AM/FM TUNER + MPX
S1A2298A01
1
INTRODUCTION
The S1A2298A01 is a monolithic integrated circuit which con-
sists of an FM IF AMP, FM QUAD DET, AM IF AMP, AM DET,
MPX block and Counter output pin for a DTS (Digital Tuning
System) set.
It is designed for use in portable radio cassette recorders.
FEATURES
AM/FM IF, 1 Chip for DTS
Wide Operating Voltage: V
CC
= 1.8V
-
7V
Adjust free FM Quadrature Detector
djust free MPX VCO
ORDERING INFORMATION
Device
Package
Operating Temperature
S1A2298A01-A0B0
24
-
SDIP
-
300
-
20
C
-
+ 75
C
24
-
SDIP
-
300
S1A2298A01
AM/FM TUNER + MPX
2
BLOCK DIAGRAM
PIN CONFIGURATION
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
AM
DET
OSC
SSC
AGC
ST
LED
TU
LED
SW
HYS
ECL
EVEL
SW
AM/FM
MO/ST
ECL
FM
DET
VOC
PIT
DET
PHA
DET
DECODE
FM
IF
BF
AF
AM
IF
AM
MIX
BF
FMIF
IN
AM
MIX
BYPASS
AM
IF
FM
QUAD
DET
OUT
MPX
IN
LPF1
LPF2
VCO
L-OUT
R-OUT
AMIF
IN
IF
SW
AM
OSC
AMOSC
OUT
V
CC
AM
LOWOUT
AGC
IN
IF
REQ
IF
CONUNT
TU
LED
ST
LED
GND
PIL
DET
S1A2298A01
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
AMRF
INPUT
IF
SW
AMOSC
OUTPUT
VCC
AM
LOWCUT
AGC
IF
REQ
IF
COUNT
TU
LED
ST
LED
GND
FMIF
INPUT
AM
MIX
AM
IF
FM
QUAD
DET
OUT
MPX
INPUT
LPF1
LPF2
VCO L-OUT
R-
OUT
BYPASS
AM/FM TUNER + MPX
S1A2298A01
3
PIN FUNCTION
ABSOLUTE MAXIMUM RATING (Ta = 25
C)
Pin No
Symbol
I/O
Function
1
AM RF
I
AM RF Input Pin
2
IF SW
I
IF GAIN Control Pin
3
AM OSC
O
AM Oscillator Pin
4
AM OSC BF
O
AM Oscillator Buffer Pin
5
V
CC
V
CC
Pin
6
AM LOW CUT
O
AM Low Cut Pin
7
AGC
O
AGC Pin
8
IF REQ
O
IF Count Control Pin
9
IF COUNT
O
IF Count Pin
10
TU LED
O
Tuning LED Output Pin
11
ST LED
O
Stereo LED Output Pin
12
GND
Ground Pin
13
R-OUT
O
R-OUT Output Pin
14
L-OUT
O
VCO Output Pin
15
VCO
O
VCO Output Pin
16
LPF2
O
Low Pass Filter 2 Pin
17
LPF1
O
Low Pass Filter 1 Pin
18
MPX
I
MPX Input Pin
19
DET
O
AM/FM Detector Output Pin
20
QUAD
O
Quadrature Detector Pin
21
AM IF
I
AM IF Input Pin
22
BYPASS
AM/FM Bypass Pin
23
AM MIX
O
AM Mixer Pin
24
FM IF
I
FM IF Input Pin
Characteristic
Symbol
Value
Unit
Supply Voltage
V
CC
8
V
Power Dissipation
P
D
1200
mW
Operating Temperature
T
OPR
-
20
-
+75
C
Storage Temperature
T
STG
-
55
-
+150
C
S1A2298A01
AM/FM TUNER + MPX
4
ELECTRICAL CHARACTERISTICS
(Ta = 25
