
680
1
F
680
1
F
680
1
F
680
1
F
680
1
F
680
100
F
SW9
SW1
SW2
22k
22k
VT2
VT3
VT4
VE1
VE2
VE3
VE4
VE5
VE6
VM
Vcc
SW4
SW5
10k
22k
SW3
22k
SW6
10k
15k
SW7
10k
15k
Vcc
10
F
10
F
10k
0.47
F
SW8
TREC1
10
F
10k
10
F
TREC2
TMON2
10
F
10k
TMON1
10
F
10k

47
F
82
82k
0.039
F
82k
0.039
F
47
F
82