NTE1785 datasheet(2/3 Pages) NTE | Integrated Circuit TV IF Amp w/Demod and AFC (For PNP Tuners)

2 page

Electrical Characteristics (Cont’d): (TA = +25°C, V11–13 = 12V, f = 38.9MHz unless otherwise

specified)

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Signal–to–Noise Ratio

S/N

Vi = 10mV, Note 2

–

Differential Gain

–

Differential Phase

–

deg.

Intermodulation, Blue

1.1MHz, Note 3

–

Intermodulation, Yellow

–

Intermodulation

3.3MHz, Note 4

–

Carrier Signal at Video Output

–

2nd Harmonic of Carrier at Video Output

–

White Spot Inverter Threshold Level

–

6.6

–

White Spot Insertion Level

–

4.7

–

Noise Inverter Threshold Level

–

1.8

–

Noise Insertion Level

–

3.8

–

External Video Switch (VCR) Switched Off

V14–13

–

1.1

Tuner AGC Output Current Range

–

Tuner AGC Output Voltage

V4–13

I4 = 10mA

–

0.3

Tuner AGC Output Leakage Current

V14–13 = 11V, V4–13 = 12V

–

µA

Maximum AFC Output Voltge Swing

∆V5–13

–

Detuning for AFC Output Voltage Swing

∆f

of 10V

–

100

200

kHz

AFC Zero–Signal Output Voltage

(Minumum Gain)

V5–13

AFC Switches ON

V6–13

3.2

–

AFC Switches OFF

V6–13

–

1.5

Note 2. S/N = VO black–to–white/Vn(rms) at B = 5MHz.

Note 3. 20 log (VO at 4.4MHz/VO at 1.1MHz) + 3.6dB.

Note 4. 20 log (VO at 4.4MHz/VO at 3.3MHz)

VCC

Pin Connection Diagram

AFC Output

AFC Tank (Amp)

AFC Tank (Sync)

AFC Switch Input

AGC Output

GND

AGC Delay Input

AFC Tank (Amp)

AFC Tank (Sync)

Video Output

AGC Filter

IF Input

Coupling Cap

IF Input

Coupling Cap

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