C, VCC = 3 V, unless otherwise specified)
FM: f
C
= 10.7MHz, fm = 1kHz,
f = 22.5kHz, SW1 = 10k
AM: f
C
= 1MHz, fm = 1kHz, MOD = 30%, SW1 = 10k
MPX: fm = 1kHz, L + R = 90%, Pilot = 10%, V
I
= 150mV
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
Quiescent Circuit Current
I
CCQ1
I
CCQ2
FM, V
I
= 0
AM, V
I
= 0
6.5
7
9.5
10
13.5
14
mA
mA
FM
-3 dB Limiting Sensitivity
Detector Output Voltage
Signal to Noise Ratio
AM Rejection Ratio
Total Harmonic Distortion
Lamp On Level
IF Countout Frequency 1
IF Countout Frequency 2
IF Countout Voltage 1
IF Countout Voltage 2
IF Count Sensitivity 1
IF Count Sensitivity 2
IF Count Sensitivity 3
IF Count Sensitivity 4
V
I(SEN)
V
O
S/N
AMR
THD
V
L(on)
F
if1
F
1/8if2
V
if1
V
1/8if2
S
if1
S
if2
S
if3
S
if4
V
O
=
-
3dB
V
I
= 80dBu
V
I
= 80dBu
V
I
= 80dBu
V
I
= 80dBu
V
I
= variable
V
I
= 20dBu
V
I
= 80dBu
V
I
= 61dBu
V
I
= 61dBu
SW1 = 0, SW2 = GND
SW1 = 0.51k
, SW2 = GND
SW1 = 0, SW2 = Vcc
SW1 = 0.51k
, SW2 = Vcc
41
50
55
-
-
44
-
1,3374
350
350
69
61
70
62
46
75
65
38
0.2
49
10.7
1,3375
500
500
76
68
77
69
51
100
-
-
1.0
54
-
1,3376
-
-
83
75
83
76
dBu
mV
dB
dB
%
dBu
MHz
MHz
mVpp
mVpp
dBu
dBu
dBu
dBu
AM
Detector Output Voltage 1
Detector Output Voltage 2
Total Harmonic Distortion
Signal to Noise Ratio
Lamp ON Level
Oscillation Voltage
IF Count Voltage
IF Count Sensitivity 5
IF Count Sensitivity 6
IF Count Sensitivity 7
IF Count Sensitivity 8
V
O
V
O
THD
S/N
V
L(on)
V
OSC
V
if
S
if5
S
if6
S
if7
S
if8
V
I
= 26dBu
V
I
= 60dBu
V
I
= 60dBu
V
I
= 60dBu
V
I
= variable
V
I
= 0
V
I
= 39dBu
SW1 = 0, SW2 = GND
SW1 = 0.51k
, SW2 = GND
SW1 = 0, SW2 = Vcc
SW1 = 0.51k
, SW2 = Vcc
10
50
-
31
21
300
350
42
35
42
35
57
75
1
41
26
500
500
49
42
49
42
85
100
2
-
31
-
-
56
49
56
49
mV
mV
%
dB
dBu
mV
mV
dBu
dBu
dBu
dBu
AM/FM TUNER + MPX
S1A2298A01
5
MPX
Channel Separation 1
Channel Separation 2
Channel Separation 3
Total Harmonic Distortion
Total Harmonic Distortion
Maximum Input Voltage
Voltage Gain
Channel Balance
Signal to Noise Ratio
Lamp On Level
Lamp Hysteresis
Capture Range
Capture Range
CS1
CS2
CS3
THD
THD
V
I(MAX)
G
V
CB
S/N
V
L(on)
HY
CR(H)
CR(L)
Stereo, fm = 100Hz
Stereo, fm = 1kHz
Stereo, fm = 10kHz
Stereo
Mono
Stereo, THD = 3%
Mono
Mono
Mono
Pilot
Pilot
Pilot
Pilot
35
35
