STV8223B 查看數據表（PDF） - STMicroelectronics
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STV8223B Datasheet PDF : 10 Pages
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STV8223B
ELECTRICAL CHARACTERISTICS (continued)
(Tamb = 25°C, VCC = 9V, IF input = 10mVRMS sync level at B/G,
Video modulation DSB, D = 90% at B/G, 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
FM SOUND DEMODULATION
V8S
R8
AMR
SVR
V15
THD
R15
S/N
Input Sensitivity
Limiter Input Resistance
DC Voltage (Pin 8)
Amplitude Modulation Rejection
Supply Voltage Rejection Ratio
Detected Audio Output Signal
Total Harmonic Distortion
Internal Deemphasis Resistor
Signal to Noise Ratio
Black Picture (sync only)
White Picture
250kHz Square Wave
Test Conditions
Min. Typ. Max. Unit
150
µVRMS
600
Ω
4.2
V
Note 4
50 61
dB
Ripple signal : 100Hz, 0.5VPP
28 33
dB
0.85 1.1 1.4 VRMS
0.2 1
%
600 750 900 Ω
See Note 5,
55 60
dB
Weighted CCIR 468-4,
(quasi peak level) input Pin 8
Measurement between IF input 47 52
dB
(Pins 19-20) and audio output (Pin 15)
SAW : K2955
46
50
dB
BPF : SFE5.5MB
47 52
dB
VOLUME CONTROL
VC Range Control Range
See Figure 22
72
AUDIO SWITCH
R16
Input Resistance
55
CRtk Crosstalk
70
En
Output Noise Level (Pin 14)
Weighted CCIR 468-4, V13 = 0.5V
(quasi peak level)
EXTHD THD on External Signal (Pin 14)
VIN = 2VRMS, Attenuation = 0dB
Audio Reference Voltage (Pin 9)
VIDEO SWITCH
VDC 12 DC Input Level
No signal
1.6
VS12
Top Sync. Clamp Level
V1 1
DC Output Level
No signal
1.7
VS11
Top Sync. Clamp Level
Crosstalk
GEX Gain from Ext. Input to Output
5.5
Output Swing
4
I1 2
Input Current
V12 = VDC12 = 1.5V
VBW Bandwidth
VIN = 1VPP
GIN
Gain from Int. Input to Output
-0.5
MUTE (Pin 13)
VTH13 Threshold Voltage Pin 13
0.2
CONTROL INPUT
Negative Modulation
Negative Modulation
Video : External - Audio : External
7.2
Video : Internal - Audio : Internal
Notes :
4.
AMR
=
20
log
V15 (mVRMS)
VAM
(dB)
where
VAM
=
output amplitude
in
AM
for
fM
=
1kHz
and
m
=
30%
5.
S
N
=
20
log
V15 (mVRMS)
VN (mVRMS)
(dB)
77
70 85
80
70
0.1 0.3
4.5
1.9 2.2
1.8
2 2.3
1.5
55
6 6.5
5
15
15
0 +0.5
0.3 0.4
1.8
dB
kΩ
dB
µV
%
V
V
V
V
V
dB
dB
V
µA
MHz
dB
V
V
V
4/10
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