NTE1469
Integrated Circuit
Video IF & AFT
Functions:
D
PIF Amplifier
D
Video Detector
D
AFS with Defeat
D
Noise Canceller
D
Forward AGC
Features:
D
SAW Filter Connectable Without Preamp
D
Input Sensitivity: V
in
= 50μV
rms
Typ.
D
Output Peak−to−Peak Voltage at Video Detector Adjustable Externally.
D
High S/N under Weak−Input Signal
Absolute Maximum Ratings:
(T
A
= +25°C unless otherwise specified)
Supply Voltage, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V
Input Voltage, V
in
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V
p−p
Power Dissipation (T
A
= +75°C), P
T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 625mW
Operating Temperature, T
opr
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
−20°
to +75°C
Storage Temperature, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
−40°
to +125°C
Electrical Characteristics:
(V
CC
−12V,
T
A
= 25°C, unless otherwise specified)
Item
Supply Current
Input Sensitivity
AFC Output Voltage at No
Signal Input
Signal−to−noise Ratio
Max. Input Voltage
Output Carrier−Zero DC Voltage
Sync Tip Voltage
Differential Voltage between
Pin 14 and Pin 13
Max, Video Output Voltage
Symbol
I
CC
V
in
V
16
S/N
Test Conditions
No signal input
V
out
= 1.35V
P−P
(Pin 24)
V
C(AFC)
= 0, V
15
= 1V
V
in(AFC)
= 0, V
15
= 0
V
in
= 3mV
rms
(no demodulation)
S/N = 20log V
out
/V
n
(Pin 2)
V
in
= 0, V
22
= 1.8V
V
iin
= 3mV
rms
, m = 75%
Pin 2
Pin 24
Pin 21
Pin 9
Min
21.0
22.0
25
5.4
−
−
−
4.5
3.9
7.35
−10
Typ
27.0
25.5
50
6.5
4.5
53
12
5.8
4.1
7.7
0
Max
34.5
28.4
100
7.7
−
−
−
7.0
4.3
8.05
+10
Unit
mA
μV
rms
V
V
mV
rms
V
V
V
in
max V
13−14
= 80mV
rms
, DG = 1dB
V
W
V
p
V
14,13
Input Voltage: 80μV
rms
∼
16mV
rms
C.W.
DC Voltage between Pin 14 and Pin 13
Measure V
14,13
Voltage between Pin 14 and Pin 13:
300mV
rms
C.W. V
22
= 1.8V,
Measure DC Voltage at Pin 2
V
in
: modulation of video
sweep. 3mV
rms
3 V
Standardizing the output
voltage at 100kH
Z
Pin 2
V
CC
= 12V, R
3
= 180Ω,
DC voltage at Pin 9
C
g
connecting V
CC
through
180Ω
2MH
Z
4MH
Z
6MH
Z
V
in
= 0
V
in
= 3mV
rms
mV
V
2M
−
−
−
−
6.4
5.8
−
0
0
+1.5
7.4
6.4
2.5
−
−
−
7.9
7.0
V
Video Frequency Response
f
B
dB
Supply Voltage for IF Block
V
9
V
Small Signal Video Amp. Gain
Video Amp. DC Transfer Ratio
Video Amp. Bandwidth
Noise Canceller Threshold
Voltage
Noise Canceller Clamp Voltage
AFC Detector Sensitivity
A
AC
A
DC
B
v
Input Signal at Pin 3: 10kH
Z
,
0.1V
P−P
plus 4.5V bias,
Measure AC gain to Pin 24
Input Voltage at Pin 3: 4V
DC Voltage at Pin 24
Input Signal at Pin 3: 0
∼
20MH
Z
Sweep: 0.1V
P−P
+ 4.5V, Frequency
when voltage at Pin 24 goes down 3dB
Input Signal Waveform 1 is applied to
Pin 3. V
NS
means V
N
at Pin 3 when the
pulse peak at Pin 24 begins to rise up
Input Signal Waveform 1 is applied to
Pin 3. V
NC
at Output Signal Waveforn 1
of Pin 24 when V
N
= 1V
f
o
= 58.75MH
Z
, V
in(AFC)
= 14mV
rms
,
V
CC
= 12V,
ΔV
= 10V (1
∼
11V)
−1.5
7.25
8
−0.7
7.6
−
0
7.95
−
dB
V
MH
Z
V
NS1
0.3
0.5
0.7
V
V
NC
μ
AFC
0.45
−
0.7
−
0.95
200
V
kH
Z
10V
Electrical Characteristics (Cont’d):
(V
CC
−12V,
T
A
= +25°C, unless otherwise specified)
Item
Symbol
Test Conditions
f
o
+ 2.0MH
Z
f
o
+ 1.5MH
Z
C Output Voltage
AFC O
for Deviation of Input Frequency
V
CC
= 12V,
12V
f
o
= 58.75MH
Z
,
V
in(AFC)
= 5mV
rms
f
o
+ 0.7MH
Z
f
o
±
0MH
Z
f
o
−
0.7MH
Z
f
o
−
1.5MH
Z
f
o
−
2.0MH
Z
Noise Figure
IF Input Impedance
F
I
Z
iin
Voltage at Pin 12 is fixed, V
in
= 3mV
rms
Either Pin 6 or Pin 7 is
grounded, Pin 12: 8.0V
C
in
R
in
Min
2.0
1.0
−
−
11.0
−
−
−
30
70
Typ
−
−
−
6.0
−
−
−
6.0
40
100
Max
−
−
1.0
−
−
11.0
10.0
−
50
140
dB
pF
Ω
V
Unit
V
AFC
Pin Connection Diagram
Bypass
Sound/Video Output
Noise Cancel Input
Video Detector Adjust
Bypass
IF Input
IF Input
Bypass
V
CC
(2)
1
2
3
4
5
6
7
8
9
24
23
22
21
20
19
18
17
16
15
14
13
Video Output
AGC Filter
Filter
V
CC
(1)
AFC Adjust
Sync Detector Adjust
Sync Detector Adjust
AFC Adjust
AFC Output
V
CC
(3)
Sound Trap
Sound Trap
RF AGC Output
10
GND
11
AGC Delay Adjust
12
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