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參數(shù)資料
| 型號： | STV8224B |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Multistandard Video and Sound IF System with Audio and Video Switches(低音頻和視頻開關(guān)的多標(biāo)準(zhǔn)視頻和聲音IF系統(tǒng)) |
| 中文描述： | 多標(biāo)準(zhǔn)視頻和聲音中頻與音頻視頻開關(guān)系統(tǒng)（低音頻和視頻開關(guān)的多標(biāo)準(zhǔn)視頻和聲音中頻系統(tǒng)） |
| 文件頁數(shù)： | 4/12頁 |
| 文件大小： | 133K |
| 代理商： | STV8224B |
ELECTRICAL CHARACTERISTICS
(continued)
(T
amb
= 25
°
C,V
CC
= 9V,IF input= 10mV
RMS
synclevel at B/G,Peak-whitelevel at L,
VideomodulationDSB, D = 90% at B/G,D = 95%at L, f
PC
= 38.9MHz,f
SC
= 33.4MHz,
VideoBW = 5MHz, Soundcarrier input: 5.5MHz,10mV
RMS
, f
M
= 1kHz,AudioBW= 20kHz,
f =
±
50kHz,
Volumeattenuation= 0dB,unlessotherwisespecified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
AGC CIRCUIT (L MODE)
I
22CL
I
22DL
I
22CL
+
Charging Current
Discharge Current
Additional Charging Current
Note 3
2
3.3
0.3
5
4.5
mA
μ
A
μ
A
L in case of missing, VITS Pulses
and no White in Video Content
Refered to Pin 3
Threshold Voltage Level for
Additional Charging Current
Additional Discharging Current
Threshold Voltage Level for
Additional Discharging Current
2.75
V
I
22DL
+
28
40
2.25
56
μ
A
V
Refered to Pin 3
TUNER AGC
I
23
S23
I
23+
Maximum Sinked Current
Current Slope
Maximum Tuner Plus Sinked
Current
1.5
100
2
2.5
230
mA
μ
A/dB
mA
R
24
= 5k
Note 4
170
40
FM SOUND DEMODULATION
V
8S
R
8
Input Sensitivity
Limiter Input Resistance
DC Voltage (Pin8)
Amplitude Modulation Rejection
Supply Voltage Rejection Ratio
Detected Audio Output Signal
Total Harmonic Distortion
Internal Deemphasis Resistor
Signal to Noise Ratio
150
600
4.2
61
33
1.1
0.2
750
60
μ
V
RMS
V
dB
dB
V
RMS
%
dB
AMR
SVR
V
15
THD
R
15
S/N
Note 5
Ripple signal : 100Hz, 0.5V
PP
50
28
0.85
1.4
1
900
600
55
See Note 6,
WeightedCCIR 468-4,
(quasi peak level) inputPin 8
Measurement between IF input
(Pins19-20) and audiooutput(Pin15)
SAW : K2955
BPF : SFE5.5MB
Black Picture (sync only)
White Picture
250kHz Square Wave
47
46
47
52
50
52
dB
dB
dB
VOLUME CONTROL
V
C
Range
Control Range
See Figure 22
72
77
dB
Notes :
3. Triggeredon whitelevel
4. Additional sinked currentfor large increasing steps of input signal when:
- VoltagePin 22 > startingpoint defined Pin 24.
- Outputsignal (Pin 3) saturated(V
3
< V BTH inBG mode, V
3
> V WTH in L mode).
5. AMR = 20 logV
15
(
mV
RMS
)
V
AM
6.S
V
N
(
mV
RMS
)
(dB)
(dB) where V
AM
= outputamplitude in AM for f
M
= 1kHz and m = 30%
N
=
20 logV
15
(
mV
RMS
)
8
STV8224B
4/12
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