AM/FM TUNER + MPX S1A2298A01
INTRODUCTION
The S1A2298A01 is a monolithic integrated circuit which consists 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.
24−SDIP−300
FEATURES
• AM/FM IF, 1 Chip for DTS
• Wide Operating Voltage: VCC = 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
1
S1A2298A01 AM/FM TUNER + MPX
FM
MPX
R-
BLOCK DIAGRAM
FMIFINAM
AMIFINIF
MIX
BYPASS
24 23 22 21 20 19 18 17 16 15 14 13
FM
IF
AM
MIX
OSCSSC AGC
1 2 3 4 5 6 7 8 9 10 11 12
SWAMOSC
AMIFFM
AM
IF
BF
AMOSC
OUT
QUAD
FM
DET
ECL
AM
DET
CC
V
DET
OUT
AM
LOWOUT
MPX
IN
AF
BF
AGCINIF
LPF1 LPF2 VCO L-OUT R-OUT
PIT
PHA
DET
REQIFCONUNTTULEDSTLED
AM/FM
MO/ST
EVEL
SW
SW
PIL
DET
DET
TU
LED
VOC
ST
LED
DECODE
HYSECL
GND
PIN CONFIGURATION
FMIF
INPUTAMMIX
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
INPUTIFSW
BYPASS
AM
IF
AMOSC
OUTPUT
QUAD
VCC
DET
OUT
INPUT
S1A2298A01
AM
LOWCUT
AGC
LPF1 LPF2 VCO L-OUT
IF
REQIFCOUNTTULEDSTLED
OUT
GND
2
AM/FM TUNER + MPX S1A2298A01
PIN FUNCTION
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
VCC 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
ABSOLUTE MAXIMUM RATING (Ta = 25°C)
Characteristic Symbol Value Unit
Supply Voltage V
Power Dissipation P
Operating Temperature T
Storage Temperature T
CC
D
OPR
STG
8 V
1200 mW
−20 − +75 °C
−55 − +150 °C
3
S1A2298A01 AM/FM TUNER + MPX
ELECTRICAL CHARACTERISTICS
(Ta = 25 °C, VCC = 3 V, unless otherwise specified)
• FM: fC = 10.7MHz, fm = 1kHz, ∆f = 22.5kHz, SW1 = 10kΩ
• AM: fC = 1MHz, fm = 1kHz, MOD = 30%, SW1 = 10kΩ
• MPX: fm = 1kHz, L + R = 90%, Pilot = 10%, VI = 150mV
Characteristic Symbol Test Conditions Min. Typ. Max. Unit
Quiescent Circuit Current
-3 dB Limiting Sensitivity
Detector Output Voltage
Signal to Noise Ratio
AM Rejection Ratio
Total Harmonic Distortion
Lamp On Level
IF Countout Frequency 1
FM
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
Detector Output Voltage 1
Detector Output Voltage 2
Total Harmonic Distortion
Signal to Noise Ratio
Lamp ON Level
AM
Oscillation Voltage
IF Count Voltage
IF Count Sensitivity 5
IF Count Sensitivity 6
IF Count Sensitivity 7
IF Count Sensitivity 8
I
CCQ1
I
CCQ2
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
V
O
THD
S/N
V
L(on)
V
OSC
V
if
S
if5
S
if6
S
if7
S
if8
FM, VI = 0
AM, VI = 0
VO = −3dB
VI = 80dBu
VI = 80dBu
VI = 80dBu
VI = 80dBu
VI = variable
VI = 20dBu
VI = 80dBu
