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參數(shù)資料
| 型號(hào)： | STV2246 |
| 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)： | 23/76頁(yè) |
| 文件大?。?/td> | 2157K |
| 代理商： | STV2246 |
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STV223XD/224XC - ELECTRICAL CHARACTERISTICS
23/76
4.4 IF SECTION
Tamb = 25°C, V
CCIF
= 5 V, V
CC2
= 8V, IF input =10 mV
RMS
(at sync level for negative modulation, or at
peak white level for positive modulation).
Video modulation DSB, D = 90% and f
SC
= 33.4 MHz in B/G, D = 95% in L, f
PC
= 38.9 MHz.
Video Bandwidth = 5 MHz, AF = 1 kHz, Audio Bandwidth = 20 kHz, FMdev =
±
27 kHz.
Volume Attenuation = 0 dB, AM carrier input: 10 mV
RMS
, 54% modulated unless otherwise specified.
PIF AMPLIFIER
PIFAGC NEGATIVE MODULATION
PIFAGC POSITIVE MODULATION
TUNER AGC
Symbol
VINPIF
RINPIF
CINPIF
GR
VMax.
Parameter
Test Conditions
Min.
75
1.5
1.5
Typ
85
2
2
65
0.15
Max.
95
2.5
2.5
Unit
μV
RMS
k
pF
dB
V
RMS
Input Sensitivity
Differential Input Resistance
Differential Input Capacitance
Gain Control Range
Maximum Input Signal
-1dB at Video Output (INTCVBSOUT)
PIF Inputs.
PIF Inputs.
+1dB at Video Output (INTCVBSOUT) 0.12
Symbol
I
C
Parameter
Test Conditions
Min.
450
Typ
675
Max.
900
Unit
μA
Charging Current at AGCPIFCAP Pin
Discharging Current at AGCPIFCAP
Pin
Charging/Discharging Current Ratio
I
D
10
15
20
μA
I
C
/I
D
41
45
49
Symbol
I
C
Parameter
Test Conditions
Min.
1.75
Typ
2.5
Max.
3.25
Unit
mA
Charging Current at AGCPIFCAP Pin
Discharging Current at AGCPIFCAP
Pin
I
D
0.15
0.25
0.35
μA
I
CP
Additional Charging Current at
AGCPIFCAP Pin
L mode in case of missing VITS
pulses and no white in Video con-
tent
Referred to nominal black level
2.3 V
PP
at INTCVBSOUT Pin
2.8
4
5.2
μA
THICP
Threshold for additional charging cur-
rent
Additional Discharging Current
Threshold for additional discharging
current
160
mV
I
DP
20
30
40
μA
THIDP
Referred to nominal black level
2.3 V
PP
at INTCVBSOUT Pin
-345
mV
Symbol
IAGCT
Parameter
Test Conditions
Min.
1.5
Typ
2
50
95
170
270
40
12
2
80
Max.
2.5
Unit
mA
Maximum Sinked Current
SAGCT
Tuner AGC Slope (current)
Reg 03 (D7, D6)
00
01
10
11
μA/dB
I
AGCP
Maximum Tuner plus Sinked Current (See Note 1)
mA
AGCST
Tuner AGC Starting Point (IF input
related signal)
Reg 03 (D5 to D0 = 10 0000)
Reg 03 (D5 to D0 = 00 0000)
Reg 03 (D5 to D0 = 11 1111)
mV
RMS
STT
Variation of take over point with tem-
perature
0.03
0.07
dB/K
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|---|---|
| STV2246C | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:I2C BUS-CONTROLLED MULTISTANDARD SINGLE CHIP TV PROCESSOR |
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