LA1781M_09 Datasheet, PDF (47/48 Pages) Sanyo Semicon Device – For Car Radios Single-Chip Tuner IC

LA1781M
First IF Frequency Characteristics
10
FM Antenna Input Temperature Characteristics (1)
400
0
75kHz (100%mod)
300
--10
--20
--30
75Ω 300Ω
0.022μF
56 ⁵³
V.V.
0.022μF
--40
VIN
--50
80dBμ IN
7 _1.0
2 3 5 7 ₁₀
2 3 5 7 ₁₀₀ 2 3
Frequency -- MHz
FM Antenna Input Temperature Characteristics (2)
100
90
80
70
AGC ^{ON LEVEL}
S/N
60
50
AM _OUT
40
Separation
30
20
--40
--20
0
20
40
60
80
100
Ambient temperature, Ta -- °C
FM Antenna Input Temperature Characteristics (4)
50
40
80dB IN
30
20
10
40dB IN
0
--40
--20
0
20
40
20dB IN
60
80
100
Ambient temperature, Ta -- °C
AM DC Characteristics
7.0
RF AGC
VCC = 8.5V
f = 1MHz
6.0
5.0
4.0
IF ^AGC
3.0
2.0
1.0
0
--20
0
VSM
20
40
60
80 100 120 140
ANT input, IN -- dBμ
200
100
22.5kHz (30%mod)
0
--40
--20
0
20
40
60
80
100
Frequency -- MHz
FM Antenna Input Temperature Characteristics (3)
30
MUTE ^ATT
20
10
-3dB ^LS
S/N ^{= 30dB}
0
--10
--40
--20
0
20
40
60
80
100
Ambient temperature, Ta -- °C
AM I/O Characteristics
20
VCC = 8.5V
f = 1MHz
0 ^{mod = 1k 30%}
OUT
--20
--40
NOISE
--60
--80
--100
--20
0
7.0
6.0
20
40
60
80 100 120 140
ANT input, IN -- dBμ
AM Distortion
VCC = 8.5V
f = 1MHz
mod = 1k 30% 80%
5.0
4.0
3.0
2.0
1.0
0
--20
0
20
40
60
80 100 120 140
ANT input, IN -- dBμ
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