STV8224A View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'STV8224A' PDF : 12 Pages View PDF
STV8224A
ELECTRICAL CHARACTERISTICS (continued)
(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
AGC CIRCUIT (L MODE)
Test Conditions
Min. Typ. Max. Unit
I22CL
I22DL
I22CL+
Charging Current
Discharge Current
Additional Charging Current
I22DL+
Threshold Voltage Level for
Additional Charging Current
Additional Discharging Current
Threshold Voltage Level for
Additional Discharging Current
TUNER AGC
I23
Maximum Sinked Current
S23
Current Slope
I23+
Maximum Tuner Plus Sinked Current
FM SOUND DEMODULATION
V8S
R8
AMR
Input Sensitivity
Limiter Input Resistance
Amplitude Modulation Rejection
SVR
V15
THD
Supply Voltage Rejection Ratio
Detected Audio Output Signal
Total Harmonic Distortion
R15
Internal Deemphasis Resistor
S/N
Signal to Noise Ratio
Note 3
L in case of missing, VITS Pulses
and no White in Video Content
Refered to Pin 3
Refered to Pin 3
R24 = 5kΩ
Note 6
-3dB FM detected signal
Note 4
Ripple signal : 100Hz, 0.5VPP
Note 5, Weighted CCIR 468-4
2 3.3 4.5 mA
0.3
µA
5
µA
2.75
V
28 40 56 µA
2.25
V
1.5 2 2.5 mA
100 170 230 µA/dB
40
mA
35
1.2
50 61
12 17
0.85 1.1 1.4
0.2 1
600 750 900
50 55
µV
kΩ
dB
dB
VRMS
%
Ω
dB
VOLUME CONTROL
VC Range Control Range
See Figure 22
72 77
dB
AUDIO SWITCH
R16
CRtk
EXTHD
Input Resistance
Crosstalk
THD on External Signal
VIN = 2VRMS, Attenuation = 0dB
45 60 75 kΩ
70 80
dB
0.1 0.3 %
Notes : 3. Triggered on white level
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)
6. Additional sinked current for large increasing steps of input signal when :
- Voltage Pin 22 > starting point defined Pin 24.
- Output signal (Pin 3) saturated (V3 < V BTH in BG mode, V3 > V WTH in L mode).
4/12
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