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參數(shù)資料
| 型號： | TA1276AF |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP80 |
| 封裝： | 14 X 20 MM, 0.80 MM PITCH, PLASTIC, QFP-80 |
| 文件頁數(shù)： | 36/83頁 |
| 文件大小： | 1585K |
| 代理商： | TA1276AF |
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TA1276AF
2002-01-29
41
Test Conditions (unless otherwise stated, VCC1 = 5 V, VCC2/VCC3/DEF VCC = 9 V, Ta = 25 ± 3°C)
Switching Mode
Note
Parameter
SW15
SW49
SW50
SW53
Test Conditions
V8
Black Peak Detect Level
C
ON
C
1)
Set the BUS control data to the preset value.
2)
Measure the DC voltage V49 of pin 3.
3)
Connect pin 78 to an external power supply (PS).
4)
Turn the Y mute off (1), the black stretch gain off (1), and set the black detect level shift to 0 IRE (1).
5)
Increase the PS from 0 V and measure the voltage VBP of pin 3 where the DC level of the picture period of pin 2 shifts
from high to low.
6)
Calculate
VBP from the following formula.
VBP = VBP V49
V9
DC Transmission Rate
Compensation Gain
C
ON
B
C
1)
Set the BUS control data to the preset value.
2)
Turn the Y mute off (1), turn the video mute off (0), and connect pin 78 to an external power supply (PS).
3)
Measure the amplitude V43 of pin 11, set the PS to V53 + 0.7 V, and adjust V43 to 0.7 Vp-p using unicolor.
4)
With the DC transmission rate compensation gain at the minimum (000), measure
V1 and V2 as in the diagram
below.
5)
Next, with the DC transmission rate compensation gain at the maximum (111), measure
V3 and V4.
6)
Calculate ADT100 and ADT130 from the following formula.
ADT100
= (V2 [V] V1 [V]) ÷ 0.1 [V]
ADT130
= (V4 [V] V3 [V]) ÷ 0.1 [V]
Picture period
V1 (V3)
V53 + 0.1 [V]
V2 (V4)
Pin 11 waveform
V53 + 0.2 [V]
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