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參數(shù)資料
| 型號： | U4240B |
| 英文描述： | AM - RECEIVER |
| 中文描述： | 上午-接收機 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大?。?/td> | 112K |
| 代理商： | U4240B |
TELEFUNKEN Semiconductors
U4240B
Rev. A1: 12.07.1995
4 (8)
Unit
Max.
Typ.
Min.
Symbol
Test Conditions / Pins
Parameters
Oscillator frequency output, R
L10
= 2.2 k
Output voltage
DC output voltage
Output resistance
Output current
IF amplifier and demodulator
DC input voltages
Input impedance
Pin 12
V
O
V
O
R
O
I
O
320
0.9
170
mV
pp
V
3
mA
p
Pins 3 and 4
Pins 3
V
i
R
i
C
i
V
i
2
3
7
55
V
k
pF
mV
2.4
3.9
Maximum IF input voltage
IF output voltage,
without load
IF output resistance
Control range
Audio output voltage,
without load
Audio output resistance
m = 80%, d = 3%,
V
i
= 10 mV (Pin 3/4)
Pin 3
Pin 10
Pin 10
V
o
R
o
V
i
230
280
50
50
340
mV
V
oAF
= 6 dB
V
i
= 1 mV
dB
(Pin 3/4)
Pins 6 and 9
Pin 6
Pin 9
Pin 11
V
o
R
o
310
3.5
12
mV
k
2.9
9
4.2
15
Field strength indication
DC indicator voltages
R
L11
= 2.7 k , V
i
= 0
R
L11
= 2.7 k ,
V
i
= 500 mV
V
o
2.5
2.0
100
2.8
3.1
mV
V
Output current capability
Output resistance
Reverse voltage at the
output
Standby switch
Switching voltage
I
o
R
o
mA
–I
o
= 0.5 mA
AM switch OFF,
I
o
1 A
150
V
o
6
V
Pin 2
V
I
4 V
BE
(2.75)
V
Required control voltage
AM-ON
AM-OFF
AM-ON, V
2
= 0
AM-OFF, V
2
= 12 V
1)
V
I
V
I1)
–I
I
3.5
2
V
Input current
I
I
200
10
A
1)
or open input
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