LA1193M_08 SANYO [Sanyo Semicon Device], LA1193M_08 Datasheet - Page 13

• Manufacturer Part Number: LA1193M_08
• Description: High-Performance FM Front End
• Manufacturer: SANYO [Sanyo Semicon Device]

• Wide AGC circuit
• 3D-AGC
-100
The wide AGC sensitivity is set by the value of the capacitor on pin 8. However, since incorrect operation due to the
local oscillator signal may occur if this capacitor is too large, its value must be chosen carefully.
If the difference in sensitivity between the N-AGC and the W-AGC systems is too large during 3D-AGC operation,
the S/N ratio can be degraded in the vicinity of the input where the AGC switches. Therefore, the 3D-AGC setting
values must be selected carefully. Although this problem can be ameliorated by applying a time constant to pin 20, in
principle, this S/N ratio degradation should be prevented by limiting the sensitivity difference between the two AGC
systems.
500
400
300
200
100
600
-20
-40
-60
-80
50
40
30
20
10
0
0
-40
0
-20
50
3SK251+LA1193M or 1193V+LA1145M
When mounted on a 23×36×1.6mm
printed circuit board
3SK251 + LA1193M or 1193V + LA1145M
V CC = 8.0V
fr = 83MHz
fm = 1kHz
dev = 22.5kHz
fuD = f r ± ∆ f
non dev
Two-signal interference characteristics
Dummy two - signal input
60
0
-20
75Ω 24Ω
75Ω 24Ω
V CC = 8.0V, fr = 83MHz
fm = 1kHz, dev22.5kHz
Audio Filter, IHF-BPF T/200
Interfering station input level -- dBµ
20
70
Ambient temperature, Ta -- °C
Antenna input level -- dBµ
0
I/O characteristics
24Ω
Pd max -- Ta
40
80
20
input
ANT
60
AM OUT 30%mod
90
S+N
V SM
THD
40
N
100
80
3
glass epoxy
fm
60
100
110
=
1kHz
[LA1193V]
80 85
120
120
JK119329
JK119331
JK119333
LA1193M, 1193V
100
140
130
8
6
4
2
0
-100
500
400
300
200
100
600
-20
-40
-60
-80
20
40
30
20
10
40
50
0
0
0
-40
-20
50
3SK251 + LA1193M or 1193V + LA1145M
V CC = 8.0V
fr = 83MHz
fm = 1kHz
dev = 22.5kHz
fuD = f r ± ∆ f
non dev
When mounted on a 41×30×1.1mm
V CC = 8.0V
f D = fr = 83MHz
fm = 1kHz
dev = 22.5kHz
printed circuit board
Two-signal interference characteristics
Dummy two - signal input
0
60
-20
75Ω 24Ω
75Ω 24Ω
f D S + N
Interfering station input level -- dBµ
20
70
Ambient temperature, Ta -- °C
Antenna input level -- dBµ
0
I/O characteristics
75Ω
40
Pd max -- Ta
80
f D N
20
input
60
ANT
f D V SM
90
80
40
100
100
3
glass epoxy
60
110
Mix
120
fuD V AGC
[LA1193M]
fuD N
fuD V SM
fuD S + N
80 85
120
140
JK119330
JK19332
JK119334
13
510Ω
51pF
No.4715-13/22
100
160
130
14
12
10
8
6
4
2
0