LA1837M
No.8271-1/9
LA1837M
370-0596 11
LA1837M AM / FM IF, MPX1 IC
SD / IF
MPX VCO
3 , 5
SD / IF
SD
AM / FM SD
AM / FM
FM
AM
RF , MIX, OSC, IF , , AGC, OSC , S , SD, IF
FM IF
IF , , S , SD, S , IF
MPX
PLL , , , VCO , ,
,
/ Ta=25
unit
VCC max
12
V
Pd max
Ta 70
550
mW
Topr
- 20 70
Tstg
- 40 125
: 114.3mm 76.1mm 1.6mm
/ Ta=25
unit
VCC
9
V
VCC op
7.0 11.0
V
61005 MS IM B8-3807
()
No. N 8 2 7 1
1 IC
LA1837M
No.8271-2/9
/ Ta=25, VCC=9.0V,
unit
min
typ
max
[FM mono ] fc=10.7MHz, fm=1kHz, VAFC - VREG=0
ICCO-FM
18
31
44
mA
VOFM
100dB, 100%mod. 16
730
1100
1460 mVrms
C.B-mono
100dB, 100%mod. 16 / 17 - 1.5
0
1.5
dB
THDFM1
100dB, 100%mod. 16
0.3
1.3
%
THDFM2
100dB, 200%mod. 16
1.0
5.0
%
S/NFM
100dB, 100%mod. 16
72
80
dB
AM
AMR
100dB, AM 30%mod. 16
45
65
dB
- 3dBL.S
100dB, 100%mod. , - 3dBdown
26
32
38
dB
LED
SDOn-FM
51
60
69
dB
LED
SDBW
100dB
85
120
170
kHz
IF
VIFBuff-FM 100dB, 13
80
120
160 mVrms
S
VSM-FM1 0dB, 11
0
0.1
0.5
V
VSM-FM2 100dB, 11
3.6
4.3
5.0
V
Mute-Att
100dB, 100%mod. 16
75
85
dB
[FM stereo ] fc=10.7MHz, 100dB, fm=1kHz, L R=90%, Pilot=10%
-L
SepL
Lmod. 16 / 17
30
45
dB
-R
SepR
Rmod. 17 / 16
30
45
dB
STON
V7 0.7V Pilot
1.3
2.7
5.0
%
STOFF
V7 4.5V Pilot
1.5
%
THD-main L Rmod. 16
0.3
1.3
%
Brej-3rd
fs=113kHz, VS=90%, Pilot=10%
40
dB
16 L-Rmod. 1kHz
Brej-5th
fs=189kHz, VS=90%, Pilot=10%
40
dB
16 L-Rmod. 1kHz
[AM ] fc=1000kHz, fm=1kHz
ICCO-AM
15
25
35
mA
VOAM1
23dB, 30%mod. 16
100
180
360 mVrms
VOAM2
80dB, 30%mod. 16
200
320
500 mVrms
S/NAM1
23dB, 30%mod. 16
18
22
dB
S/NAM2
80dB, 30%mod. 16
49
55
dB
THDAM1
80dB, 30%mod. 16
0.4
1.2
%
THDAM2
80dB, 80%mod. 16
1.0
4.0
%
LED
SDOn-AM
17
27
37
dB
VOSC-AM , 30
110
160
220 mVrms
IF
VIFBuff-AM 80dB, , 13
160
220
300 mVrms
ST-IF
VSTIF-AM 80dB, , 7
16
34
48 mVrms
S
VSM-AM
0dB,
0
0
0.2
V
LA1837M
No.8271-7/9
24
AM
0V(FM)
ro=3.3k
0.5V(AM)
22 GND
AM f
25
AM AGC
0V(FM)
R=11k
0.5V(AM)
26
AFC
Vreg
28
FM - SD
27
AM RF
Vreg
28
28
REG
Vreg
Vreg=3.6V
29
OSC
Vreg
28
30
OSC ,
1.6V(FM)
GND
FMSD
1.3V(AM)
FM SD
ro=200
ILA00807
ILA00808
24
25
ILA00809
26
ILA00810
27
ILA00811
28
ILA00812
29
ILA00813
30
10
0
--10
--20
--30
--40
--50
--60
--70
--80
--90
0
40
50
20
30
10
60
70
100
80
90
110 120
FM
ILA00814
, THD -
- %
S, V
SM
-
- V
-
- dBm
-- dB
0
40
50
20
30
10
60
70
100
80
90
110 120
-- dB
Out
VCC=9V
fc=10.7MHz
fm=1kHz, 75kHzdev
AM Out
Noise
5
4
2
3
1
0
FM THD / VSM
ILA00815
THD
VSM
VCC=9V
fc=10.7MHz
fm=1kHz, 75kHzdev
LA1837M
No.8271-8/9
Sep R
Sep L
LA1837
LA1836
IF=10.7MHz, 100dB, 75kHzdev
VS=90%
PILOT=10%
L-R
Vobat -
- dB
0
--10
--20
--70
--80
--30
--40
--50
--60
--90
, fs -- kHz
ILA00819
230
70
90
110
130
150
170
190
210
50
45
40
35
30
25
20
10
5
15
0
--
, freq -- kHz
ILA00818
2
0.01
2
3
5 7
2
3
5 7
2
3
5 7
0.1
1.0
10
, Sep -
- dB
6
4
2
0
--4
--2
--6
-- mV
-
- %
10
20
30
40
ILA00820
90
80
60
70
50
40
20
10
30
0
Rsdadj -- k
SD on -
- dB
0
8
4
6
2
10
12
14
16
ILA00821
SD
CR+
CR--
FM
AM
12
30
AM FM
700
600
500
400
300
200
100
0
0
6
4
2
8
12
10
14
20
18
16
SD
ILA00822
-
- dBm
SD BW -
- kHz
Radj -- k
--20
40
20
0
60
100
80
120
140
-- dB
0
--10
--60
--20
--30
--40
--50
--70
--80
AM
ILA00823
Noise
Out
28
26
VCC=9V
fc=1MHz
fm=1kHz, 30%mod
S / N(80dB)=58dB
--
ILA00817
5.0
4.0
3.0
2.0
1.0
0
, fc -- MHz
, THD -
- %
10.60
10.68
10.64 10.66
10.62
10.70 10.72
10.76
10.74
10.78 10.80
0.01
0.1
5 7
3
2
1.0
5 7
3
2
10
5 7
3
2
3
2
, freq -- kHz
ILA00816
FM THD
VIN=100dB
fm=1kHz, 75kHzdev
, THD -
- %
3
2
7
5
0.01
0.1
3
2
7
5
1.0
3
2
7
5
10
MAIN
MONO
SUB
ST
AM
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