NTE NTE7112 Datasheet

NTE7112

Integrated Circuit

Color TV Video Signal/Chrominance

Signal Processing Circuit

Description:

The NTE7112 is an integrated circuit in an 18–Lead DIP type package designed for use in color TV
video signal and chrominance signal processing circuits.

Features:

D Chrominance signal processing circuitry for either PAL or SECAM system color TV receivers

can be made by using the NTE7112 in combination with the AN5622 and the AN5630N:

PAL System: NTE7112, AN5622
SECAM System: NTE7112, AN5622, AN5630N

D Incorporating luminance signal mixer circuit, provides R, G, B original color output
D DC Transmission Quality: 100%
D All DC controlled adjustment simplifies wiring operation (Color/Contrast/Brightness adjustment)

Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)

17–10

+6V to –4V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

14.4V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

to 0V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

800mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Supply Voltage, V
Circuit Voltage, V
Circuit Voltage, V
Circuit Current, I
Circuit Current, I
Power Dissipation (T

CC

, V

4–10

, V

5–10

, I

7,I8

9

, I13, I

11

= +70°C), P

A

16–10, V18–10
6–10

14

D

Operating Ambient Temperature Range, T
Storage Temperature Range, T

stg

opr

V

+7mA to –15mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

+3mA to –3mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–20° to +70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–55° to +155°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical Characteristics:

Parameter Symbol Test Conditions Min Typ Max Unit

Total Circuit Current I
Voltage Gain (Max Video) A

Contrast Attenuation Ratio (Min) A
Frequency Characteristics (Video) f

(TA = +25°C unless otherwise specified)

Vmax/AVmin

tot

VCC = 12V 27 37 47 mA

V

c

Sine wave 10kHz, 100mV
Contrast max.,
Picture min.

Sine wave 100mV
cy when output/input is –3dB, Pic­ture min. (10kHz level assumed as
0dB)

input frequen-

rms

rms

input,

3.1 4.0 4.9 times

0.15 0.19 0.26 times
6 – – MHz

Electrical Characteristics (Cont’d): (TA = +25°C unless otherwise specified)

Parameter Symbol Test Conditions Min Typ Max Unit

DC Transfer Quantity T

DC

Video input 1V

(stair step),

P–P

APL 10 to 90, B output

Color Difference Voltage Amplification

B – Y

R – Y A

A

V (B – Y)

V (R – Y)

Sine wave 10kHz, 240mV
output voltage gain for Pin12 input

Cosine wave 10kHz, 200mV

P–P

, Pin9

P–P

Pin7 for Pin15 input

G – Y Color Difference Ratio G – Y/B – Y Sine wave 10kHz, 240V

P–P

, Pin12
input cosine wave 10kHz,
200mV

, Pin8 output ratio to Pin9

P–P

output for Pin15 input

Demodulation Color (G – Y) ∠(G – Y) In G – Y/B – Y, phase difference

between Pin8 output and Pin9 out­put

Color Difference Output Voltage (max.) e

o

Sine/Cosine wave 10kHz, Pin7 or
Pin9 output voltage at input 1.5V

P–P

Differential Gain (Video Amp) DG Superimpose 3.58MHz compo-

nents at 10mV
of stair step 1V

on the video part

P–P

for measurement

P–P

with a vector scope

Demodulation DC Output Voltage E

E

Change w/Supply Voltage ∆E

O(DC)

E

Change w/Ambient Temperature ∆E

O(DC)

DC Voltage Difference between

Demodulation Outputs

O(DC)

O(DC)/VCCVCC

O(DC)/TAV7

∆E

X–Y

V4 = 8V, VR–4 for input invalid
Signal: VR

RGB outputs

–5

= 12V ±20%, V7 = 2V

= 12V) RGB outputs

(V

CC

= 2V (TA = +25°C)
= –20° to +70°C, RGB outputs

T

A

V7 = 2V, Output differential voltage
for each of R.G.B

90 96 100 %

5.1 6.6 7.9 times

5.1 6.6 7.9 times

0.28 0.34 0.40 times

234 236 239 deg.

5.5 6.5 7.6 V

P–P

– – 6 %

1.3 1.9 2.4 V

0.16 0.24 0.32 V/V

–4 –2 +0.5 mV/°C

– 0 ±300 mV

∆E

Change w/Supply Voltage ∆E

X–Y

∆E

Change w/Ambient Temperature ∆E

X–Y

Pedestal Clamp Voltage V

Blanking Voltage V

X–Y/VCCVCC

X–Y/TA

(clamp)

(V

CC

V7 = 2V (TA = +25°C)
T

A

Pulse voltage for pedestal clamp
operation

(BLK)

Pulse voltage for blanking operation 0.65 0.85 1.05 V

= 12V ±20%, V7 = 2V

= 12V) for VCC = 12V

= –20° to +70°C, for TA = +2 5°C

– 0 ±100 mV

– 0 ±100 mV

0.65 0.85 1.05 V