參數(shù)資料
型號(hào)： T4258NFNG3
廠商： ATMEL CORP
元件分類： 接收器
英文描述： AM/FM, AUDIO SINGLE CHIP RECEIVER, PDSO44
封裝： SSOP-44
文件頁(yè)數(shù)： 25/38頁(yè)
文件大?。?/td> 443K
代理商： T4258NFNG3
31
T4258N
4566B–AUDR–02/04
Diagrams
The following data was measured with the application board (see Figure 20).
In the measurement setup, a 50
generator is terminated by 50 and connected to the
antenna input by a 50
series resistor to achieve 75 termination at the antenna input.
The generator level specified is the output voltage of this 50
generator at 50 load. If
the application board is replaced by a 75
resistor, the voltage at this resistor is 6 dB
below the specified voltage level of the 50
generator.
Figure 12. FM Demodulator
Integrated band-filter BW setting: 120 kHz (bits 0 to 2 = 0, bit 3 = 1);
1 kHz modulation frequency; 50 s de-emphasis (THD)
Figure 13. Multipath Sensor
AM modulation frequency 20 kHz; generator level 40 dBV
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0
10
20
30
40
5060
7080
90100
Frequency Deviation [kHz]
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
MPX
THD
+85°C
-40°C
+85°C
-40°C
MPX
O
u
tput
Volt
a
g
e
[
V
rm
s
]
T
HD
[%
]
0
1
2
3
4
5
0
102030
40
50
60
70
80
90
100
AM Modulation Depth [%]
+85°C
-40°C
Sensor
Out
put
Vo
lt
age
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