U2510B-MT
| Model | U2510B-MT |
| Description | All-Band AM/FM Receiver and Audio Amplifier |
| PDF file | Total 15 pages (File size: 266K) |
| Chip Manufacturer | ATMEL |
U2510B
The alignment of the LC-discriminator circuit should be
done with little or no effect on the AFC function. This can
be realized by:
–
switching Pin 21 to open-circuit
–
connecting Pin 1 to a voltage source of 2 V
–
using a low signal level for alignment.
In general, ceramic discriminator devices can be used,
too. In this case, the effect of unavoidable spreads in the
frequency characteristics of these case ceramic devices in
conjunction with the IC characteristic has to be consid-
ered. For example, mismatches of the characteristics
between selectivity block and FM discriminator will lead
to an increased signal-to-noise ratio at low signal level as
well as to a higher demodulation distortion level or to an
asymmetrical AFC.
Application Circuits
Antenna
FM
AM
L
3
C
16
33 pF
C
18
33 pF
C
17
33 pF
L
4
C
7
C
6
T
4
C
25
100 pF
C
2
2 pF
C
3
22 pF
L
1
L
2
C
4
27 pF
T
2
C
5
6 pF
Volume
P
1
50 kΩ
4.7
µF
22 nF
C
8
4.7
µF
AM IFT
T
1
455 kHz
CF
1
14
13
12
11
10
9
8
7
6
5
4
3
C
24
18 pF
2
1
U2510B
15
16
CF
2
10.7 MHz
R
1
390
Ω
10 nF
100 nF
C
14
S
2
C
10
AM
FM
4.7
µF
10 nF
4.7
µF
470
µF
C
11
C
12
C
13
17
18
19
20
21
22
23
C
9
C
15
220
µF
S
1
24
25
26
27
28
V
S
Z=8
Ω
13915
Figure 17. Application circuit (low cost)
Rev. A3, 23-Feb-01
11 (15)
