AM/FM TUNER + MPX
S1A2295A01
1
INTRODUCTION
The S1A2295A01 is a monolithic integrated circuit desiged for
DTS music centers.
It includes AM/FM IF AMP, FM Quad DET, AM, DET, and MPX
functions.
FEATURES
Wide operating supply voltage (V
CC
= 6V
-
12V)
Low distortion (AM: 0.5%, FM: 0.3%)
Non-Adjusting VCO: Non-Adjusting of free running frequency
Built-in AM Band selection circuit
Built-in VCO stop circuit and muting circuit
Built-in AM/FM station detector circuit
Suitable for DTS (Digital Tuning System) Music Centers
ORDERING INFORMATION
Device
Package
Operating Temperature
Pitch
S1A2295A01-Q0R0
48
-
QFP
-
1010D
- 20
C
-
+ 70
C
0.75mm
48
-
QFP
-
1010D
S1A2295A01
AM/FM TUNER + MPX
2
BLOCK DIAGRAM
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
11
10
9
8
7
6
5
4
3
2
1
48
47
45
44
43
42
41
40
39
38
46
37
12
AW/FM
SW
PILO
DET
HYS
ST
LED
FF.19K
90
DECODE
FM AF
LED
DRIV
AMRF
AMOSC
B/F
AM
BIAS
AM
DET
AGC
FM IF
COMP
AW
IF
AM
MIX
AM
OSCI
FM
DET
LEVEL
DET
AM
OSC2
AFC
ALC
COUNT
OUT
MPX
BIAS
FM
BIAS
BAND
SW
MUTE
REG2
FM AF
PHASE
DET
PHASE
DET
VCO
FF
38K
FF.19K
0
ST
SW
NC
NC
BYPASS
NC
N/C
FMIF
IN
TU LED
AM/SD
ADJ
GND
N/C
AMIF
IN
AGC
GND
N/C
N/C
N/C
N/C
N/C
N/C
AFC
COUNT
OUT
QUAD
MUTE
SW
FMDET
OUT
LED
RESET
N/C
VREG2
AMRF
IN
AM MIX
GND
AMOSC 2
AMOSC 1
AMOSC
B/F OUT
VCC
VCC
BAND
SW
FMAF
IN
AMAF
IN
AMDET
OUT
LPF 1
LPF 2
MO/ST
SW
VCO
ST
LED
AMAF
SW
L-OUT R-OUT SEP
CNT
AGC
TULED
AM/FM
SW
AM/FM TUNER + MPX
S1A2295A01
3
PIN DESCRIPTION
Pin No
Name
I/O
Description
1
FM AF
I
FM AF input pin
2
AM AF
I
AM AF input pin
3
AM DET
O
AM DET output pin
4
LPF1
O
PHASE Detector output pin
5
LPF2
O
PILOT Detector output pin
6
MO/ST SW
-
Mono/stereo select pin
7
VCO
O
Voltage controlled oscillator pin
8
ST-LED
O
Stereo LED pin
9
AM/FM SW
-
AM/FM select pin
10
L-OUT
O
MPX L-channel output pin
11
R-OUT
O
MPX R-channel output pin
12
SEP CNT
-
Separation control pin
13
BAND SW
-
AM band select pin
14, 15
VCC
-
V
CC
pin
16
BUFF OUT
O
AM OSC buffer output pin
17
AM OSC 1
O
AM OSC1 output pin
18
AM OSC 2
O
AM OSC2 output pin
19, 26
GND
-
Ground pin
20
AM MIX
O
AM mixer output pin
21
AM RF
I
AM RF input pin
22
REG
I
Regulator pin
23, 25
N/C
Not used
24
LED SW
LED reset pin
27
AM IF
I
AM IF input pin
28
AM SD
O
AM station detector control pin
29
TU-LED
O
Tuning LED pin
30
AGC
O
AM AGC pin
31
FM IF
I
FM IF input pin
32, 33
NC
-
Not used
34
BY-PASS
O
FM IF bypass pin
35-43
NC
-
Not used
37
GND
-
FM IF ground
44
AFC
O
AGC output pin
45
COUNT
O
AM/FM IF count output pin
46
QUAD
O
FM quadrature detector pin
47
MUTE
-
Muting pin
48
FM DET
O
FM detector output pin
S1A2295A01
AM/FM TUNER + MPX
4
ABSOLUTE MAXIMUM RATINGS (Ta = 25
C)
ELECTRICAL CHARACTERISTICS
Characteristic
Symbol
Value
Unit
Supply Voltage
V
CC
12
V
Power Dissipation
P
D
450
mW
Operating Temperature
T
OPR
-
20
-
70
C
Storage Temperature
T
STG
-
40
-
120
-
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
*FM MONO (f
C
= 10.7MHz, f
m
= 1kHz, f = 75kHz, V
CC
= 8.5V)
Circuit Current 1
I
CC1
V
I
= 0V
18
28
38
mA
-3 dB Sensitivity
V
I(LIM)
V
O
= -3 dB DOWN
-
34
40
dB
Output Voltage 2
V
OF2
V
I
= 100dB
450
550
670
mV
S/N Ratio 3
S/N F
3
V
I
= 100dB
72
77
-
dB
AM Rejection Ratio
AMR
V
I
=100dB
, MOD=30% AM, f
m
= 1kHz
48
60
-
dB
T. H. D.
THD1
V
I
= 100dB
-
0.2
1
%
IF Buffer Output 1
V
OIF
1
V
I
= 50dB
5
260
350
mVms
LED On Sensitivity
V
L
(ON)1
V
I
= variable, svr = 27k
42
52
62
dB
*FM STEREO (f
C
= 10.7MHz, f = 75kHz, L + R = 90%, PILOT = 10%, V
I
= 100dB
, V
CC
= 8.5V)
