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FM FRONT END

S1A0497X01

FM FRONT END
S1A0497X01
INTRODUCTION
The S1A0497X01 is a monolithic integrated circuit designed for the FM front end of portable radio cassettes or music centers. It consists of RF AMP, local OSC buffer and mixer. Compared with conventional types, it is improved in the following characteristics: - Low supply voltage - Strong input - Spurious radiation 14-SOP 9-SIP
FEATURES
ORDERING INFORMATION
Device S1A0497X01-I0B0 S1A0497X01-S0B0 Package 9-SIP 14-SOP Operating Temperature -25°C - +75°C
S1A0497X01
FM FRONT END
BLOCK DIAGRAM
RF AMP
OSC BUFF
LOCAL OSC
VREF (8) 1 RF INPUT 2 BYPASS (11) 3 RF OUTPUT (12) 4 MIX IN (13) 5 GND (14) 6 (3) 7 (4) 8 OSC (5) 9 VCC (7)
MIX OSC OUTPUT OUTPUT
NOTE: ( ) means 14-SOP-Package NC: (1), (2), (6), (9), (10)
Characteristic Supply Voltage Power Dissipation Operating Temperature Storage Temperature PD Symbol VCC S1A0497X(9-SIP) S1A0497X(14-SOP) TOPR TSTG Value 8 600 300 - 25 - +75 - 55 - +150 °C °C Unit V mW
FM FRONT END
S1A0497X01
ELECTRICAL CHARACTERISTICS
S1A0497X01
TEST CIRCUIT
(ICCQ, VI(LIM), SUSA, GV, VOSC, VSTOP)
1000pF
0.01µF 100µF
( ) : KA22497D
100 L 0.01µF 330 C1 C2 10pF 15k T3 0.01µF Tank coil Vcc (14) (3) (4) (5) (7)
S1A0497X01
KSC838-0 330 0.01µF C.F Vosc 150pF T2 0.01µF 0.01µF
4.7pF
S1A2245X01
FM MPX
100pF
FM FRONT END
S1A0497X01
COIL SPECIFICATIONS (BOTTOM VIEW)
T1 (L1) FM RF
In a Diameter of 5.5 mm f (MHz) 98 QO 100 Turns 4 0.8 mm UEW
T2 (L2) FM OSC
In a Diameter of 5.5 mm f (MHz) 98 QO 100 Turns 3 0.8 mm UEW
T3 FM IFT
CO (pF) 1-3 75
f (MHz) 10.7
QO 1-3 115
Turns 1-3 12 4-6 1 KOREA TOKO 0.12 mm UEW
S1A0497X01
FM FRONT END
T1 (L1) FM RF
F (MHz) 98 KSS-SP1
Qo 100
Turns 4
KWANG SUNG PART NO KSS-SPI
T2 (L2) FM RF OSC
F (MHz) 98 KSS-SP2
Qo 100
Turns 3
KWANG SUNG PART NO KSS-SP2
T3 FM IFT
C 0 (pF) 1-3 75
F (MHz) 10.7
Q0 1-3 115
Turns 1-3 12 4-6 1
KWANG SUNG PART NO KSI-FA1
KSI-FA1
FM FRONT END
S1A0497X01
f(KHz), LOCAL OSCILLATION FREQUENCY DEVIATION
LOCAL OSCILLATION FREQUENCY DEVIATION, LOCAL OSCILLATION VOLTAGE.SUPLY VOLTAGE 100 300
VOSC(mV), LOCAL OSCILLATION VOLTAGE VOSC(mV), LOCAL OSCILLATION VOLTAGE
0 2 4 6 8 10 VCC(V), SUPPLY VOLTAGE QUIESCENT CIRCUIT CURRENT-SUPPLY VOLTAGE 0
0 -20 0 20 40 60 Ta(°C), AMBIENT TEMPERATURE SENSITIVITY-SUPPLY VOLTAGE 40 80
10 ICCQ (mV), QUIESCENT CIRCUIT CURRENT VI(LIM) (dBµ), -3dB LIMITING SENSITIVITY SUSA (dBµ), USABLE SENSITIVITY
SUSA 10 VI(LIM) 0 0 2 4 6 8 VCC(V), SUPPLY VOLTAGE 10
0 0 2 4 6 8 VCC(V), SUPPLY VOLTAGE 10
f(1KHz), LOCAL OSCILLATION FREQUENCY DEVIATION
SUSA 10 VI(LIM) 0 -20 0 20 40 60 Ta(°C), AMBIENT TEMPERATURE 80
-200 -20 0 20 40 60 Ta(°C), AMBIENT TEMPERATURE 80
S1A0497X01
FM FRONT END
APPLICATION INFORMATION
RF AMP The RF AMP is a common base type, so the operating frequency range is improved. The GND of the bypass capacitor (Pin 2) should be located closely at Pin 5 (GND). When using the bypass capacitor at VCC-line of Pin 3. We can expect an improvement of the S / N ratio.
FM ANT BIAS
1000p
T1 VCC
MIXER The mixer stage uses a double balanced type in order to protect the leakage of OSC, spurious radiation. Also, this is built into the limiter in order to improve the strong input characteristic.
VCC IF AMP
MIX OUT
OSC OUT MIX IN
FM FRONT END
S1A0497X01
LOCAL OSCILLATION
The local oscillator uses a colpitts oscillator for stable oscillation at high frequency. This is built into the OSC buffer in order to stably operate the OSC frequency and OSC voltage at strong input.
OSC BUFF
S1A0497X01
C5 R5 0.047µF
X2 G Q1 R2002 C26 4.7µF / 50V R C27 4.7µF / 50V C4 0.068µF C15 450K 0.082µF C16
T1 C14 1µF X1 456K
0.022µF
330pF
APPLICATION CIRCUIT
0.018µF
0.022µF
0.01µF
0.047µF
100µF / 50V
R1 33k
C42 20pF
C40 8pF C39 20pF
0.022µF
0.01µF
C18 8pF
C1 8pF
R17 100k
R9 33k C32
4.7µF / 50V
R13 120
100pF R5 100pF C20
0.047µF
100µ H
100pF
C45 0.047µF CO1 C44
U2 5.6k 39pF
L5 100µH
C48 0.047µF
C49 100µF / 10V
BU2614 - PLL
GND 22pF 22pF R21
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 )
C46 100µF / 10V
DC - AC CONVERTER
TOKO.INC
8V 4.7k
U-COM CONTROL
4.7k C51 8pF 6pF C47 0.047µF C50
Q1 R2002 L SW1 C35 4.7µF / 50V R6 2.7k R3 10k R4 Q7 C945 10k R7 390
S1A0497X 0 1 FM FRONT END
C24 4.7µF / 50V
C30 100pF R12 1k C41 0.022µF C38 470pF Q6 C945
F2 10.7MHz
S1A2298A0 1 IF + MPX
C12 0.047µF
C2 5pF
470pF
C6 15pF
C11 0.047µF
BUZZER
Q4 Q10 C1674 AM ANT T2
FM OSC
C29 0.047µF
R10 10
AM OSC
GND C21 0.047µF SD / IF
10k 223pF 2.2µF / 50V 10k 2.2k
RADIO ON
FM RF ( KSS-SP1 : KWANG SUNG )
5CDM - 658N - 1085
TK11822M R20
FM FRONT END