AM/FM TUNER + MPX
S1A0900X01
1
INTRODUCTION
The S1A0900X01 is a monolithic integrated circuit which con-
sists of a 3V one-chip tuner and FM multiplex for AM/FM radios
and head-phone radios.
FUNCTIONS
FM Stage: RF/IF/AF amp, Quadrature Detector, MIX, OSC,
Tuning Indicator.
AM Stage: RF/IF/AF amp, Detector, MIX, OSC, AGC, Tuning
Indicator.
MPX Stage: PLL amp, Decoder, Flip Flop, VCO Stop, Phase
Detector, Stereo Indicator.
FEATURES
3 V one-chip tuner with built-in FM Multiplex
No AM detect coil, IF coupling capacitor, FM IF by-pass capacitor needed
Built-in tuning indicator function
Built-in AM/FM selection switch
Minimum number of external parts required
Wide operating voltage range: V
CC
= 1.8V
-
7V
Low distortion (FM IF: 0.4%, AM IF: 1%, 0.2% (Typ)
OPDERING INFORMATION
Device
Package
Operature Temperature
S1A0900X01-A0B0
24
-
SDIP
-
300
-
20
C
-
+75
C
S1A0900X01-S0B0
24
-
SOP
-
375
24
-
SDIP
-
300
24
-
SOP
-
375
AM/FM TUNER + MPX
S1A0900X01
3
ELECRTRICAL CHARACTERISTICS
(Ta = 25
C, V
CC
= 3V, unless otherwise specified)
FM F/E: f = 98MHz, fm = 1kHz,
f = 22.5kHz, AM: f = 1kHz, 30 % Mod
FM IF: f = 10.7MHz, fm = 1kHz,
f = 22.5kHz, MPX: f = 1kHz, L + R = 90 %, P = 10%, V
I
= 150mV
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
Test Circuit
Quiescent Circuit Current
I
CCQ1
FM, V
I
= 0
8.4
13.2
20.0
mA
1
I
CCQ2
AM, V
I
= 0
4.4
8.4
13.4
mA
1
F/E
-3 dB Limiting Sensitivity
V
I (LIM)1
V
O
=
-
3dB
-
10
-
dB
1
Oscillation Voltage
V
OSC
f
OSC
= 98MHz
40
70
110
mV
2
FM
IF
-3 dB Limiting Sensitivity
V
I(LIM)2
V
O
=
-
3dB
40
46
53
dB
1
Detector Output Voltage
V
O (DET)1
V
I
= 80dB
55
80
110
mV
1
Signal to Noise Ratio
S/N
1
V
I
= 80dB
60
70
-
dB
1
Total Harmonic Distortion
THD
1
V
I
= 80dB
-
0.4
1
%
1
AM Rejection Ratio
AMR
V
I
= 80dB
22
32
-
dB
1
Tuning Indication Voltage
V
LI
I
LED
= 1mA
45
51
56
dB
1
AM
IF
Voltage Gain
G
V1
V
I
= 26dB
40
70
110
mV
1
Detector Output Voltage
V
O(DET)2
V
I
= 60dB
55
80
110
mV
1
Signal to Noise Ratio
S/N
2
V
I
= 60dB
32
42
-
dB
1
Total Harmonic Distortion
THD
2
V
I
= 60dB
-
1
2
%
1
Tuning Indication Voltage
V
L2
I
LED
= 1mA
20
25
30
dB
1