FM IF FOR CAR RADIO
S1A2245X01
1
INTRODUCTION
The S1A2245X01 is a monolithic integrated circuit consisting of
an FM IF amplifier and detector. It is suitable for car radios.
FUNCTIONS
3-stage IF amplifier
Peak detector
FEATURES
Suitable for FM car radios
Wide operating supply voltage range: V
CC
= 8V
-
14V
High detector output voltage (V
O
= 500mV, Typ)
Excellent AM rejection: AMR = 50dB (Typ)
High sensitivity: V
I
(LIM)
= 50dB
V (Typ)
Simplified single coil tuning
Low distortion (THD = 0.1 %: Typ)
Minimum number of external parts required
ORDERING INFORMATION
Device
Package
Operating Temperature
S1A2245X01-I0U0
7
-
SIP
-
20
C
-
+70
C
7
-
SIP
FM IF FOR CAR RADIO
S1A2245X01
3
ELECTRICAL CHARACTERISTICS
(Ta = 25
C, V
CC
= 12V, f = 10.7MHz, fm = 400Hz)
TEST CIRCUIT
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
Quiescent Circuit Current
I
CCQ
V
I
= 0
8
12
15
mA
- 3dB Limiting Sensitivity
V
l(LlM)
-3dB point from V
O
, V
I
= 80dB
,
f = 75kHz
-
50
55
dB
AM Rejection Ratio
AMR
FM:
f =
75kHz dev AM: 30 % Mod
V
l
= 80dB
-
50
-
dB
Detector Output Voltage
V
O
f =
75kHz dev V
I
= 80dB
V
300
500
700
mV
Total Harmonic Distortion
THD
f =
225kHz dev V
I
= 80dB
V
-
0.2
-
%
Signal to Noise Ratio
S/N
f =
75kHz dev V
I
= 80dB
V
-
60
-
dB
1
2
4
7
S1A2245X01
INPUT
0.01
50
0.01
0.01
C3
AF OUT
10p
C2
C1
L
Tank Coil
V
CC
0.01