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參數(shù)資料
| 型號： | TA8795BF |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP60 |
| 封裝： | 14 X 14 MM, 0.80 MM PITCH, PLASTIC, QFP-60 |
| 文件頁數(shù)： | 27/45頁 |
| 文件大?。?/td> | 1139K |
| 代理商： | TA8795BF |
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TA8795BF
2001-01-15 33/45
TEST CONDITIONS : VCC = 5V, Ta = 25±3°C
SW No. AND VR MODE
No.
PARAMETER
SYMBOL
UNIT
MIN
TYP.
MAX
15
16
18
19
21
24
31
34
38
47
55
TEST METHOD
C19
SECAM color
difference output
eS43
eS44
eS45
mVp-p
―
2.80
―
Open
A
―
C
A
Open Open Open
―
1. To pin 24, input a 75% standard color bar signal with an
amplitude of 300mVp-p.
2. Measure the color difference levels of pins 43, 44, and 45.
C20
SECAM
demodulation
bandwidth
#43R
BAND
#45B
BAND
MHz
0.80
1.15
―
A
―
C
A
OFF Open ON OFF
C21
SECAM relative
amplitude
SR / SB
SG / SB
C
/
A
24A
A
Sig
ON
A
/
Open
OFF
ON
OFF
―
1. To pin 24, input FM 100kHz, 100dBV, fm 1kHz / div
signal.
2. When measuring the R-Y and B-Y signals, vary the fOR =
4.406MHz and fOB = 4.25MHz signals respectively and
measure the 3dB bandwidth in the color difference
output.
Also measure the relative amplitudes of V45 and V43
when fOR is 4.406MHz and fOB is 4.25MHz.
3. No horizontal pulse.
C22 SECAM crosstalk
eSR
eR
RC
eSB
eB
BC
Vp-p
mVp-p
dB
Vp-p
mVp-p
dB
―
30.0
―
30.0
1.00
20
34
1.40
30
33
―
Open
A
―
C
A
Open Open Open ON OFF
1. To pin 24, input a 75% standard color bar signal with an
amplitude of 300mVp-p.
2. Measure the pin 43 B-Y and the pin 45 R-Y output color
difference amplitudes. Also measure the fOR and fOB
160kHz beat frequency amplitudes.
3. Show the SECAM crosstalk as follows.
Attenuation = 20og (eR / eSR) = RC
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