NTE1775
Integrated Circuit
PIF Subsytem for TV Receiver
Description:
The NTE1775 is a picture IF subsystem that provides 3–stage IF amplifier, Video Detector, black and
white noise inverting circuits and AFT detector for a TV receiver.
The NTE1775 also provides internal fast response AGC with dual time constants for the IF amplifier
stages and delayed AGC for an external RF amplifier stage. It is designed for FET top front–end
(reverse AGC).
Features:
D
High Input Sensitivity 3–Stage IF Amplifier: 58.75MHz 100µV
RMS
Type
D
Gain Reduction with Excellent Stability: Reduction Range 65dB Typ
D
Video Detector with Linear Characteristics
D
Black and White Noise Inverting Circuits
D
Balanced AFT Output
D
Improved Fast AGC Response
D
Delayed AGC Output for a Front–End FET Top Front–End
D
Minimal External Components and Adjustments Required
Absolute Maximum Ratings:
(T
A
= +25°C unless otherwise specified)
Supply Voltage (Pin11), V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V
Open Loop Voltage (Pin14), V
14
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V
Video DC Output Current (Pin12), I
12
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6mA
Power Dissipation , P
D
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4W
Derated Above 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.2mW/°C
Operating Temperature Range, T
opr
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +65°C
Storage Temperature Range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +150°C
Electrical Characteristics:
(T
A
= +25°C unless otherwise specified)
Parameter
Recommended Supply Voltage
Supply Current
Video DC Output Voltage
AFT DC Output Voltage
Symbol
V
CC
I
CC
V
12
V
5
V
6
AFC Output Offset Voltage
RF AGC Residual Output Voltage
RF AGC Leakage Current
Video Sensitivity
AGC Range
Sync Tip Level Voltage
Maximum Input Voltage
White Noise, Threshold Level
White Noise, Clamp Level
Black Noise, Threshold Level
Black Noise, Clamp Level
Video Frequency Response
Carrier Suppression
2
nd
Carrier Suppression
920kHz Carrier Beat Suppression
Differential Phase
Differential Gain
Input Impedance
∆A
(IF)
V
SYNC
V
W TH
V
W CL
V
B TH
V
B CL
f
BW
CL
I
2nd
I
920
DP
DG
R
IN
C
IN
AFT Sensitivity
AFT Output Upper Voltage
AFT Output Lower Voltage
Maximum Available Current
f = 58.75MHz
V
5
, V
6
U f = 58.75MHz
V
5
, V
6
L f – 58.75MHz
I
4
Max
f = 58.75MHz Between Pin1 and Pin16
V
5
–V
6
V
4
SAT
V
CC
= 12V
V
CC
= 12V
V
CC
= 12V, SW
1
: ON, SW
2
: ON
V
CC
= 12V, SW
1
: ON, SW
2
: ON
V
CC
= 12V, SW
1
: ON, SW
2
: ON
V
CC
= 12V, SW
3
: 2, SW
4
: 1
V
CC
= 12V, V
12
= 0.8V
P–P
,
f
p
= 58.75MHz, AM: 30%
V
CC
= 12V, f
p
= 58.75MHz,
V
14
= 11.5V to 4.0V
V
CC
= 12V, f
p
= 58.75MHz
V
CC
= 12V, f
p
= 58.75MHz
V
CC
= 12V, f
p
= 58.75MHz
V
CC
= 12V, f
p
= 58.75MHz
V
CC
= 12V, f
p
= 58.75MHz
f = 58.75MHz, Sweep Generator
SG
1
= 100mV
rms
, SG
2
, SG
3
: OFF
SG
1
= 100mV
rms
, SG
2
, SG
3
: OFF
SG
1
= 100mV
rms
, SG
2
= 32mV
rms
,
SG
3
= 32mV
rms
Test Conditions
Min
10.8
42
5.2
5.3
5.3
–1.5
–
–
50
60
2.3
100
6.0
3.7
1.4
2.9
4.5
40
40
33
–
–
3.0
–
–
11.7
1.8
0.3
Typ
12.0
51
5.5
6.8
6.8
0
–
–
100
65
2.5
120
6.4
4.1
1.6
3.3
5.5
50
50
38
3.5
7
4.5
2.0
16
11.9
2.3
–
Max
13.2
63
5.8
8.3
8.3
+1.5
0.5
1.0
220
–
2.7
–
6.8
4.5
1.8
3.7
–
–
–
–
5.0
10
6.0
5.0
–
12.0
2.8
–
Unit
V
mA
V
V
V
V
V
µA
µV
rms
dB
V
mV
rms
V
V
V
V
MHz
dB
dB
dB
deg
%
kΩ
pF
kHz/V
V
V
mA
I
4
LEAK V
CC
= 12V, SW
3
: 1, SW
4
: 1
V
IN
Max V
CC
= 12V, f
p
= 58.75MHz
Microcontroller MCU
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