AM/FM TUNER + MPX
S1A0901X01/A01
1
INTRODUCTION
The S1A0901X01/A01 is a monolithic integrated circuit which
consists of a one-chip tuner and a no adjustment FM multiplex
for AM/FM radios and headphone radios.
FEATURES
One chip tuner with built-in FM Multiplex
No adjustment for FM detector and VCO
No AM detect coil, IF coupling capacitor, FM IF
bypass capacitor needed
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%, MPX: 0.2% (Typ))
ORDERING INFORMATION
Device
Package
Operating Temperature
S1A0901X01-A0B0
24
-
SDIP
-
300
-
20
C
-
+75
C
S1A0901A01-S0B0
24
-
SOP
-
375
24
-
SOP
-
375
24
-
SDIP
-
300
AM/FM TUNER + MPX
S1A0901X01/A01
3
ELECTRICAL CHARACTERISTICS
(Ta = 25
C, V
CC
= 3 V, unless otherwise specified)
FM F/E: f = 98MHz, fm = 1kHz,
f = 22.5kHz AM: f = 1MHz, fm = 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
10
14
18
mA
1
I
CCQ2
AM, V
I
= 0
3.5
6.0
9
mA
1
F/E
-3 dB Limiting Sensitivity
V
I (LIM)1
V
O
=
-
3dB
10
14
18
dB
1
Oscillation Voltage
V
OSC
f
OSC
= 98MHz
70
105
140
mV
2
FM
IF
-3 dB Limiting Sensitivity
V
I(LIM)2
V
O
=
-
3dB
39
44
49
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
40
50
-
dB
1
Tuning Indication Voltage
V
LI
I
LED
= 1mA
39
44
49
dB
1
AM
IF
Voltage Gain
G
V1
V
I
= 23dB
20
40
80
mV
1
Detector Output Voltage
V
O(DET)2
V
I
= 60dB
50
60
100
mV
1
Signal to Noise Ratio
S/N
2
V
I
= 60dB
34
44
-
dB
1
Total Harmonic Distortion
THD
2
V
I
= 60dB
-
1
2
%
1
Tuning Indication Voltage
V
L2
I
LED
= 1mA
19
24
30
dB
1
PDF 
ZIP
