NJM2549
[DEMODULATED CHARACTERISTICS (AC Level)]
(Test Circuit 1, Ta = 25°C, V+ = 3V, IF IN = 10.7MHz / 80dBuV, fdev = ± 10kHz, fmod = 1kHz,
unless otherwise noted)
S+N, N, AMR, SINAD versus IF Input Level
(Test Circuit 1)
S+N, N , AMR , SINAD versus IF Input Level
(Test Circuit 8)
S+N
S+N
0
-10
-20
-30
-40
-50
-60
-70
70
60
50
40
30
20
10
0
0
-10
-20
-30
-40
-50
-60
-70
70
60
50
40
30
20
10
0
SINAD
SINAD
AMR
AMR
N
N
0
20
40
60
80
100
0
20
40
60
80
100
IF Input Level ( dBuV )
IF Input Level ( dBuV )
Detuning Characteristic
( VOAC, THD, S-Curve )
Detuning Characteristic
( VOAC, THD, N-Curve )
1000
100
10
4
1000
100
10
4
Circuit 1
Circuit 2
VOAC
VOAC
3
2
1
0
3
2
1
0
N-Curve
S-Curve
1
1
THD
THD
0.1
0.1
10.55 10.6 10.65 10.7 10.75 10.8 10.85
IF Input Frequency ( MHz )
10.55 10.6 10.65 10.7 10.75 10.8 10.85
IF Input Frequency ( MHz )
Demodulated Signal Level versus
FM Modulation Frequency
175
Circuit 6
fdev= ±100kHz
150
125
100
75
50
25
Circuit 5
fdev= ±10kHz
0
1
10
100
1000
10000
FM Modulation Frequency fmod ( kHz )
Ver.2010-06-24
- 16 -
NJRC [ NEW JAPAN RADIO ]
