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PDF NTE7047 Data sheet ( Hoja de datos )
| Número de pieza | NTE7047 | |
| Descripción | Integrated Circuit TV Color Small Signal Sub System | |
| Fabricantes | NTE Electronics | |
| Logotipo |  |
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NTE7047
Integrated Circuit
TV Color Small Signal Sub System
Features:
D Vision IF Amplifier with Synchronous Demodulator
D Automatic Gain Control (AGC) Detector Suitable for Negative Modulation
D AGC Tuner
D Automatic Frequency Control (AFC) Circuit with Sample–and–Hold
D Video Preamplifier
D Sound IF Amplifier and Demodulator
D DC Volume Control or Separate Supply for Starting the Horizontal Oscillator
D Audio Preamplifier
D Horizontal Synchronization Circuit with Two Control Loops
D Vertical Synchronization (Divider System) and Sawtooth Generation with Automatic Amplitude
Adjustment for 50Hz and 60Hz
D Transmitter Identification (Mute)
D Generation of Sandcastle Pulse
Absolute Maximum Ratings:
Supply Voltage (Pin7), VP = V7–6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.2V
Total Power Dissipation, Ptot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3W
Operating Ambient Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –25° to +65°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –25° to +150°C
Electrical Characteristics: (TA = +25°C, VP = V7–6 = 12V, carrier 38.9MHz, negative modulation
unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Supplies
Supply Voltage Range (Pin7)
Supply Current (Pin7)
Start Current (Pin11)
Start Voltage Horizontal Oscillator
Start Protection Level
V7–6
I7
I11
V11
V11
At no input
Note 1
I11 = 12mA
9.5 12.0 13.2 V
75 125 165 mA
– 6.5 9.0 mA
9.5 – – V
– – 16.5 V
Note 1. Pin11 has a double function. When during switch–on a current of 9mA is supplied to this pin,
it is used to start the horizontal oscillator. The main supply can then be obtained from the
horizontal deflection stage. When no current is supplied to this pin it can be used as a volume
control.
1 page  
Electrical Characteristics (Cont’d): (TA = +25°C, VP = V7–6 = 12V, carrier 38.9MHz, negative
modulation unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Horizontal Synchronization Circuit (Cont’d) (Flyback Input and Sandcastle Output, Note 22)
Vertical Blanking Pulse
50Hz divider in search window – 21 – lines
60Hz divider in search window – 17 – lines
50Hz divider in narrow window – 25 – lines
60Hz divider in narrow window – 21 – lines
Delay Between Start of Sync Pulse at
the Video Output and the Burst Key
Pulse
Trailing edge, 60Hz
Rising edge
– – 9.3 µs
4.7 5.4 6.1 µs
Horizontal Synchronization Circuit (Coincidence Detector)
Voltage for Synchronized Condition
Voltage for No Signal Condition
Switching Level to Switch the Phase
Detector from Fast to Slow
V22
V22
V22
– 9.8 –
– 1.5 –
6.2 6.7 7.2
V
V
V
Hysteresis Slow to Fast
Switching Level to Activate the Mute
Function (Transmitter Identification)
V22
V22
– 0.6 –
2.5 2.8 3.1
V
V
Hysteresis Mute Function
Delay Time of Mute Release after
Transmitter Insertion
V22
–2–V
– – 300 µs
Allowable Load on Pin22
– – 10 µA
External Video Mode
V22
Current at Pin22
I22 V22 = 0V
Vertical Circuit (Vertical Ramp Generator, Note 24)
– – 0.7 V
– – 0.8 mA
Input Current During Scan
Discharge Current During Retrace
Sawtooth Amplitude (peak–to–peak value)
Interlace Timing of the Internal Pulses
I2
I2
V2(p–p)
– – 2 µA
– 0.8 – mA
– 1.9 –
V
30 32 34 µs
Vertical Circuit (Vertical Output, Note 24)
Available Output Current
I3 V3 = 4V
Maximum Output Voltage
V3 I3 = 0.1mA
Vertical Circuit (Vertical Feedback Input, Note 24)
– – 3 mA
4.4 5.0 –
V
Input Voltage, DC Component
Input Voltage, AC Component
(peak–to–peak value)
V4
V4(p–p)
2.9 3.3 3.7
–1–
V
V
Input Current
Internal Precorrection to Sawtooth
Deviation Amplitude
I4
∆tp
50Hz/60Hz
– – 12 µA
– 3 –%
– – 2%
Temperature Dependence of the
Amplitude
TA = +20°C to +65°C
– – 2%
Vertical Circuit (Vertical Guard, Note 24, Note 25)
Active Switching Level at a Deviation
with Respect to the DC Feedback
Level: Guard Level LOW
∆V4 V27 = 2.5V
– 2.1 –
V
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet NTE7047.PDF ] | |
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