35
-
-
250
-
5
-
1
68
-
1
0
-
3.5
42
42
42
0.2
0.2
350
-3
0
78
8
2
1.3
-
1.3
-
-
-
1.0
1.0
-
-
1
+1
-
15
5
3.15
0
dB
dB
dB
%
%
mW
dB
dB
dB
mV
mV
%
%
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
S1A2298A01
AM/FM TUNER + MPX
6
TEST CIRCUIT
0.068
F
SW1
560
MPX IN
220
F
12k
AM
FM
0.082
F
0.082
F
STOP
330pF
T
2
15pF
270
22k
S1A2298A01
1
2
3
4
7
20
19
18
17
8
5
6
22
21
24
23
9
10
11
12
15
14
13
16
50
AM RF IN
560
4.7
F
LPF
51
10k
100k
0.022
F
0.022
F
2.2mH
A
B
C
A
B
SW2
51
51pF
T1
0.01
F
1SV10
0
0.022
F
100
F
0.022
F
4.7
F
SW3
B
A
0.01
F
B
A
220k
VCO
100k
100k
100k
3k
3k
100k
KSC945
KSC945
0.022
F
220
F
Vcc2 (8V)
4.7k
SW8
SW10
MPX
OUT
SW9
0.01
F
0.01
F
4.7
F
CSB456F1
8
0.1
F
SW7
SW6
10
F
330pF
390
SW5
2.2
F
24k
AM
FM
B
A
0.033
F
6800pF
1k
* 10.7MHz
0.022
F
C-F
450B
10.7MAS
L
50
OFF
ON
VCO
Vcc1
DCT OUT
1/8 IF
IF
2K
C-F
C-F
* CDA 10.7MG 65-A (MURATA)
AM/FM TUNER + MPX
S1A2298A01
7
COIL CIRCUIT
No
Function
of
(kHz)
Q
L
(uH)
P
(pF)
Turns
Write
(mm
)
1-2
2-3
1-3
1-4
4-6
T1
AM OSC
796
115
288
-
13
73
-
-
32
0.08
T2
AM IFT
455
120
-
75
-
-
180
-
15
0.06
3
2
1
4
6
T1
3
2
1
T2
4
6
VCC
PIN23
C.F
VCC
VCC
PIN3
V/D
3
1
4
6
V/D
Pin 3
Vcc
KSI-AO5
AM OSC
2
3
1
4
6
Pin 3
Vcc
KSI-AA1
Vcc
CF
AM IFT
NO
F
(kHz)
Qo
Turns
C.L
KWANG SUNG
PART NO
T1
796
115
4-6
1-2
2-3
288
uH
KSI-AO5
32
13
73
T2
455
120
4-6
1-3
180
pF
KSI-AA1
14
146
S1A2298A01
AM/FM TUNER + MPX
8
APPLICATION INFORMATION
1) IF COUNT OUTPUT
IF Count Output is determined by the Pin 8 voltage. Tuning LED swiching Count output occurs at pin 9.
The output impedance is 1.5k
.
V8; High (TU-LED ON) : Output
Low ( TU-LED OFF) : No output
2) IF Switch
IF sensitivity is determined by the resistors of SW1 (0
, 0.51 K
, 10 K
) regulating the AM mixer and FM IF gain.
When SW2 is V
CC
, the count output frequency is 10.7 MHz.
When SW2 is GND, the count output frequency is 1.33375MHz, one eighth of 10.7MHz.
3) AM Low Cut
One of the signals which passed through DET AMP is provided to AF AMP, another is converted to AC before its
feedback to AGC voltage and they are simultaneously used as a high frequency bypass.
4) AM OSC BUFFER
Output Impedance is 6.1k
,
SIGNAL WAVE FORM is the rectangle wave, and the voltage scale of the OSC buffer
OUTPUT is 500mVp-p.
