參數(shù)資料
型號(hào): STV2248
元件分類: 參考電壓二極管
英文描述: Low Current Operation at 250 ,Low Reverse Leakage,Low Noise Zener Diode
中文描述: 250 的低電流運(yùn)算,低反向泄露,低噪聲穩(wěn)壓二極管
文件頁(yè)數(shù): 31/76頁(yè)
文件大?。?/td> 2157K
代理商: STV2248
STV223XD/224XC - ELECTRICAL CHARACTERISTICS
31/76
4.7 FILTERS
Y TRAP FILTER
CHROMINANCE BANDPASS
CLOCHE FILTER
4.8 CHROMA PART
ACC
Symbol
f
TRAP-PN
Parameter
Test Conditions
Min.
Typ
f
OSC
4.2
4.5
Max.
Unit
MHz
Notch Frequency
PAL/NTSC
SECAM fnb
SECAM fnr
f
TRAP-S
Notch Frequencies
MHz
f
TRAP-ACC
Notch Frequency Accuracy
3.5
%
Q
TRAP
Trap Quality Factor
Q = 1/ (f0/f-3dB - f-3dB/f0), Peaking
Min.
PAL/NTSC
From 4.1 to 4.6 MHz
At 3.9 MHz
1.5
-
CrejPN
Color Subcarrier Rejection
20
dB
CrejS
Color Rejection in SECAM Mode
10
20
dB
Symbol
f
BP
Q
BP
Parameter
Test Conditions
Min.
-5%
2.8
Typ
f
OSC
3.5
Max.
+5%
4.2
Unit
MHz
-
Center Frequency
Bandpass Quality Factor
Register 12h, d3-d0 = 0000
Symbol
f
CLOCHE
Q
BP
Parameter
Test Conditions
Min.
4.27
14
Typ
4.29
16
Max.
4.31
18
Unit
MHz
-
Center Frequency
Cloche Quality Factor
Register 11h, d4-d0 = 00000
Symbol
Parameter
Test Conditions
Min.
Typ
Max.
Unit
G
ACC
ACC Control Range
Change of burst overall ACC control
range < 2dB
Within the ACC control range
26
dB
V
Min.
Minimum Burst Signal Amplitude
0.03
V
PP
ACC OVERLOAD
Symbol
V
TH
Parameter
Test Conditions
Min.
Typ
3
Max.
Unit
dB
Chroma regulation Threshold
ACC overload ON, PAL/NTSC
KILLER
Symbol
Parameter
Test Conditions
Min.
Typ
Max.
Unit
Ident-kill
Color on Threshold of ident. circuit
Burst amplitude on selected CVBS
input
Strong signal condition, S/N > 40 dB
5
mV
PP
Kill-Hyst
Color off Killer Hysteresis
2
mV
PP
CHROMA PLL
Symbol
Parameter
Test Conditions
Min.
Typ
Max.
Unit
CaptR
Catching Range
With recommended crystal and rec-
ommended CLPF filter value.
±300
HoldR
Holding Range
> or = to capture range
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