Separation
SEP
f
m
= 1kHz, Stereo
35
45
-
dB
T. H. D.
THD ST
f
m
= 1kHz
-
0.3
1
%
LED On Level
V
(ON)
Pilot only
4
10
16
mV
Hysteresis
HY
Pilot only
1
3
6
dB
Channel Balance
CB
V
I
= 300mV (Mono)
-
1
0
+1
dB
Muting Attenuation
ATT
V
I
- 300mV (Mono)
67
82
-
dB
*AM (f
C
= 1MHz, fm = 1kHz, MOD = 30%)
Circuit Current 3
I
CC
A
3
V
I
= 0V
17
27
37
mA
Output Voltage 2
V
O
A
2
V
I
= 27dB
70
140
260
mV
Output Voltage 1
V
O
A
1
V
I
= 80dB
170
280
390
mV
T. H. D. 1
THD A
1
V
I
= 80dB
-
0.5
1.2
%
T. H. D. 2
THD A
2
V
I
= 100dB
-
0.6
1.3
%
OSC. Voltage 1
OSC 1
V
I
= 0V
150
250
350
mVrms
OSC. Voltage 2
OSC 2
V
I
= 0V
150
250
350
mVrms
S/N Ratio 2
S/N 2
V
I
= 23dB
10
13
-
dB
S/N Ratio 1
S/N A
2
V
I
= 80dB
44
50
-
dB
If Buffer Output 2
V
(IF)
A
1
V
I
= 20dB
70
100
200
dB
Led On Sensitivity2
V
L
(ON)2
V
I
= variable, SVR = 10k
-
13
20
dB
AM/FM TUNER + MPX
S1A2295A01
5
TEST CIRCUIT
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
4
5
3
2
37
38
39
40
41
42
43
44
45
46
47
48
1
+
+
+
+
+
36
35
34
33
32
31
30
29
28
27
26
25
0.047
1
22
50K
+
450K
100
0.022
V
CC
(8.5V)
SW7
AM RF IN
39mH
51
T3
0.047
T1
T2
3
0
P
3
0
P
50K
0.01
AM OSC
OUT
0.047
SW6
10
L-OUT
R-OUT
10
10
2K
0.01
0.01
SW5
4
5
6
K
H
z
SW3
5
.
1
K
1
0.33
6800P
0.01
10
30P
SW2
3.9K
100P
T4
100P
SW1
10K
1
5.6K
S1A2295A01
FMIFIN
V
DD
(5V)
+
S1A2295A01
AM/FM TUNER + MPX
6
COIL SPECIFICATION
OPERATING PRINCIPLES & METHODS
AM band oscillator
We use new band selection techniques in this IC.
This band selection block is composed of 5 blocks: ALC, OSC1, OSC2, buffer, and select switch. So each micom
voltage (high or low ) can select the AM bands (mw or lw or sw).
Mono, stereo select switch
In FM mode, we can select mono or stereo with micom output voltage, and in stereo state, we can change the state
into mono by compulsion.
NOTE:
"
SAT
"
means saturation.
NO
FUNCTION
f
O
Q
L
C
TURNS
NOTES
1-2
1-3
2-3
2-4
4-6
T1
MW OSC
1.45 MHz
140
140 uH
-
-
64
-
-
32
-
T2
LW OSC
670 kHz
130
220 uH
-
-
80
-
-
40
-
T2
SW OSC
-
28
1.3 uH
-
-
12
-
-
8
-
T3
AM IFT
450 kHz
-
-
180 pF
94
-
58
-
7
-
T4
FM DET
10.7MHz
95
-
56 pF
-
12
-
-
-
Vmicom
STATE
Q1
Q2
VA
HIGH
MONO
SAT
SAT
2.4V
LOW
STEREO
OFF
OFF
8.5V
MICOM
SW
SOC2
BUFF
OSC1
ALC
AM/FM TUNER + MPX
S1A2295A01
7
5
6
Q1
VCC
50K
20K
VA
Q2
GND
MICOM
S1A2295A01
AM/FM TUNER + MPX
8
APPLICATION CIRCUIT
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
4
5
3
2
37
38
39
40
41
42
43
44
45
46
47
48
1
+
+
+
+
+
36
35
34
33
32
31
30
29
28
27
26
25
50K
450K
100
0.022
V
CC
(6V-12V)
HIGH LED RESET
T3
T1
T2
30P
30P
50K
0.01
AM OSC
OUT
10
5K
0.01
0.01
456K
5
.
1
K
1
0.33
6800P
0.01
10
30P
High MUTWE
3.9K
T4
100P
10K
1
5.6K
S1A2295A01
22
10.7
3
3
p
1
0
.
7
2
2
330
22
390
10.7M
V1
0.047
+
100P
1
Mono High
FM High
+
10
F
0.047
30P
T8
V
DD
(5V)
GND
B
Y
P
A
S
S
F
M
I
F
A
G
C
T
U
A
M
S
D
A
M
I
F
G
N
D
LED
VREG2
AM RF
AM MIX
GND
AM OSC2
AM OSC1
AM OSC
V
CC
S
E
P
I
N
L
E
D
A
D
J
I
N
RESET
AFC
COUNT OUT
QUAD
MUTE SW
FM DET OUT
F
M
A
F
I
N
R
L
A
M
/
F
M
S
T
L
E
D
V
C
O
M
O
.
S
T
L
P
F
2
L
P
F
1
A
M
D
E
T
C
N
T
S
W
O
U
T
F
M
A
F
I
N
(ONE CHIP TUNER FOR DTS)
IN
B/F OUT
V
CC
BAND SW
LOW:PIN 17 ON
HIGH:PIN 18 ON
0
.
1
+
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