5) MPX
INPUT IMPEDANCE: 25k
OUTPUT IMPEDANCE: 5k
AM/FM TUNER + MPX
S1A2298A01
9
APPLICATION CIRCUIT
0.068
F
OSC
OUT
AM FM
0.047
F
0.082
F
MONO
4.7k
S1A2298A01
1
2
3
4
7
20
19
18
17
8
5
6
22
21
24
23
9
10
11
12
15
14
13
16
0.01
F
0.01
F
CSB456F18
SW7
* 10.7MHz
0.022
F
450kHz
10.7MHz
1/8 IF
IF
560
560
0.022
F
4.7
F
0.01
F
0.01
F
AM
ANT
IF
RFO
IF
OUT
GND
FM IF-IN
R-OUT
L-OUT
0.1
F
C-F
C-F
C-F
* CDA 10.7MG 65-A (MURATA)
S1A2298A01
AM/FM TUNER + MPX
10
APPLICATION CIRCUIT
BPF
S 1 A 2 2 9 8 A 0 1
IF + MPX
1
24
2
23
3
22
4
21
5
20
6
19
7
18
8
17
16
10
15
11
14
12
13
9
S 1 A 0 4 9 7 X 0 1
FM FRONT END
C12
0.047
F
C2
470
C17
R9
33k
L2
C3
470pF
R1
33k
C6
15pF
L1
Q4
100pF
T3
R12
1k
R13
120
R6
2.7k
R7
390
Q3
0.022
F
C36
F2
10.7MHz
Q5
R17
100k
AM ANT
0.022
F
C41
R14 100k
C38
470pF
0.01
F
0.022
F
/50V
C33
4.7
F
C31
C32
0.01
F
C34
R15 560
0.018
F
C23
0.018
F
C22
/50V
4.7
F
C24
/50V
4.7
F
C26
Q6
Q7
R3
10k
10k
R4
/50V
SW1
X2
F1
0.022
F
C13
C14
1
F
C4
0.068
F
C15
0.047
F
C5
4.7k
R5
C16
0.082
F
X1
4.7
F
C27
/50V
4.7
F
C35
Q1
Q1
100k
R5
Q10
C30
C14
100pF
R8
4.7k
L3
100
H
100pF
0.047
F
C20
C21
G
L
R
MUTE
BUZZER
FM OSC
AM OSC
VDD
GND
SD/IF
RADIO ON
ST
3V
GND
8V
4.7k
R21
DC - AC CONVERTER TOKO.INC
5CDM - 658N - 1085 TK11822M
4
12
6
12
5
3
2
1
100
H
L5
U2
39pF
C44
6pF
C50
8pF
C51
4
6
1
3
CO1
4.7k
R20
L1 :
FM RF ( KSS-SP1 : KWANG SUNG )
L2 :
FM OSC ( KSS-SP2 : KWANG SUNG )
T1 : AM IFT ( 7MC - K5050N : KR TOKO )
AM IFT ( KSI - AA1 : KWANG SUNG )
T2 : AM OSC ( A7BR - KS141010X2 : TOKO )
AM OSC ( KSI - AO5 : KWANG SUNG )
T3 : FM IFT ( A119AC - 680122X3 : KR TOKO )
FM IFT ( KSI-FA1 : KWANG SUNG )
F1 : AHCFM2 - 450BL ( TOKO )
F2 : CFE 10.7MA ( MURATA )
X2 : CDA 10.7MG65-A ( MURATA )
X1 : CFB456F - 18 ( MURATA )
H2 : KV1236Z ( TOKO )
Q3, Q4 : KV1310NT (TOKO )
1
2
3
4
5
6
7
8
9
/10V
100
F
C46
/10V
100
F
C49
C47
0.047
F
C45
0.047
F
B U 2 6 1 4 - P L L
1
2
3
4
5
6
7
8
16
11
15
10
14
9
13
12
U-COM CONTROL
100pF
270k
5.6k
A733
22k
2.2k
10k
223pF
/50V
2.2
F
10k
22pF
22pF
C11
0.047
F
5pF
C18
8pF
C29
0.047
F
R10
10
C1
8pF
C1674
0.047
F
C7
/50V
100
F
C8
C1674
0.047
F
C43
8pF
C40
20pF
C42
T2
C39
20pF
R16 560
456K
330pF
10.7M
T1
C945
C945
R2002
R2002
C48
0.047
F
100pF
100pF
0.6
4t
3
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