NTE749
Integrated Circuit
TV Video IF Amp
Features:
D
High Power Gain: 46dB (Typ) f = 58MHz
D
Wide AGC Range: 60dB (Min)
D
Low Reverse Transfer Admittance: y
r
1.0
(Typ)
D
Nearly Constant Input and Output Admittance over AGC Range
D
Control Signal Available for Delayed Forward AGC of Tuner
D
Control Signal Available for Delayed of FET Tuner
D
Either Positive or Negative Going Video Signals
Absolute Maximum Ratings:
Supply Voltage, V
CC
18V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Voltage, V
7
, V
8
18V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Voltage, V
1
, V
2
10V
pp
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AGC Input Voltage, V
6
, V
10
6V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gate Input Voltage, V
5
10, 20V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation, P
D
625mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Derated Above T
A
= 25
C
5.0mW/
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Min. Load Resistance, R
L
4k
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, T
opr
20
to +75
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
55
to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics: (V
CC
= 12V, T
A
= +25
C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Supply Current
I
CC
27
31
mA
Output Current
I
OUT
5.7
mA
Power Dissipation
P
D
324
372
mW
Power Gain
G
p
f = 58MHz
42
46
dB
Noise Figure
N
F
f = 58MHz,R
g
= 50
8.5
dB
Maximum Output Voltage
V
OM
0dB AGC
350
mV
rms
30dB AGC
200
Electrical Characteristics (Cont'd): (V
CC
= 12V, T
A
= +25
C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
AGC AGC Range
AGC
60
dB
R
F
AGC
V
12
(Max)
8.2
V
V
12
(Min)
0.2
Power Gain Variations
G
P
R
F
AGC At Operating Range
10
dB
Input Admittance
g
i
f = 58MHz
0.8
m
Input Acceptance
b
i
3.4
Output Admittance
g
o
f = 58MHz
155
Output Acceptance
b
o
850
Forward Transfer Admittance
y
f
f = 58MHz 0dB AGC
220
m
135
deg
Phase Angle of Forward Transfer
Admittance
<
y
f
30dB AGC
95
deg
Reverse Transfer Admittance
y
r
f = 58MHz
<
1.0
V
CC
Pin Connection Diagram
IF Input
RF AGC Delay Voltage
1
2
3
4
Bypass
GND
GND
5
Keyer Pulse
6
Video & Ref DC Inputs
7
IF Output
14
13
12
11
IF AGC Filter
RF AGC Output
10
Video & Ref DC Inputs
9
AGC Storage Capacitor
8
IF Output
.600 (15.24)
1
7
14
8
.300
(7.62)
.200 (5.08)
Max
.100 (2.45)
.099 (2.5) Min
.785 (19.95)
Max
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