NTE1890 Datasheet, PDF (2/6 Pages) NTE Electronics – Integrated Circuit NTSC Decoder for TV

Electrical Characteristics (Cont’d): (V_P = V_1–23 = 12V, T_A = +25°C unless otherwise specified)
Parameter
Symbol
Min Typ Max Unit
Chrominance Amplifier (Pin3)
Input Voltage (Peak–to–Peak Value, Note 2)
Input Impedance
Input Capacitance
ACC Control Range
V_{3–23(p–p)}
|Z_3–23|
C_3–23
55 550 1100 mV
–
8
– kΩ
–
4
6 pF
30 –
– dB
Change of the Burst Signal at the Output over the Whole Control Range
–
–
1 dB
Gain at Nominal Contrast/Saturation Pin3 to Pin24 (Note 3)
13 –
– dB
Output Voltge (Peak–to–Peak Value at Burst Signal of 300mV_(p–p),
(Note 3)
V_{24–23(p–p)}
– 240 – mV
Maximum Output Voltage Range (Pin24, Peak–to–Peak Value)
Distortion of Chrominance Amplifier at V_{24–23(p–p)} = 0.5V (Output)
up to V_{3–23(p–p)} = 1V (Input)
Frequency Response Between 0 and 5MHz
Saturation Control Range
V_{24–24(p–p)}
d
α_24–3
– 1.7 –
V
– 3.0 5.0 %
–
– –2 dB
50 –
– dB
Input Current Saturation Control (Pin6)
Tracking Between Luminance and Chrominance Contrast Control
I₆
–
– 20 µA
–
–
2 dB
Cross–Coupling Between Luminance and Chrominance Amplifier
(Note 4)
–
– –46 dB
Signal–to–Noise Ratio at Nominal Input Signal (Note 5)
S/N
56 –
– dB
Phase Shift Between Burst and Chrominance at Nominal
Contrast/Saturation
–
– ±5 deg
Output Impedance of Chrominance Amplifier
Output Current
Reference Part (Phase–Locked Loop)
|Z_24–23|
I₂₄
– 25 –
Ω
–
– 10 mA
Catching Range (Note 6)
∆f
500 700 – Hz
Phase Shift for ±400Hz Deviation for f_OSC (Note 6)
Reference Part (Oscillator)
–
–
5 deg
Temperature Coefficient of Oscillator Frequency (Note 6)
Frequency Variation when Supply Voltage Increases from
10V to 13.2V (Note 6)
TC_OSC
∆f_OSC
– –1.5 – Hz/K
– 40 – Hz
Input Resistance (Pin22)
Input Capacitance (Pin22)
R_22–23
C_22–23
– 300 –
Ω
–
– 10 pF
Note 2. Indicated is a signal for a color bar with 75% saturation; chrominance to burst ratio is 2.2:1.
Note 3. Nominal contrast is specified as the maximum contrast –3dB and nominal saturation as the
maximum saturation –6dB.
Note 4. Cross coupling is measured under the following conditions:
S Input signals nominal.
S Contrast and aturation such that the nominal output signals are obtained.
S The signals at the output at which no signal should be available must be compared
with the nominal output signal at that output.
Note 5. The signal–to–noise ratio is defined as peak–to–peak signal with respect to RMS noise.
Note 6. All frequency variations are referred to 3.58MHz carrier frequency.