參數(shù)資料
型號(hào)： TB1274BFG
元件分類： 消費(fèi)家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PQFP48
封裝： 10 X 14 MM, 0.80 MM PITCH, QFP-48
文件頁數(shù)： 22/37頁
文件大小： 839K
代理商： TB1274BFG
TB1274BFG
2005-08-18
29
TEST CONDITION ( Unless otherwise specified, YC-VCC/SYNC-VCC/D-VDD=5V and Ta=25±3℃ )
NOTE
ITEM
MEASURING METHOD
COMMON TEST CONDITION
①
Unless otherwise specified,- Y/C VCC, Sync-VCC and Digital VDD=5V, Ta=25±3℃.
②
Set the BUS data preset, unless otherwise specified.
③
Unless otherwise specified, SW33/34/35/39/41=A, ADD SW=B, Y1 SW=A, SYNC SW=A.
VIDEO SWITCH SECTION
COMMON TEST CONDITION FOR LUMINANCE SECTION
①
Set the BUS data as Sharpness f0 is.
V1
Maximum video input range
①
Set the BUS data as CVBS1 input is selected.
②
Minimize Y-OUT LEVEL via I2C BUS.
③
Input ramp-signal to CVBS1/Y1-IN(pin 1).
④
Measure input range on the right figure at pin21(Y-OUT).
Input
range
Output
2.0Vp-p
V2
CVBS-OUT amplitude gain
①
Set the BUS data as CVBS1 input is selected.
②
Input video signal (1.0Vp-p) to CVBS1/Y1-IN(pin 1).
③
Calculate the gain between input signal’s amplitude and amplitude of CVBS-OUT(pin 3).
V3
Frequency bandwidth
①
Set the BUS data as CVBS1 input is selected.
②
Input sweep-signal to pin 1(CVBS1/Y1-IN).
③
Measure the frequency where the ratio between the amplitude of pin 3(CVBS-OUT) and that of pin
1(CVBS1/Y1-IN) is -3dB by network analyzer .
V4
Crosstalk between each input
①
Input Signal 1(f0=4MHz, V0=0.7V, VS=0V) to pin 1(CVBS1/Y1-IN).
②
Set the BUS data as CVBS1 input is selected.
③
Short other input pins with AC coupling. Measure the amplitude of pin 3(CVBS-OUT). (V1)
④
Set the BUS data as CVBS2 input is selected via I2C BUS.
⑤
Measure the amplitude of pin 3(CVBS-OUT). (V2)
⑥
Crosstalk level from pin 1 to pin 3 is calculated by the following equation.
CT= 20log(V2 / V1)
⑦
Calculate leak levels on other cases as well.
V5
Y-OUT maximum output range
Cb-OUT maximum output range
Cr-OUT maximum output range
①
Set the BUS data as CVBS1 input is selected.
②
Maximize Y-OUT LEVEL via I2C BUS.
③
Measure Y output range at Y-OUT(pin 21) in the same as NOTE V1.
④
Measure Cb/Cr output range as well.
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