VI = 61dBu
VI = 61dBu
SW1 = 0, SW2 = GND
SW1 = 0.51kΩ, SW2 = GND
SW1 = 0, SW2 = Vcc
SW1 = 0.51kΩ, SW2 = Vcc
VI = 26dBu
VI = 60dBu
VI = 60dBu
VI = 60dBu
VI = variable
VI = 0
VI = 39dBu
SW1 = 0, SW2 = GND
SW1 = 0.51kΩ, SW2 = GND
SW1 = 0, SW2 = Vcc
SW1 = 0.51kΩ, SW2 = Vcc
6.5
7
41
50
55
−
−
44
−
1,3374
350
350
69
61
70
62
10
50
−
31
21
300
350
42
35
42
35
9.5
10
46
75
65
38
0.2
49
10.7
1,3375
500
500
76
68
77
69
57
75
1
41
26
500
500
49
42
49
42
13.5
14
51
100
−
−
1.0
54
−
1,3376
−
−
83
75
83
76
85
100
2
−
31
−
−
56
49
56
49
mA
mA
dBu
mV
dB
dB
%
dBu
MHz
MHz
mVpp
mVpp
dBu
dBu
dBu
dBu
mV
mV
%
dB
dBu
mV
mV
dBu
dBu
dBu
dBu
4
AM/FM TUNER + MPX S1A2298A01
Characteristic Symbol Test Conditions Min. Typ. Max. Unit
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
%
%
5
S1A2298A01 AM/FM TUNER + MPX
* CDA 10.7MG 65-A (MURATA)
TEST CIRCUIT
220
F
µ
100kΩ
KSC945
KSC945
100kΩ100kΩ
0.022µF
100kΩ
3kΩ
3kΩ
Vcc1
MPX
OUT
SW10
220µF
0.1µF
LPF
SW9
SW8
Vcc2 (8V)
4.7kΩ
390 Ω
F
10
µ
AMFM
SW5
2.2µ
F
DCT OUT
MPX IN
330pF
BA
24kΩ
6800pF
0.033 µF
C-F
F
450B
4.7µF
4.7µF
0.01 µF 0.01 µF
12kΩ
8
CSB456F1
C-F
0.082 µF
STOP
VCO
15 14 13
16
17
S1A2298A01
SW7
0.082
µ
SW6
AM FM
22kΩ
0.068 µF
330pF
1kΩ
* 10.7MHz
20 19 18
15pF
0.022 µF
22 2124 23
T
2
C-F
10.7MAS
L
270 Ω
VCO
220k Ω
BA
560 Ω
0.01µF
51Ω
10k Ω
SW3
0.022 µF 4.7µF
0.01µF
51pF
F
560 Ω
100 µF
0.022 µF
T1
SW2
2.2mH
100kΩ
0.022
µ
9 10 11 12
8
BA
OFF ON
5 6
C
SW1
B
A
1 2 3 4 7
2K
0.022µF
1SV10
0
A B
1/8 IF IF
51Ω
50 Ω
50Ω
AM RF IN
6
AM/FM TUNER + MPX S1A2298A01
AM IFT
COIL CIRCUIT
No Function
of
(kHz)
Q
L
(uH)
P
(pF)
1-2 2-3 1-3 1-4 4-6
Turns Write
(mmφ)
T1 AM OSC 796 115 288 − 13 73 − − 32 0.08
T2 AM IFT 455 120 − 75 − − 180 − 15 0.06
V/D
PIN3
VCC
AM OSC
Pin 3
Vcc
V/D
T1
3
2
1
3
2
1
KSI-AO5
4
6
4
NO
6
(kHz)
VCC
PIN23
F
3
2
1
Qo Turns C.L
4-6 1-2 2-3
T1 796 115
32 13 73
T2
4
C.F
VCC
6
KWANG SUNG
PART NO
288
uH
KSI-AO5
Vcc
Pin 3
3
1
KSI-AA1
4
CF
6
Vcc
T2 455 120
14 146
4-6 1-3
180
pF
KSI-AA1
7
S1A2298A01 AM/FM TUNER + MPX
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 1.5kΩ.
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 Ω, 0.51 KΩ, 10 KΩ) regulating the AM mixer and FM IF gain.
When SW2 is VCC, 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 6.1kΩ, SIGNAL WAVE FORM is the rectangle wave, and the voltage scale of the OSC buffer
OUTPUT is 500mVp-p.
