STV8224B Просмотр технического описания (PDF) - STMicroelectronics
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STV8224B Datasheet PDF : 12 Pages
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STV8224B
ELECTRICAL CHARACTERISTICS
(Tamb = 25°C, VCC = 9V, IF input = 10mVRMS sync level at B/G, Peak-white level at L,
Video modulation DSB, D = 90% at B/G, D = 95% at L, fPC = 38.9MHz, fSC = 33.4MHz,
Video BW = 5MHz, Sound carrier input : 5.5MHz, 10mVRMS, fM = 1kHz, Audio BW = 20kHz, ∆f = ±50kHz,
Volume attenuation= 0dB, unless otherwise specified)
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
SUPPLY
VCC Supply Voltage
ICC Supply Current
IF AMPLIFIER
V1 9-20
R19-20
C19-20
Gr
Input Sensitivity (RMS)
Differential Input Resistance
Differential Input Capacitance
Gain Control Range
Max Input Signal
SYNCHRONOUS VIDEO DEMODULATOR
I17, VCC = 9V
-3dB Video at Output
+1dB Video at Output
8
9 12.6 V
70
95
mA
70
µVRMS
2
kΩ
2
pF
68
dB
180
mVRMS
DFPC Vision Carrier Capture
AFC
S2 AFC Slope
DEMODULATED VIDEO OUTPUT (Pin 3)
VA3
BG vs L
VS3
Amplitude
Amplitude Difference
Top Sync Level
Zero Carrier Level
BW Bandwidth
Dg Differential Gain
Dp Differential Phase
Vr3c Residual Carrier Signal (RMS Value)
Vr3h Residual 2nd Harmonic (RMS Value)
I3
Internal Bias of Emitter Follower
S/N Signal to Noise Ratio
Intermodulation 1.07MHz
VWTH White Noise Threshold Voltage
VWIL
VBTH
VBIL
White Noise Insertion Level
Black Noise Threshold Voltage
Black Noise Insertion Level
AGC CIRCUIT (BG MODE)
See Figure 21
Top Sync to White
B/G and L
B/G
L
-3dB Video Signal
Note 1 - Weighted CCIR-567
Note 2
-1.4
1.6 MHz
0.2
µA/kHz
2
2.3 2.6 VPP
10
%
1.6 1.9 2.2
V
4.4
V
1.8
V
7
9
MHz
6
8
%
3
6 Degree
1
10 mV
1
10 mV
3
5
mA
56 61
dB
52
dB
4.85
V
3.6
V
1.3
V
2.5
V
I22CBG
I22DBG
C/D
Charging Current
Discharge Current
Charging/Discharging Ratio
550 950 1300 µA
12
20
28
µA
45
Notes : 1.
S
N
=
20
log
10
Vout black white
VN (mVRMS)
at BW = 5MHz
2. Video carrier relative level = 0dB, Chroma subcarrier level = -3.2dB, Sound carrier relative level = -20dB. AGC voltage (Pin 22)
is adjusted to get 1VPP signal on output (Pin 3).
3/12
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