NTE1785 查看數據表（PDF） - NTE Electronics

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NTE1785

Integrated Circuit TV IF Amp w/Demod and AFC (For PNP Tuners)

NTE Electronics 

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

Differential Gain

S/N Vi = 10mV, Note 2

dG

–

58

– dB

–

4

10 %

Differential Phase

–

2

10 deg.

Intermodulation, Blue

1.1MHz, Note 3

–

46 60 dB

Intermodulation, Yellow

–

46 50 dB

Intermodulation

3.3MHz, Note 4

–

46 54 dB

Carrier Signal at Video Output

2nd Harmonic of Carrier at Video Output

–

4

30 mV

–

20 30 mV

White Spot Inverter Threshold Level

–

6.6

–

V

White Spot Insertion Level

–

4.7

–

V

Noise Inverter Threshold Level

–

1.8

–

V

Noise Insertion Level

–

3.8

–

V

External Video Switch (VCR) Switched Off

Tuner AGC Output Current Range

Tuner AGC Output Voltage

Tuner AGC Output Leakage Current

Maximum AFC Output Voltge Swing

Detuning for AFC Output Voltage Swing

V14–13

–

I4

0

V4–13 I4 = 10mA

–

I4

V14–13 = 11V, V4–13 = 12V –

∆V5–13

10

∆f

of 10V

–

–

1.1 V

–

10 mA

–

0.3 V

–

15 µA

11

–

V

100 200 kHz

AFC Zero–Signal Output Voltage

(Minumum Gain)

V5–13

4

6

8

V

AFC Switches ON

AFC Switches OFF

V6–13

V6–13

3.2

–

–

V

–

–

1.5 V

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)

Pin Connection Diagram

IF Input 1

Coupling Cap 2

AGC Delay Input 3

AGC Output 4

AFC Output 5

AFC Switch Input 6

AFC Tank (Sync) 7

AFC Tank (Amp) 8

16 IF Input

15 Coupling Cap

14 AGC Filter

13 GND

12 Video Output

11 VCC

10 AFC Tank (Sync)

9 AFC Tank (Amp)

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