5) MPX
INPUT IMPEDANCE: 25kΩ
OUTPUT IMPEDANCE: 5kΩ
8
AM/FM TUNER + MPX S1A2298A01
APPLICATION CIRCUIT
C-F
450kHz
C-F
10.7MHz
FM IF-IN
0.022µF
22 2124 23
MONO
* 10.7MHz
0.1µF
20 19 18
S1A2298A01
0.068µF
17
4.7kΩ
AM FM
0.047µF
16
SW7
C-F
0.082µF
CSB456F18
15 14 13
0.01µF 0.01µF
R-OUT
L-OUT
1 2 3 4 7
AM
ANT
IF
1/8 IF
OSC
OUT
5 6
0.022µF
4.7µF
9 10 11 12
8
IF
RFOIFOUT
0.01µF0.01µF
560
560
Ω
Ω
GND
* CDA 10.7MG 65-A (MURATA)
9
S1A2298A01 AM/FM TUNER + MPX
DC - AC CONVERTER TOKO.INC
5CDM - 658N - 1085 TK11822M
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 )
APPLICATION CIRCUIT
U-COM CONTROL
GLR
/50V4.7µF
C35
Q1
R2002
C5
/50V
4.7µFC27
SW1
C26
Q1
4.7kΩ
0.047µF
R5
C15
C4
330pF
X2
10.7M
0.022µF
C13
F1
R2002
0.068µF
R3
10kΩ
/50V4.7µF
/50V4.7µF
C24
13
14
X1
456K
15
C16
0.082µF
17 16
18
1µF
C14
19
20
S 1 A 2 2 9 8 A 0 1
21
22
23
24
T1
R7
390Ω
R6
2.7kΩ
FM FRONT END
S 1 A 0 4 9 7 X 0 1
2 3 4 5 6 7 8 9
1
Ω
R4
10k
Q6
C945
0.018µF C22
0.018µF C23
12
11
10
9
8
7
6
IF + MPX
5
4
3
2
1
F2
10.7MHz
Q5
C1674
C30
100pF
T3
C2
5pF
C12
0.047µF
BPF
MUTE
BUZZER
Q7
C945
R16 560Ω
R15 560Ω
0.01µF
C34
4.7µF
/50V
C32
0.022µF
C33
0.01µF
C31
C38
470pF
20pF
C39
R14 100kΩ
20pF
C42
C41
8pF
C40
0.022µF
100kΩ
R17
0.022µF
C36
R13
120Ω
R12
1kΩ
0.047µF
C7
100µF
/50V
C8
L1
C6
15pF
C1
8pF
C3
470pF
L2
§Ü
C18
8pF
C17
470
R9
33kΩ
C11
0.047µF
VDD
FM OSC
AM OSC
T2
AM ANT
0.047µF
C43
100pF
C20
Q10
C1674
R5
100kΩ
Q3
C14
100pF
33kΩ
R1
Q4
R10
10Ω
C29
0.047µF
ST
GND
SD/IF
RADIO ON
100µF
/10V
R20
4.7kΩ
C46
0.047µF
C47
4
3
6pF
C50
8pF
C51
/10V100µF
12
2
4 613CO1
3V
8V
GND
R21
4.7kΩ
C49
C48
0.047µF
0.047µF
H
C45
L5U2
100µ
6125
1
C44
39pF
A733
270kΩ5.6kΩ
100pF
9
10
100pF
11
100pF
12
13
14
22k
Ω
B U 2 6 1 4 - P L L
Ω
2.2k
10kΩ
223pF
/50V2.2µF
10kΩ
C21
0.047µF
4.7kΩ
100µH
L3
R8
3
4t
¥÷
15
16
22pF
22pF
1 2 3 4 5 6 7 8
0.6
L1 :
FM RF ( KSS-SP1 : KWANG SUNG )
L2 :
10
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