LA1823_06 Datasheet, PDF (11/12 Pages) Sanyo Semicon Device – Single-Chip Tuner ICs for Use in Radio Cassette Recorder

Continued from preceding page.
Pin
number
Function
21
VCC2
22
FM-RF output
24
FM-RF input
LA1823, LA1823M
Quiescent
voltage (V)
AM
FM
4.5
4.4
Remarks
FM-FE block VCC
Power is supplied from pin 4 (VCC1) via
external resistor (10Ω)
4.5
4.4 Connect the FM-RF coil between this pin
and pin 21 (VCC2)
0
0.9
Rin = 1.8kΩ
23
GND2
0
0 FM-FE block ground
Equivalent circuit
R
21
4
22
21
24
Rin
FM Characteristics
0
--20
Signal
--40
AM out
--60
--80 ^VCC=4.5V
fc=98MHz
Noise
fm=1kHz, 22.5kHz dev
--100 ^AM=30%mod
--20
0
20
40
60
80 100 120 140
Input – dBµV EMF
AM Characteristics
0
VCC=4.5V
fc=1000kHz
fm=1kHz, 30%mod
--20
Signal
--40
--60
Noise
--80
--100
--20
0
20
40
60
80 100 120 140
Input – dB/m
FM Characteristics
5
VCC=4.5V
fc=98MHz
fm=1kHz
4
3
2
1
THD(75k)
0
THD(22.5k)
--20
0
20
40
60
80 100 120 140
Input – dBµV EMF
AM Characteristics
5
VCC=4.5V
2.5
fc=1000kHz
fm=1kHz, 30%mod
4
2.0
3
1.5
2
1.0
1
VAGC
0.5
0
--20
0
0
20
40
60
80 100 120 140
Input – dB/m
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