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参数资料
| 型号： | NTE875 |
| 厂商： | NTE Electronics, Inc. |
| 英文描述： | Integrated Circuit Video IF Amplifier/PLL Detector System |
| 中文描述： | 集成电路视频中频放大器/锁相环检测系统 |
| 文件页数： | 2/4页 |
| 文件大小： | 32K |
| 代理商： | NTE875 |
DC Electrical Characteristics:
(T
A
= +25
°
C, V
IF
=
ν
DET
= 0, V
PH
= 4V, V
COMP
= 4V, and all
switches in position 0 (open) unless otherwise specified)
Symbol
Test Conditions
I
1
+ I
2
V
AGC
= 6.7V, V
COMP
= 6V
V
5
V
AGC
= 6.7V, SW4 Position 1
V
7
, V
8
V
AGC
= 2V, SW2, 3, 4 Position 1
V
6
–
V
9
V
AGC
= 2V, SW2, 3, 4 Position 1
V
3
, V
4
V
AGC
= 2V, SW2, 3, 4 Position 1
I
1
V
AGC
= 9V, SW2, 3, 4 Position 1,
Measure V
1
, I
1
= (12
–
V
1
)/50
V
3
, V
4
V
AGC
= 9V, SW2, 3, 4 Position 1
V
28
V
AGC
= 6.7V, SW1, 4 Position 1
V
24
, V
25
V
AGC
= 6.7V, SW1, 4 Position 1
V
23
, V
26
V
AGC
= 6.7V, SW1, 4 Position 1
V
19
, V
20
V
AGC
= 6.7V, SW1, 4 Position 1
V
17
SW1, 2 Position 1, Adjust V
COMP
for
I
13
= 0
I
13
SW1, 2, 4 Position 1
I
13
SW1, 2 Position 1, V
COMP
= 3.5V
I
13
SW1, 2 Position 1, V
COMP
= 4.5V
I
11
V
AGC
= 2V, All Switches Position 1,
Measure V
11
, I
11
= (12
–
V
11
)/6000
I
11
V
AGC
= 10V, All Switches Position 1,
Measure V
11
, I
11
= (12
–
V
11
)/6000
Parameter
Min
35
5.8
3.2
–
2.3
3.1
Typ
60
6.4
3.7
0
3.0
5.5
Max
80
7.0
4.1
±
30
3.6
7.8
Unit
mA
V
V
mV
V
mA
12V Supply Current
IF Regulator Voltage
IF Input Voltage
IF Decouple Offset
IF Peaker Voltage (Max Gain)
IF Output Current
IF Peaker Voltage (Min Gain)
Detector Input Voltage
Limiter Tank Voltage
AFC Tank Voltage
VCO Tank Voltage
AGC Sync Threshold
5.5
4.3
6.4
4.3
4.7
3.8
6.2
4.9
7.0
4.9
5.2
4.0
–
V
V
V
V
V
V
5.5
7.6
5.5
5.7
4.2
AGC Filter Leakage Current
AGC Filter Charge Current
AGC Filter Discharge Current
RF AGC Leakage Current
–
0
±
5
2.8
μ
A
mA
mA
μ
A
1.6
–
0.45
–
0.70
–
0.90
–
0
2.2
20
RF AGC Output Current
1.5
1.8
–
mA
Detector AC Set–Up Procedure:
(SW1, 4 position 1, V
AGC
= 0V)
1. Apply
ν
DET
= 10mV
rms
, 45.75MHz CW at the detector input. Tune L1 for maximum AC signal
at Pin25, measured with a 10x FET probe or through a 1pF capacitor to prevent loading of
the limiter tank.
2. Increase
ν
DET
to 60mV
rms
. Adjust L3 until the PLL locks, as indicated by a DC voltage at
the video output Pin16.
3. With the detector locked, adjust L3 for 4V at Pin18.
4. Adjust V
PH
for maximum detector efficiency by monitoring Pin16 for a minimum DC voltage.
5. Adjust L2 for 3.0V at Pin27 (on sensitive slope of AFC curve).
AC Electrical Characteristics:
(T
A
= +25
°
C, Detector set
–
up as above, f = 45.75MHz,
V
AGC
= 6.7V, V
COMP
= 4V, and allswitches in position 0 (open)
unless otherwise specified)
Parameter
Symbol
Test Conditions
IF Amplifier Gain
ν
OUT
/
ν
IF
V
AGC
= 2V, SW2, 3, 4 Position 1,
ν
IF
= 500
μ
V
rms
, Note 1
V
AGC
for 15dB Gain Reduction
SW2, 3, 4 Position 1,
ν
IF
= 2.8mV
rms
,
Adjust V
AGC
for Same
ν
OUT
as Gain
Test
V
AGC
for 45dB Gain Reduction
SW2, 3, 4 Position 1,
ν
IF
= 89mV
rms
,
Adjust V
AGC
for Same
ν
OUT
as Gain
Test
Min
25
Typ
35
Max
–
Unit
dB
4.2
4.6
5.0
V
5.1
5.5
6.1
V
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