NTE NTE783 Datasheet

NTE783

Integrated Circuit

Automatic Fine–Tuning Detector

Description:

Specifically intended for use in the automatic fine tuning (AFT) system of color television receivers,
the NTE783 AFT Detector provides all of the required circuitry except the tuning component. The
device embodies a high–gain input amplifier and automatic gain control (AGC) circuitry to provide ex­cellent sensitivity in TV AFT systems employing low level IF amplifiers.

Features:

D Cascade–Cascode Amplifier
D Internal Voltage Regulator
D Internal AGC
D ±25kHz Frequency Deviation
D 14–Pin Dual In–Line Plastic Package

Thermal Characteristics:

Operating Temperature Range, TA –40° to +85°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage Temperature Range, T

–65° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

S

Electrical Characteristics

Parameter Symbol Test Conditions Min Typ Max Unit

Static Characteristics

Total Device Dissipation P
Supply Current I
Amplifier Current I
Regulator Voltage V
AFT Output Voltage V
Output Offset Voltage V

Dynamic Characteristics

Input Admittance γ
Reverse Transfer Admittance γ
Forward Transfer Admittance γ
Output Admittance γ

: (TA = +25°C, VCC = +30V unless otherwise specified)

D

CC

3

REG

5,8

5–8

11
12
21
22

130 140 150 mW

V1 = +10.5V 4.0 6.5 9.5 mA

1.0 2.0 4.0 mA

10.9 11.8 12.8 V

5.0 6.6 8.0 V
– 0 ±1.0 V

– 0.4 + j1 – mmho
– 0 + j 3.4 – mmho
– 110 + j140 – mmho

Pin3 – 0.02 + j1 – mmho

Pin Connection Diagram

V (+) Reg

Detector A Input

IF Output

Detector B Input

1
2

3
4
5AFT Output
6N.C.
7N.C.

14 8

14

GND

13

N.C.

12

IF Input
N.C.

11
10 N.C.

9

Decouple

8 AFT Output

17

.785 (19.95) Max

.300 (7.62)

.200 (5.08)

Max

.100 (2.45)

.099 (2.5) Min

.600 (15.24)