U2510B
0
–20
–40
–60
6
5
4
3
2
AM
S+N(m=80%)
S+N(m=30%)
I
LED
FM
V =6V
S
f =1.6MHz
i1
N
f
=1kHz
AF
T
amb
=25°C
–80
V =6V
S
1
0
T
amb
=25°C
d(m=80%)
d(m=30%)
–100
120
120
–20 20
0
40 60 80
V ( dB V )
100
0
20
40
60
80
100
95 10404
95 10407
V ( dB V )
i
i
Figure 9. AM section: Demodulator output level
Figure 11. AM/FM level indicator current
0
2.0
V =6V
S
V =10mV
i3
f
f
T
=1MHz
=10kHz
AF
1.2
0.8
–20
–40
AF
=25°C
amb
Treble Voltage V
8
V =6V
S
–60
–80
0.4
0
f =1.6MHz
i1
T
amb
=25°C
Treble Voltage = 0
2.5
120
0
0.5
1
1.5
V ( V )
2
20
0
20 40
60
80 100
95 10406
95 10408
V ( dB V )
i
4
Figure 10. Volume control range characteristics
Figure 12. AM section: AGC voltage (at Pin 22)
TEMIC Semiconductor
Rev. A1, 06-Apr-98
7 (15)
TEMIC [ TEMIC SEMICONDUCTORS ]
