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参数资料
| 型号： | TA1275BFNG |
| 元件分类： | 颜色信号转换 |
| 英文描述： | COLOR SIGNAL DECODER, PDSO24 |
| 封装： | 0.300 INCH, 0.65 MM PITCH, PLASTIC, SSOP-24 |
| 文件页数： | 7/21页 |
| 文件大小： | 1249K |
| 代理商： | TA1275BFNG |
TA1275BFNG
2005-03-14
15
Test Conditions (Unless otherwise specified, V
CC = 5 V (Pins 2 & 15), Ta = 25°C)
Note
Item
Test Condition
1
Bell / Filter f0
(1) : Input a 20 mVp-p sine wave whose frequency is sweep
into Pin 20.
(2) : Connect Pin 20 to GND through 27 k.
(3) : Keep Pin 24 GND.
(4) : Measure the frequency at which the Pin 7 output is the
greatest, that is, "f0BEL".
(5) : Calculate
:
"f0B-C" = f0BEL4,286 kHz.
2
Bell / Filter f0 Variable Range
(1) : Input a 20 mVp-p sine wave whose frequency is sweep into Pin
20.
(2) : Connect pin 20 to GND through 27 k.
(3) : Measure the frequency at which the Pin 7 output is the greatest
when VCC is 5.5 V / 4.5 V, that is, f0BEL5.5 / f0BEL4.5.
(4) : Calculate
:
"f0B-H" = f0BELH4,286 kHz.
"f0B-L" = f0BELL4,286 kHz.
3
Bell / Filter Q
(1) : Input a 20 mVp-p sine wave whose frequency is sweep into Pin
20.
(2) : Connect Pin 20 to GND through 27 k.
(3) : Pin 24 is GND.
(4) : Observe the frequency response of the Pin 7 output.
(5) : Calculate
:
"QBEL" = (MAX3dB Band Width) / f0BEL.
4
Color Difference Output
Amplitude
(1) : Input a 75% color bar (200 mVp-p at R ID) into Pin 20.
(2) : Measure the R-Y output amplitude at Pin 9, that is, "VRS".
(3) : Measure the B-Y output amplitude at Pin 11, that is, "VBS".
5
Color Difference Relative
Amplitude
Calculate : "R / B-S" = VRS / VBS.
6
Linearity
(1) : Input a 75% color bar (200 mVp-p at R ID) into Pin 20.
(2) : Measure the amplitude between Black and Cyan / Red,
that is, VCyan / VRed.
(3) : Measure the amplitude between Black and Yellow /
Blue, that is, VYellow / VBlue.
(4) : Calculate : "LinR" = VCyan / VRed
"LinB" = VYellow / VBlue
7
Rising Time
(1) : Input a 75% color bar (200 mVp-p at R ID)
into Pin 20.
(2) : Measure the rising time (from 10% to 90%)
between Green and Magenta at Pin 9 / Pin 11, that is,
"trR" / "trB".
8
Demodulation Hold Range
9
Demodulation Capture Range
(1) : Input a 200 mVp-p, 2 MHz sine wave into Pin 20.
(2) : Increasing the input frequency, measure the
frequencies at which demodulated output
appears at Pin 9, that is, "CRL", and at which
demodulated output disappears at Pin 11, that is,
"HBH".
(3) : Input a 200 mVp-p, 7 MHz sine wave into Pin 20.
(4) : Decreasing the input frequency, measure the frequencies at which demodulated
output appears at Pin 11, that is, "CBH", and at which demodulated output
disappears at Pin 9, that is, "HRL".
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