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參數資料
| 型號： | LA7775M |
| 元件分類： | 接收器 |
| 英文描述： | FM, AUDIO DEMODULATOR, PDSO24 |
| 封裝： | MFP-24 |
| 文件頁數： | 2/5頁 |
| 文件大小： | 96K |
| 代理商： | LA7775M |
No. 5736-2/5
LA7775M
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Current drain
ICCO
20
26
mA
Preamplifier input capacitance
Ci21
100 MHz
7
pF
Preamplifier input resistance
Ri21
100 MHz
1
k
Preamplifier voltage gain
Gp
350 MHz
15
dB
Mixer input capacitance
Ci24
100 MHz
7
pF
Mixer input resistance
Ri24
100 MHz
1
k
Mixer conversion gain
Gc
350 MHz
25
dB
–3 dB limiting sensitivity
Vi
F = 75 kHz dev, at 1 kHz
10
16
dB
Demodulation output
Vo
F = 75 kHz dev, at 1 kHz
180
250
mVrms
SAW switching threshold level
V19TH
1.35
1.50
1.65
V
Data output high level
V18H
4.5
V
Data output low level
V18L
0.5
V
Oscillator output
V2
117.2 MHz
0.35
Vp-p
Operating Characteristics at Ta = 25°C (VCC = 5 V, fo = 106.5 MHz, fIF = 10.7 MHz)
Equivalent Circuit Block Diagram and Test Circuit
PRE AMP
LIM.AMP
FM DET
OSC
RF GND
MIXER
SFE10.7MS2
117.2
MHz
119.2
MHz
390
510
1k
2 k
1 k
330
390
10 k
10 k
DATA
SHAPER
24
23
22
21
20
19
18
17
16
15
14
13
123456789
10
11
12
220 pF
470 pF
470
pF
0.1
F
0.01
F
0.01
F
0.033
F
43
pF
0.033
F
0.01
F
47
F
1
H
3.9
H
0.01F
1000 pF
20
pF
20 pF
6 pF
20 pF
2200
pF
13
pF
2200
pF
5 pF
100
nH
GND
OSC
OUTPUT
VCC
T00078
LO
SELECT DATA
OUTPUT
RF
INPUT
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